{"category":{"slug":"email","name":"Email","icon":"pixelarticons:mail","description":"Transactional email, inboxes, deliverability"},"tools":[{"_id":"69b2da6867df398baec12ed0","name":"Amazon SES","slug":"amazon-ses","url":"https://aws.amazon.com/ses","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":7,"confidence":"scanner","evidence":"AWS SDK responses are generally well-structured with selective field support, though SES API responses can be verbose for batch operations and lack native field selection at the API level.","na":false},"access":{"score":8,"confidence":"scanner","evidence":"Strong programmatic access via REST API, official AWS SDKs in multiple languages (@aws-sdk/client-ses, @aws-sdk/client-sesv2), AWS CLI support, and numerous third-party integrations, though no MCP server or GraphQL interface.","na":false},"auth":{"score":9,"confidence":"scanner","evidence":"AWS IAM provides granular, scoped permissions for SES operations, supports API keys/credentials with test/production separation, enables autonomous agent authentication without human-in-the-loop, and is an industry standard.","na":false},"speed":{"score":8,"confidence":"scanner","evidence":"AWS SES is a managed service with reliable performance, supports bulk send operations for batching, has documented rate limits with configurable throughput, though network latency is inherent to cloud-based email services.","na":false},"discoverability":{"score":7,"confidence":"scanner","evidence":"AWS documentation is comprehensive and well-organized with API reference, though no OpenAPI spec was found; predictable AWS API naming conventions and error messages aid discoverability.","na":false},"reliability":{"score":8,"confidence":"scanner","evidence":"AWS SES includes API versioning, consistent JSON response schemas, documented SLA and status page, and supports idempotent operations through message IDs, providing high reliability for production use.","na":false},"safety":{"score":7,"confidence":"scanner","evidence":"SES offers sandbox mode for testing without production impact, IAM-based access control for scope limitation, though it lacks built-in dry-run capabilities and undo operations are limited to bounce/complaint suppression.","na":false},"reactivity":{"score":6,"confidence":"scanner","evidence":"SES supports SNS notifications for delivery events and bounce/complaint callbacks, enabling event-driven workflows, though native webhook support is limited and agents must implement polling for status checks.","na":false}},"agentGrade":"B+","agentScore":7.68,"accessMethods":{"restApi":true,"graphql":false,"cli":true,"sdk":[],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":51,"badgeEmbedCount":7,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.715Z","updatedAt":"2026-04-08T12:21:19.349Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:38:39.315Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":226348,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":true,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":true,"hasSitemap":true}},"packages":{"npm":[{"name":"@strapi/provider-email-amazon-ses","description":"Amazon SES provider for strapi email","version":"5.39.0"},{"name":"amazon-ses","description":"Simple Amazon SES Mailer","version":"0.0.3"},{"name":"@upyo/ses","description":"Amazon SES transport for Upyo email library","version":"0.4.0"},{"name":"@logto/connector-aws-ses","description":"Logto Connector for Amazon SES","version":"1.5.1"},{"name":"@akemona-org/strapi-provider-email-amazon-ses","description":"Amazon SES provider for strapi email","version":"3.18.2"},{"name":"@aws-sdk/client-ses","description":"AWS SDK for JavaScript Ses Client for Node.js, Browser and React Native","version":"3.1008.0"},{"name":"@aws-sdk/client-sesv2","description":"AWS SDK for JavaScript Sesv2 Client for Node.js, Browser and React Native","version":"3.1008.0"},{"name":"aws-ses-v2-local","description":"A local version of Amazon Simple Email Service (AWS SES) supporting the V2 API","version":"2.9.0"},{"name":"@haftahave/serverless-ses-template","description":"Serverless template sync plugin for Amazon Simple Email Service","version":"6.2.0"}],"pypi":[],"cli":true,"sdks":[]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Lack of OpenAPI specification and MCP server support requires agents to rely on AWS SDK documentation and custom integration code rather than automatically consuming API metadata.","agentSummary":"Amazon SES is well-suited for agent integration with excellent auth via IAM, strong SDK availability across languages, and reliable API design, making it accessible for email automation tasks. The main gaps are the absence of an OpenAPI spec and MCP server, which would enable agents to self-discover capabilities more effectively."}},{"_id":"69b2da6867df398baec12eca","name":"Postmark","slug":"postmark","url":"https://postmarkapp.com","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":7,"confidence":"scanner","evidence":"REST API with structured JSON responses and support for filtering/pagination, though no explicit field selection capability limits optimization for large bulk operations.","na":false},"access":{"score":8,"confidence":"scanner","evidence":"Strong programmatic access via REST API, official SDKs in Node.js and Python, CLI tool for templates and server management, and multiple third-party integrations (Nodemailer, Strapi), but lacks MCP server.","na":false},"auth":{"score":9,"confidence":"scanner","evidence":"API key-based authentication with no OAuth complexity, allowing autonomous agent operation; Postmark supports server tokens and account tokens with granular permission scoping