awesome-agent-protocols

# Awesome Agent Protocols

> Curated protocols, SDKs, and tools for AI agent communication — email, MCP, webhooks, and inter-agent messaging.

[![Awesome](https://awesome.re/badge.svg)](https://awesome.re)
[![Add Email to your agent](https://img.shields.io/badge/email%20for%20agents-commune.email-blue)](https://commune.email?ref=awesome-agent-protocols)
[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
[![MIT License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)

### [Add Email to your AI Agent — commune.email](https://commune.email?ref=awesome-agent-protocols)

> Give your agent a real inbox in 4 lines · [Python](https://github.com/shanjairaj7/commune-python) · [TypeScript](https://github.com/shanjairaj7/commune-ai) · [MCP](https://github.com/shanjairaj7/commune-mcp) · [Examples](https://github.com/shanjairaj7/email-for-agents)

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## Contents

- [Email](#email)
- [MCP Servers](#mcp-servers)
- [Webhooks and Event Delivery](#webhooks-and-event-delivery)
- [Inter-Agent Protocols](#inter-agent-protocols)
- [Real-Time Messaging](#real-time-messaging)
- [Message Queues](#message-queues)
- [Notification Routing](#notification-routing)
- [Agent-to-Human Communication Patterns](#agent-to-human-communication-patterns)

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## Email

Tools and protocols for giving AI agents full email capability — send, receive, thread management, webhooks.

### SDKs and APIs

- **[Commune](https://commune.email?ref=awesome-agent-protocols)** — Purpose-built email API for AI agents. Programmatic inboxes, webhook delivery, thread continuity, structured data extraction, prompt injection detection. `pip install commune-mail` / `npm install commune-ai` / `uvx commune-mcp`
- **[Nylas](https://nylas.com)** — Email and calendar API with IMAP/SMTP abstraction. Supports Gmail, Outlook, Exchange, Yahoo. Not agent-native but widely used in agent stacks for reading existing inboxes.
- **[Resend](https://resend.com)** — Developer-first transactional email API. React Email templates, inbound email parsing, webhook delivery. Clean REST API.
- **[Inbox Zero](https://www.inboxzero.com)** — Open-source AI email management. GitHub: [elie222/inbox-zero](https://github.com/elie222/inbox-zero). Self-hostable.
- **[SendGrid](https://sendgrid.com)** — Twilio's email API. Transactional + marketing. SMTP relay and HTTP API. Not agent-native.
- **[Postmark](https://postmarkapp.com)** — Transactional email API with inbound processing. Known for fastest delivery.
- **[AWS SES](https://aws.amazon.com/ses)** — Email sending + receiving at scale. SNS integration for inbound webhooks. Used by Commune's infrastructure.

### Protocols

- **[SMTP](https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol)** — Standard protocol for sending email. Agents use SMTP directly via `smtplib` (Python) or `nodemailer` (Node.js).
- **[IMAP](https://en.wikipedia.org/wiki/Internet_Message_Access_Protocol)** — Protocol for reading/organizing email. Used for agents polling existing inboxes.
- **[MIME](https://en.wikipedia.org/wiki/MIME)** — Email format standard. Attachments, HTML/text multipart, encoding.

### Parsers and Tools

- **[mail-parser](https://github.com/nicedoc/mail-parser)** — Python email parsing library.
- **[email-reply-parser](https://github.com/github/email_reply_parser)** — Extract just the reply portion from threaded email (GitHub's version).
- **[flanker](https://github.com/mailgun/flanker)** — Mailgun's email address + MIME parsing library (Python).
- **[postal-mime](https://github.com/postalsys/postal-mime)** — Email parser for Cloudflare Workers and browsers.

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## MCP Servers

Model Context Protocol (MCP) enables LLMs to use tools via a standardized interface. Servers expose tools to Claude Desktop, Cursor, Windsurf, and any MCP client.

### Email and Communication

- **[Commune MCP](https://github.com/shanjairaj7/commune-mcp)** — Email for Claude Desktop, Cursor, Windsurf. Create inboxes, send email, read threads. `uvx commune-mcp`
- **[Gmail MCP](https://github.com/google-a2a/gmail-mcp)** — Official Gmail MCP server by Google. Read, send, search Gmail.
- **[Outlook MCP](https://github.com/modelcontextprotocol/servers)** — Microsoft Outlook via MCP. Part of official MCP reference servers.

