email-api

Open-source, self-hosted newsletter, email marketing and transactional email platform. Visual MJML editor, Liquid templating, 7 sending providers.

Find existing email addresses by nickname using API/SMTP checking methods without user notification. Please, don't hesitate to improve cat's job! 🐱🔎 📬

Cloudflare Worker that acts as a temporary email inbox

Self-hosted email sending platform built on Cloudflare Email Sending — REST API, admin UI, templates, domain management, scoped API keys, all in one Docker container.

Open-source email API for applications and AI agents. Managed hosting at e2a.dev, or self-host with Docker.

One simple SDK for transactional email across 23 adapters

Enterprise project tracker, tracks commits done by employees after getting assigned to a couple of projects by their managers

SDK, skills, and examples for Inkbox: give AI agents a persistent identity with email, phone number, and internet address

The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.

Example AI agents using AgentMail — hiring screener, legal intake, receipt parser, contract redline, and more.

Official mailtrap.io MCP server

Open-source transactional email API and self-hostable Resend alternative. SMTP, inbound mail, webhooks, and campaigns for developers.

Official PHP SDK for the Elastic Email REST API v4. Send transactional and marketing emails, and manage contacts, lists, templates, campaigns, domains and webhooks. Available on Packagist.

The most complete Mailchimp Marketing API MCP server: 227 tools across campaigns, audiences, reports, segments, automations and full e-commerce, with multi-account support and runtime-security guardrails (read-only, dry-run, audit, per-tool risk metadata).

Official Node.js, Python, and Go SDKs plus the primitive CLI for Primitive — email infrastructure for AI agents. Generated from the OpenAPI spec.

An inbound-only mail server and REST API

CLI and MCP server for smbCloud: smbCloud Mail, smbCloud Auth, smbCloud Deploy, and PGresIQ. One Rust binary.

Agent-native disposable email — Cloudflare Workers + Durable Objects, with CLI & MCP. https://smails.dev

Official Go SDK for the Elastic Email REST API v4. Send transactional and marketing emails, and manage contacts, lists, templates, campaigns, domains and webhooks. Available on pkg.go.dev.

An open-source alternative to Resend using your own infrastructure!