typical of transactional email services.","na":false},"speed":{"score":7,"confidence":"scanner","evidence":"Email delivery is asynchronous with good throughput, but no explicit mention of rate limits, ETags, or conditional requests in signals; typical transactional email API performance is solid but not optimized for real-time queries.","na":false},"discoverability":{"score":6,"confidence":"scanner","evidence":"Homepage indicates developer documentation exists and structured data is present, but no OpenAPI spec found and no llms.txt or agents.json for AI-specific discovery; standard API patterns are likely predictable but not formally documented for agents.","na":false},"reliability":{"score":8,"confidence":"scanner","evidence":"Postmark is a mature transactional email provider with idempotency support via MessageID for deduplication and consistent API versioning; typical of enterprise email services with high reliability standards.","na":false},"safety":{"score":7,"confidence":"scanner","evidence":"Server tokens allow scoped access to specific servers/accounts; sandbox/test mode available via separate test servers; email sending is inherently low-risk but limited undo capability for sent messages.","na":false},"reactivity":{"score":6,"confidence":"scanner","evidence":"Postmark supports webhooks for delivery, bounce, and open events enabling event-driven workflows, but no streaming or SSE; webhook support is solid for email-specific reactive patterns.","na":false}},"agentGrade":"B+","agentScore":7.44,"accessMethods":{"restApi":true,"graphql":false,"cli":true,"sdk":["Node (postmark)","Python (postmark)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":27,"badgeEmbedCount":4,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.714Z","updatedAt":"2026-04-08T02:36:35.381Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:38:09.309Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":88207,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":true,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":false,"hasSitemap":true}},"packages":{"npm":[{"name":"postmark","description":"Official Node.js client library for the Postmark HTTP API - https://www.postmarkapp.com","version":"4.0.7"},{"name":"nodemailer-postmark-transport","description":"Postmark transport for Nodemailer","version":"6.0.1"},{"name":"postmark-cli","description":"A CLI tool for managing templates, sending emails, and fetching servers on Postmark.","version":"1.6.19"},{"name":"strapi-provider-email-postmark","description":"Strapi Email service provider for Postmark","version":"4.0.1"},{"name":"@logto/connector-postmark","description":"Postmark connector implementation.","version":"1.2.1"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"}],"pypi":[{"name":"postmark","version":"1.0.0","description":"Postmark API"}],"cli":true,"sdks":["Node (postmark)","Python (postmark)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Lack of OpenAPI spec and no AI-specific discovery mechanisms (llms.txt, agents.json, MCP server) makes it harder for agents to automatically understand and integrate with the API compared to more agent-optimized tools.","agentSummary":"Postmark is well-suited for agent use with strong API key auth, multiple SDKs, and CLI access, making autonomous integration straightforward for email operations. However, the absence of formal OpenAPI documentation and AI-specific discovery signals limits discoverability, and the service's email-specific scope constrains use cases compared to broader platforms."}},{"_id":"69b2d647de1ed13732dc08f8","name":"Resend","slug":"resend","url":"https://resend.com","description":"Email API for developers. Send transactional emails, manage contacts, domains, and campaigns.","logo":"","category":"Email","tags":["email","transactional-email","api","developer-tools"],"pricingModel":"freemium","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Email API typically returns structured, compact responses but lacks explicit field selection and batching capabilities, making it moderately efficient for agent use.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Offers REST API with Node.js and Python SDKs, an MCP server (resend-mcp), and framework integrations (Convex, Payload, NestJS), providing solid programmatic access without OpenAPI spec.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"Supports API key authentication for autonomous agent use with no OAuth requirement, enabling straightforward scoped access and test/production key separation typical of email service providers.","na":false},"speed":{"score":7,"confidence":"scanner","evidence":"Email APIs generally have reasonable latency and standard rate limits, though no explicit data on conditional requests (ETags) or concurrent batch support in the signals provided.","na":false},"discoverability":{"score":6,"confidence":"scanner","evidence":"Has llms.txt and developer docs indicating API-first design, but lacks OpenAPI spec which limits automatic integration and schema discovery for agents.","na":false},"reliability":{"score":7,"confidence":"scanner","evidence":"Email service providers typically implement idempotency and versioning for critical operations, and the mature npm package (v6.9.3) suggests stable schema consistency, though explicit status page data is absent.","na":false},"safety":{"score":6,"confidence":"scanner","evidence":"Supports test/production API keys and allows scoped access, but lacks explicit dry-run mode, undo capabilities, or sandbox environment for email operations typical of safer service designs.","na":false},"reactivity":{"score":4,"confidence":"scanner","evidence":"No evidence of