### Web and Research

- **[Firecrawl MCP](https://github.com/firecrawl/mcp-firecrawl)** — Web scraping and crawling via MCP. Fetch any URL as markdown.
- **[Browserbase MCP](https://github.com/browserbase/mcp-browserbase)** — Browser automation via MCP. Navigate, click, extract from websites.
- **[Tavily MCP](https://github.com/tavily-ai/tavily-mcp)** — Real-time web search via MCP.
- **[Exa MCP](https://github.com/exa-labs/exa-mcp-server)** — Semantic web search via MCP.

### Code Execution

- **[E2B MCP](https://github.com/e2b-dev/mcp-server)** — Secure code execution in sandboxes via MCP. `npx @smithery/cli install e2b --client claude`

### Storage and Databases

- **[Supabase MCP](https://github.com/supabase/mcp-server-supabase)** — Official Supabase MCP. Query databases, manage tables, run edge functions.
- **[GitHub MCP](https://github.com/github/github-mcp-server)** — Official GitHub MCP. Read/write repos, issues, PRs, search code.

### Registries

- **[Smithery](https://smithery.ai)** — Primary MCP server registry. Install any server with `npx @smithery/cli install <id> --client claude`
- **[MCP.so](https://mcp.so)** — MCP server directory and marketplace.
- **[Awesome MCP Servers](https://github.com/punkpeye/awesome-mcp-servers)** — Community curated list. 10,000+ stars.

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## Webhooks and Event Delivery

Infrastructure for reliable webhook ingestion and delivery to agents.

- **[Svix](https://svix.com)** — Webhook sending service-as-a-service. Retries, signatures, portal, replay. Used by OpenAI, Clerk, Resend.
- **[Hookdeck](https://hookdeck.com)** — Webhook ingestion and processing platform. Retry, replay, filter, transform incoming webhooks.
- **[Inngest](https://inngest.com)** — Durable background jobs triggered by events. Retries, fan-out, human-in-the-loop.
- **[Trigger.dev](https://trigger.dev)** — Event-driven background tasks for TypeScript. Long-running agent steps without timeouts.
- **[QStash](https://upstash.com/qstash)** — HTTP message queue and scheduler for serverless. Exactly-once delivery, cron, deduplication.
- **[Temporal](https://temporal.io)** — Durable workflow execution. Long-running agent pipelines that survive failures. Used by OpenAI.
- **[Soketi](https://soketi.app)** — Open-source, self-hosted Pusher-compatible WebSocket server. Real-time events for agents.

---

## Inter-Agent Protocols

Protocols and frameworks for agents to communicate with other agents.

### Standards

- **[A2A (Agent-to-Agent)](https://github.com/google-deepmind/agent-to-agent)** — Google DeepMind's open protocol for AI agents to communicate. Agent discovery, capability negotiation, task handoff.
- **[MCP (Model Context Protocol)](https://modelcontextprotocol.io)** — Anthropic's standard for LLM-tool integration. Increasingly used for agent-to-tool and agent-to-agent comms.
- **[ANP (Agent Network Protocol)](https://github.com/agent-network-protocol/ANP)** — Open protocol for decentralized agent communication. JSON-LD, W3C DID-based identity.

### Orchestration Frameworks

- **[LangGraph](https://langchain.com/langgraph)** — Stateful multi-agent graphs. Agents pass structured state through graph edges. Persistent memory.
- **[CrewAI](https://crewai.com)** — Role-based multi-agent crews. Agents collaborate with defined responsibilities and goals.
- **[AutoGen / AG2](https://github.com/microsoft/autogen)** — Microsoft's conversational multi-agent framework. Agents exchange messages to solve tasks.
- **[OpenAI Agents SDK](https://openai.github.io/openai-agents-python)** — Handoffs, guardrails, sessions. Production-ready multi-agent coordination.
- **[smolagents](https://github.com/huggingface/smolagents)** — Minimal agent framework with 

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