webhooks, streaming, or SSE support in collected signals; email operations are inherently asynchronous but agents would rely on polling or external event tracking.","na":false}},"agentGrade":"B","agentScore":6.64,"scannerData":{"lastScannedAt":"2026-03-12T19:17:41.374Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":441674,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":true,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":true,"path":"/llms.txt","length":1213},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":false,"hasSitemap":true}},"packages":{"npm":[{"name":"resend","description":"Node.js library for the Resend API","version":"6.9.3"},{"name":"@convex-dev/resend","description":"A resend component for Convex.","version":"0.2.3"},{"name":"@payloadcms/email-resend","description":"Payload Resend Email Adapter","version":"3.79.0"},{"name":"resend-mcp","description":"[![smithery badge](https://smithery.ai/badge/@resend/resend-mcp)](https://smithery.ai/server/@resend/resend-mcp) [![npm version](https://img.shields.io/npm/v/resend-mcp)](https://www.npmjs.com/package/resend-mcp)","version":"2.2.0"},{"name":"nestjs-resend","description":"NestJS provider for sending emails with resend","version":"1.1.0"}],"pypi":[{"name":"resend","version":"2.23.0","description":"Resend Python SDK"}],"cli":false,"sdks":["Node (resend)","Python (resend)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of an OpenAPI specification and webhook support forces agents to rely on SDK documentation and polling patterns, reducing autonomous integration flexibility compared to modern API platforms.","agentSummary":"Resend is well-positioned for agent use with solid API access, MCP server support, and autonomous API key authentication, making it straightforward for agents to send emails programmatically. However, the lack of OpenAPI documentation and reactive features (webhooks/streaming) limits agent discoverability and real-time responsiveness compared to fully agent-optimized platforms."},"accessMethods":{"restApi":true,"graphql":false,"cli":false,"sdk":["Node (resend)","Python (resend)"],"mcpServer":"none","openApiSpec":"","llmsTxt":true,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":21,"badgeEmbedCount":4,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:05:43.809Z","updatedAt":"2026-03-25T10:42:04.865Z","__v":0},{"_id":"69b2da6867df398baec12ed3","name":"Mailchimp","slug":"mailchimp","url":"https://mailchimp.com","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Mailchimp's REST API supports field selection and pagination, but lacks explicit batching endpoints and response compactness is average for marketing platforms.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Mailchimp offers a REST API with official SDKs for Node and Python, plus multiple community packages, but lacks GraphQL, MCP servers, and a native CLI tool.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"Mailchimp supports API key authentication with granular permission scoping, enabling autonomous agent authentication without OAuth or human intervention.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"Standard REST API latency typical for SaaS platforms, with rate limits available, but no ETags for conditional requests or explicit concurrent request documentation.","na":false},"discoverability":{"score":7,"confidence":"scanner","evidence":"Mailchimp has comprehensive developer documentation and structured data on homepage, but lacks an OpenAPI spec and no llms.txt or agents.json files for AI discovery.","na":false},"reliability":{"score":7,"confidence":"scanner","evidence":"REST API with versioning support and consistent response schemas, but idempotency key support across endpoints is not explicitly documented in available signals.","na":false},"safety":{"score":5,"confidence":"scanner","evidence":"API key scoping provides some access control, but lacks explicit sandbox/test mode documentation, dry-run capabilities, and clear undo mechanisms for destructive operations.","na":false},"reactivity":{"score":5,"confidence":"scanner","evidence":"Mailchimp supports webhooks for event notifications, but lacks streaming, Server-Sent Events, or documented polling optimization strategies.","na":false}},"agentGrade":"B","agentScore":6.6,"accessMethods":{"restApi":true,"graphql":false,"cli":false,"sdk":["Node (@mailchimp/mailchimp_transactional)","Python (mailchimp)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":21,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.716Z","updatedAt":"2026-04-07T11:25:03.846Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:38:49.750Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":498220,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":true,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":false,"hasSitemap":true}},"packages":{"npm":[{"name":"@mailchimp/mailchimp_transactional","description":"The official Node client library for the Mailchimp Transactional API","version":"1.3.3"},{"name":"@mailchimp/mailchimp_marketing","description":"The official Node client library for the Mailchimp Marketing API","version":"3.0.80"},{"name":"mailchimp-api-v3","description":"Mailchimp wrapper for v3 of the mailchimp api, with transparant handling of batch operations","version":"1.15.0"},{"name":"react-mailchimp-subscribe","description":"react-mailchimp-subscribe React component","version":"2.1.3"},{"name":"@types/mailchimp__mailchimp_transactional","description":"TypeScript definitions for @mailchimp/mailchimp_transactional","version":"1.0.11"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"}],"pypi":[{"name":"mailchimp","version":"2.0.10","description":"Deprecated. Replaced by mailchimp-marketing - A CLI client and Python API library for the MailChimp email platform."}],"cli":false,"sdks":["Node (@mailchimp/mailchimp_transactional)","Python (mailchimp)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of an OpenAPI specification and AI-specific metadata files (llms.txt/agents.json) significantly hinders agent discoverability and autonomous API exploration.","agentSummary":"Mailchimp is a capable marketing platform with solid REST API support, strong authentication via API keys, and official SDKs, making it accessible to agents for email and marketing operations. However, missing formal API specifications and AI-specific discovery mechanisms limit its agent-readiness compared to best-in-class platforms."}},{"_id":"69b2da6867df398baec12ee5","name":"Mailtrap","slug":"mailtrap","url":"https://mailtrap.io","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Official SDKs and API client packages suggest structured responses, but no OpenAPI spec or explicit pagination/field selection documentation is visible to confirm token efficiency practices.","na":false},"access":{"score":8,"confidence":"scanner","evidence":"Multiple SDKs (Node, Python), an official MCP server (mcp-mailtrap), native n8n integration, and Strapi provider demonstrate comprehensive programmatic access with strong ecosystem coverage.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"Official API client packages and MCP server indicate API key-based authentication with no mention of OAuth-only restrictions, enabling autonomous agent authentication.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"No explicit data on rate limits, ETags, or concurrency support in available signals; homepage response time not measured, suggesting typical SaaS latency without visible optimization hints.","na":false},"discoverability":{"score":5,"confidence":"scanner","evidence":"No OpenAPI spec found, no llms.txt or agents.json files, and robots.txt blocks agents; developer docs exist but lack machine-readable specifications for agent integration.","na":false},"reliability":{"score":6,"confidence":"scanner","evidence":"Mature SDK versions (4.4.0 for Node) and long-term package availability suggest stability, but no visible API versioning strategy, status page reference, or idempotency documentation in signals.","na":false},"safety":{"score":7,"confidence":"scanner","evidence":"Official MCP server and sandbox-capable testing tools (mcp-mailtrap at 0.1.0 maturity) indicate test mode support; scoped permissions likely available through API keys but not explicitly confirmed.","na":false},"reactivity":{"score":4,"confidence":"scanner","evidence":"No webhooks, streaming, or SSE mentioned in available signals; agent integration relies on polling through API clients without native event-driven capabilities.","na":false}},"agentGrade":"B","agentScore":6.56,"accessMethods":{"restApi":true,"graphql":false,"cli":false,"sdk":["Node (mailtrap)","Python (mailtrap)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":22,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.724Z","updatedAt":"2026-04-01T08:56:17.999Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:39:49.409Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":339567,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":true,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":true,"hasSitemap":false}},"packages":{"npm":[{"name":"mailtrap","description":"Official mailtrap.io API client","version":"4.4.0"},{"name":"mcp-mailtrap","description":"Official MCP Server for Mailtrap","version":"0.1.0"},{"name":"n8n-nodes-mailtrap","description":"n8n node for Mailtrap integration (send email, manage contacts)","version":"1.1.4"},{"name":"strapi-provider-email-mailtrap","description":"Mailtrap provider for strapi email","version":"3.5.0"},{"name":"townkrier-mailtrap","description":"Mailtrap email adapter for Townkrier notification system","version":"1.0.1-alpha.1"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"},{"name":"mcp-framework","description":"Framework for building Model Context Protocol (MCP) servers in Typescript","version":"0.2.18"},{"name":"@modelcontextprotocol/sdk","description":"Model Context Protocol implementation for TypeScript","version":"1.27.1"}],"pypi":[{"name":"mailtrap","version":"2.4.0","description":"Official mailtrap.io API client"}],"cli":false,"sdks":["Node (mailtrap)","Python (mailtrap)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of OpenAPI spec and agent-discovery files (llms.txt, agents.json) combined with robots.txt agent blocking significantly limits discoverability and automated integration for AI agents.","agentSummary":"Mailtrap offers strong programmatic access through official SDKs, an MCP server, and multiple ecosystem integrations, making it well-positioned for agent use despite lacking machine-readable API specifications. The main barriers are missing OpenAPI documentation and agent-blocking robots.txt, which require agents to rely on SDK knowledge rather than autonomous API exploration."}},{"_id":"69b2da6867df398baec12ecd","name":"Mailgun","slug":"mailgun","url":"https://mailgun.com","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"REST API with standard pagination support, but no indication of field selection, sparse fieldsets, or response compression capabilities for managing large email lists or batch operations.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Multiple SDKs available (Node.js, Python, JavaScript), REST API, and integrations with popular frameworks (NestJS, nodemailer), but no OpenAPI spec, MCP server, or CLI tool limits programmatic discovery and agent autonomy.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"API key-based authentication with no OAuth requirement enables autonomous agent operation, and Mailgun's domain-based scoping allows credential isolation between different email sending contexts.","na":false},"speed":{"score":7,"confidence":"scanner","evidence":"Email API typically has reasonable latency for transactional delivery, but no explicit data on rate limits, ETag support, or concurrent request handling; batch sending capabilities suggest good throughput but are not explicitly documented.","na":false},"discoverability":{"score":5,"confidence":"scanner","evidence":"Structured data and developer docs present on homepage, but absence of OpenAPI spec significantly limits automated discovery; API endpoints likely follow REST conventions but require manual documentation review.","na":false},"reliability":{"score":7,"confidence":"scanner","evidence":"Email APIs typically support idempotency keys for transactional safety and have stable versioned endpoints, but no explicit signals about versioning strategy, schema consistency, or status page monitoring.","na":false},"safety":{"score":6,"confidence":"scanner","evidence":"Mailgun offers sandbox domains for testing and API key scoping by domain, but no evidence of dry-run modes, granular permission scopes, or explicit undo mechanisms for sent emails.","na":false},"reactivity":{"score":5,"confidence":"scanner","evidence":"Email service inherently supports event webhooks for delivery tracking and bounces, but no evidence of streaming endpoints, Server-Sent Events, or real-time subscription mechanisms.","na":false}},"agentGrade":"B","agentScore":6.56,"accessMethods":{"restApi":true,"graphql":false,"cli":false,"sdk":["Node (@types/mailgun-js)","Python (mailgun)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":22,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.715Z","updatedAt":"2026-04-02T01:10:01.732Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:38:29.205Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":334315,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":false,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":false,"hasSitemap":true}},"packages":{"npm":[{"name":"@types/mailgun-js","description":"TypeScript definitions for mailgun-js","version":"0.22.19"},{"name":"@types/nodemailer-mailgun-transport","description":"TypeScript definitions for nodemailer-mailgun-transport","version":"1.4.6"},{"name":"mailgun","description":"Mailgun for Node.js","version":"0.5.0"},{"name":"mailgun.js","description":"A javascript sdk for Mailgun built with webpack, babel & es6. This can be used in node or in the browser*.","version":"12.7.1"},{"name":"nestjs-mailgun","description":"NestJS provider for sending emails with mailgun","version":"4.0.3"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"},{"name":"nodemailer-mailgun-transport","description":"A transport module to use with nodemailer to leverage Mailgun's REST API","version":"2.1.5"}],"pypi":[{"name":"mailgun","version":"1.6.0","description":"Python SDK for Mailgun"}],"cli":false,"sdks":["Node (@types/mailgun-js)","Python (mailgun)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of an OpenAPI specification and MCP server forces agents to rely on hardcoded knowledge of API endpoints and manual SDK integration rather than autonomous discovery and tool use.","agentSummary":"Mailgun is a well-established email API with solid REST and SDK support, making it accessible to agents with proper authentication and credential management. However, the lack of OpenAPI specs and MCP servers limits autonomous discoverability, and missing dry-run capabilities create safety friction for batch email operations."}},{"_id":"69b2da6867df398baec12ee2","name":"Customer.io","slug":"customer-io","url":"https://customer.io","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Customer.io offers REST APIs with standard pagination and filtering capabilities, but no evidence of field selection, GraphQL alternatives, or explicit batching optimization to minimize response payloads.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Multiple official SDKs available (Node.js, Python, React Native) with a well-documented REST API, but absence of OpenAPI spec, MCP server, or CLI tool limits programmatic flexibility for agents.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"Customer.io supports API key authentication which enables autonomous agent access without OAuth friction; API keys can be scoped and managed through the dashboard for secure, agent-friendly authentication.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"Standard REST API architecture with typical cloud latency, but no visible evidence of ETags, conditional requests, rate limit headers optimization, or explicit concurrency guidance for agents.","na":false},"discoverability":{"score":5,"confidence":"scanner","evidence":"Has developer documentation and structured data on homepage, but lacks OpenAPI specification, no .well-known endpoints for discovery, and no agent-specific documentation or endpoint patterns published.","na":false},"reliability":{"score":6,"confidence":"scanner","evidence":"REST API implies versioning and consistent schemas typical of mature platforms, but no explicit evidence of idempotency keys, API status page visibility, or documented error handling patterns.","na":false},"safety":{"score":5,"confidence":"scanner","evidence":"API key scoping provides basic access control, but no explicit evidence of test/sandbox environments, dry-run modes, undo capabilities, or soft-delete operations that agents would need for safe automation.","na":false},"reactivity":{"score":6,"confidence":"scanner","evidence":"Customer.io likely supports webhooks for event-driven integrations (standard for CDP platforms), but no evidence of SSE, streaming capabilities, or documented webhook reliability patterns for agent polling efficiency.","na":false}},"agentGrade":"B","agentScore":6.3,"accessMethods":{"restApi":true,"graphql":false,"cli":false,"sdk":["Node (customerio-node)","Python (customerio)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":27,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.723Z","updatedAt":"2026-04-02T03:44:13.798Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:39:39.185Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":486691,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":false,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":true,"hasSitemap":true}},"packages":{"npm":[{"name":"customerio-node","description":"A node client for the Customer.io event API. http://customer.io","version":"4.3.0"},{"name":"@customerio/cdp-analytics-node","description":"Customer.io Data Pipelines analytics client for Node.js.","version":"0.3.19"},{"name":"@customerio/cdp-analytics-browser","description":"Customer.io Data Pipelines analytics client for browsers.","version":"0.3.19"},{"name":"@analytics/customerio","description":"Customer.io integration for 'analytics' module","version":"0.2.2"},{"name":"node-customer.io","description":"Customer.io node.js API wrapper","version":"0.0.2"},{"name":"customerio-reactnative","description":"Official Customer.io SDK using React Native. Track customers and send messages to your iOS/Android apps.","version":"6.3.1"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"customerio-expo-plugin","description":"Expo config plugin for the Customer IO React Native SDK","version":"3.2.0"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"}],"pypi":[{"name":"customerio","version":"2.3","description":"Customer.io Python bindings."}],"cli":false,"sdks":["Node (customerio-node)","Python (customerio)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of an OpenAPI spec and MCP server significantly limits agent discoverability and standardized integration, forcing agents to rely on manually written SDK wrappers or documentation-based API exploration.","agentSummary":"Customer.io is moderately agent-ready with solid API key authentication and official SDKs, but lacks discoverable API specifications and explicit agent-optimization features like OpenAPI or MCP support. The platform would benefit most from publishing an OpenAPI spec and test/sandbox environments to improve agent safety and autonomous authentication."}},{"_id":"69b2da6867df398baec12edc","name":"Loops","slug":"loops","url":"https://loops.so","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Official JavaScript SDK exists suggesting structured API design, but no OpenAPI spec, GraphQL option, or field selection capabilities are documented, limiting optimization possibilities.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Tool offers REST API, official JavaScript SDK (v6.2.1), Python SDK, and CLI support, providing multiple programmatic access methods, though no MCP server or GraphQL option limits integration breadth.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"API key-based authentication is strongly implied by the SDK structure and developer docs, enabling autonomous agent authentication without human-in-the-loop OAuth flows.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"Response time data is unavailable from collected signals; SDK batching capabilities are likely but unconfirmed, and rate limit information is not documented, creating uncertainty around concurrent agent usage.","na":false},"discoverability":{"score":6,"confidence":"scanner","evidence":"llms.txt file exists (1911 bytes) showing AI-agent awareness, developer docs are present, and structured data is available, but the absence of an OpenAPI spec significantly hinders automatic endpoint discovery.","na":false},"reliability":{"score":5,"confidence":"scanner","evidence":"Versioned SDKs (v6.2.1) suggest API stability, but no explicit documentation of idempotency keys, API versioning strategy, status page, or consistent schema guarantees is evident from available signals.","na":false},"safety":{"score":4,"confidence":"scanner","evidence":"No evidence of sandbox/test mode, dry-run capabilities, or scoped API key restrictions is documented; robots.txt allows indexing and no mention of undo mechanisms suggests limited safety guardrails.","na":false},"reactivity":{"score":3,"confidence":"scanner","evidence":"No webhook, streaming, SSE, or event-driven capabilities are mentioned in available signals, suggesting the tool relies primarily on polling-based patterns for agent reactivity.","na":false}},"agentGrade":"B","agentScore":6.12,"accessMethods":{"restApi":true,"graphql":false,"cli":true,"sdk":["Node (eslint-plugin-no-loops)","Python (loops)"],"mcpServer":"none","openApiSpec":"","llmsTxt":true,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":20,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.721Z","updatedAt":"2026-03-24T21:26:06.866Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:39:21.115Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":958968,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":false,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":true,"path":"/llms.txt","length":1911},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":false,"hasSitemap":true}},"packages":{"npm":[{"name":"eslint-plugin-no-loops","description":"Disallow loops","version":"0.4.0"},{"name":"loops","description":"This is the official JavaScript SDK for [Loops](https://loops.so), with full TypeScript support.","version":"6.2.1"},{"name":"eslint-plugin-no-for-of-loops","description":"Prevents for..of loops usage","version":"1.0.1"},{"name":"looper","description":"async loops that never RangeError","version":"4.0.0"},{"name":"graph-cycles","description":"Analyze a graph to find cyclic loops","version":"3.0.0"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/cli","description":"Playwright CLI","version":"0.1.1"},{"name":"@paralleldrive/cuid2","description":"[![aidd Framework](https://img.shields.io/badge/✨_aidd_Framework-black)](https://github.com/paralleldrive/aidd)[![Parallel Drive](https://img.shields.io/badge/🖤_Parallel_Drive-000000?style=flat)](https://paralleldrive.com)","version":"3.3.0"},{"name":"mcp-framework","description":"Framework for building Model Context Protocol (MCP) servers in Typescript","version":"0.2.18"}],"pypi":[{"name":"loops","version":"2.1.1","description":"a simple printed nested loop"}],"cli":true,"sdks":["Node (eslint-plugin-no-loops)","Python (loops)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Absence of an OpenAPI specification and MCP server prevents automatic agent integration and forces agents to rely on SDK documentation for endpoint discovery and schema inference.","agentSummary":"Loops.so provides solid programmatic access via REST API, JavaScript SDK, and CLI with API key authentication, making it reasonably usable for agents, but lacks an OpenAPI spec, MCP server, webhook support, and documented safety features that would enable more robust autonomous operation."}},{"_id":"69b2da6867df398baec12edf","name":"Brevo","slug":"brevo","url":"https://brevo.com","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Brevo offers a REST API with standard query parameters and filtering capabilities, but without an OpenAPI spec or documented field selection options, token efficiency cannot be verified; pagination support is assumed standard for email/CRM APIs but not confirmed.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Brevo provides a REST API with official Node.js SDK (@getbrevo/brevo v5.0.1) and multiple community integrations (Nodemailer transport, Strapi provider), but lacks GraphQL, CLI, or MCP server support, limiting access method diversity.","na":false},"auth":{"score":8,"confidence":"scanner","evidence":"API key-based authentication enables autonomous agent access without human-in-the-loop OAuth flows; standard for email/marketing APIs and suitable for agent operations, though scoped permission details are not visible in collected signals.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"No rate limit documentation, response time data, or conditional request support (ETags) visible in signals; typical SaaS API performance is assumed but cannot be confirmed without direct testing.","na":false},"discoverability":{"score":4,"confidence":"scanner","evidence":"Homepage returns 404, no OpenAPI spec found, no .llms.txt or structured documentation signals detected, and no developer-facing documentation links visible in homepage analysis; discoverability is significantly hampered.","na":false},"reliability":{"score":5,"confidence":"scanner","evidence":"No API versioning, idempotency key support, or status page information visible in signals; standard enterprise email API practices are likely present but cannot be confirmed from available data.","na":false},"safety":{"score":6,"confidence":"scanner","evidence":"API key scoping and standard test/production environment separation (typical for email platforms) are assumed, but no explicit dry-run, sandbox mode, or undo operation documentation is evident from collected signals.","na":false},"reactivity":{"score":4,"confidence":"scanner","evidence":"No webhook, streaming, SSE, or real-time notification mechanisms visible in signals; email marketing platforms typically rely on polling-based integration patterns rather than reactive updates.","na":false}},"agentGrade":"B","agentScore":6.08,"accessMethods":{"restApi":false,"graphql":false,"cli":false,"sdk":["Node (@getbrevo/brevo)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":25,"badgeEmbedCount":3,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.722Z","updatedAt":"2026-04-02T02:25:32.952Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:39:30.519Z","scanVersion":1,"rawSignals":{"homepage":{"status":404,"contentLength":107,"hasStructuredData":false,"hasDeveloperDocs":false,"hasAgentMentions":false,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":false}},"packages":{"npm":[{"name":"@getbrevo/brevo","description":"Brevo SDK for Node.js with TypeScript support.","version":"5.0.1"},{"name":"nodemailer-brevo-transport","description":"Nodemailer Transport Module for Brevo","version":"2.2.1"},{"name":"@groupcards/brevo","description":"NodeJS client for @getbrevo/brevo","version":"2.2.1"},{"name":"strapi-provider-email-brevo","description":"Brevo (former Sendinblue) provider for strapi email","version":"1.0.4"},{"name":"@kb0912/notification-brevo","description":"Sending email notification using Brevo.","version":"2.1.1"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"},{"name":"mcp-framework","description":"Framework for building Model Context Protocol (MCP) servers in Typescript","version":"0.2.18"},{"name":"@modelcontextprotocol/sdk","description":"Model Context Protocol implementation for TypeScript","version":"1.27.1"}],"pypi":[],"cli":false,"sdks":["Node (@getbrevo/brevo)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"The homepage 404 error combined with missing OpenAPI specification, no MCP server, and absence of discoverable developer documentation makes it difficult for agents to independently understand and integrate with Brevo's API surface.","agentSummary":"Brevo is moderately agent-ready with a stable REST API and Node.js SDK enabling autonomous authentication and basic operations, but lacks modern discoverability infrastructure (OpenAPI, .llms.txt) and specialized agent protocols (MCP) that would streamline integration. The platform would benefit significantly from publishing API documentation, OpenAPI specs, and an MCP server to improve agent usability."}},{"_id":"69b2da6867df398baec12ed9","name":"Buttondown","slug":"buttondown","url":"https://buttondown.email","description":"","logo":"","category":"Email","tags":[],"pricingModel":"unknown","scores":{"tokenEfficiency":{"score":6,"confidence":"scanner","evidence":"Buttondown offers a REST API with standard pagination and filtering capabilities, but lack of visible field selection or GraphQL alternative suggests moderate token efficiency with room for optimization.","na":false},"access":{"score":7,"confidence":"scanner","evidence":"Multiple access methods available including REST API, Node.js SDK, CLI tool, and an MCP server package (buttondown-mcp), providing good programmatic access breadth though official MCP server integration is unclear.","na":false},"auth":{"score":7,"confidence":"scanner","evidence":"API key authentication is supported (inferred from SDK and API patterns), enabling autonomous agent authentication without OAuth friction, though specific scoping details are not documented in collected signals.","na":false},"speed":{"score":6,"confidence":"scanner","evidence":"Standard REST API without documented rate limits, conditional request support (ETags), or batch endpoints visible; response time data not collected suggests potential latency concerns.","na":false},"discoverability":{"score":5,"confidence":"scanner","evidence":"No OpenAPI spec found and no llms.txt or agents.json files present, but developer documentation exists and the API appears to follow REST conventions; discovery could be significantly improved with machine-readable specifications.","na":false},"reliability":{"score":6,"confidence":"scanner","evidence":"Standard API patterns suggest basic reliability, but no visible documentation of idempotency keys, API versioning strategy, or status page in collected signals limits confidence.","na":false},"safety":{"score":5,"confidence":"scanner","evidence":"No evidence of sandbox/test mode, dry-run capabilities, or explicit scoped access tokens in the collected data; typical SaaS provider patterns likely exist but are not confirmed.","na":false},"reactivity":{"score":3,"confidence":"scanner","evidence":"No webhooks, streaming, SSE, or event-based functionality is evident in collected signals; agents would be limited to polling for updates.","na":false}},"agentGrade":"B","agentScore":6.02,"accessMethods":{"restApi":true,"graphql":false,"cli":true,"sdk":["Node (buttondown)"],"mcpServer":"none","openApiSpec":"","llmsTxt":false,"agentsJson":false},"authInfo":{"methods":["unknown"],"scopedPermissions":false,"humanRequired":true},"reviewCount":0,"avgReviewScore":0,"viewCount":25,"badgeEmbedCount":4,"agentSkillSlugs":[],"alternatives":[],"claimed":false,"status":"graded","createdAt":"2026-03-12T15:23:20.718Z","updatedAt":"2026-04-02T05:41:46.353Z","__v":0,"scannerData":{"lastScannedAt":"2026-03-12T19:39:11.917Z","scanVersion":1,"rawSignals":{"homepage":{"status":200,"contentLength":103334,"hasStructuredData":true,"hasDeveloperDocs":true,"hasAgentMentions":false,"responseTimeMs":null},"openapi":{"found":false},"wellKnown":{"llmsTxt":{"found":false},"agentsJson":{"found":false},"robotsTxt":{"found":true,"blocksAgents":true,"hasSitemap":true}},"packages":{"npm":[{"name":"buttondown-mcp","description":"MCP server for Buttondown email newsletter API","version":"1.2.0"},{"name":"buttondown","description":"JavaScript (Node.js) Buttondown API wrapper.","version":"1.1.2"},{"name":"@tryghost/mg-buttondown","description":"Converts a Buttondown export and generates a `zip` file you can import into a Ghost installation.","version":"0.1.5"},{"name":"@buttondown/cli","description":"CLI for Buttondown to sync emails and media with a local folder","version":"1.0.9"},{"name":"gridsome-source-buttondown","description":"Buttondown source for Gridsome","version":"1.0.0"},{"name":"firebase-tools","description":"Command-Line Interface for Firebase","version":"15.9.1"},{"name":"@playwright/mcp","description":"Playwright Tools for MCP","version":"0.0.68"},{"name":"mcp-framework","description":"Framework for building Model Context Protocol (MCP) servers in Typescript","version":"0.2.18"},{"name":"@modelcontextprotocol/sdk","description":"Model Context Protocol implementation for TypeScript","version":"1.27.1"},{"name":"@mcp-use/cli","description":"The mcp-use CLI is a tool for building and deploying MCP servers with support for ChatGPT Apps, Code Mode, OAuth, Notifications, Sampling, Observability and more.","version":"2.18.3"}],"pypi":[],"cli":true,"sdks":["Node (buttondown)"]},"mcp":{"found":false,"type":"none","servers":[]}},"biggestFriction":"Lack of OpenAPI specification and machine-readable API documentation (no llms.txt or agents.json) forces agents to rely on reverse-engineered API patterns or manual documentation review.","agentSummary":"Buttondown is moderately agent-ready with multiple programmatic access methods (REST API, SDK, CLI, MCP server) and API key authentication, but lacks critical discoverability mechanisms and event-driven capabilities. The absence of OpenAPI specs and webhook support limits autonomous integration and real-time responsiveness."}}]}