# send0 docs

> Email inboxes for AI agents. Full docs: https://send0.dev/docs/llms-full.txt

# send0


- **Get started**
- [send0 documentation](https://send0.dev/docs/): Give any agent a real email inbox in one API call. It can send, receive, thread replies and wait for codes.
- [What is send0?](https://send0.dev/docs/what-is-send0): An email API where the inbox is the main object, built for software agents.

- **Quickstart**
- [TypeScript quickstart](https://send0.dev/docs/quickstart/typescript): Create an inbox, wait for a verification email, and reply in the same thread.
- [MCP quickstart](https://send0.dev/docs/quickstart/mcp): Give Claude Code, Claude Desktop, Cursor or any MCP client its own inbox.
- [cURL quickstart](https://send0.dev/docs/quickstart/curl): The same flow with plain HTTP. Works from any language.
- [API keys](https://send0.dev/docs/api-keys): Live and test keys, scopes, and keys limited to specific inboxes.

- **Integrations**
- [Agent frameworks](https://send0.dev/docs/integrations): send0's tools for the Vercel AI SDK, LangChain.js, LangChain for Python and MCP.
- [Vercel AI SDK](https://send0.dev/docs/integrations/vercel-ai-sdk): @send0/ai-sdk: give an AI SDK agent its own email inbox.
- [LangChain.js](https://send0.dev/docs/integrations/langchain-js): @send0/langchain: send0 tools for LangChain.js agents and LangGraph.
- [LangChain for Python](https://send0.dev/docs/integrations/langchain-python): langchain-send0: a send0 toolkit for LangChain and LangGraph agents.

- **Concepts**
- [Inboxes](https://send0.dev/docs/concepts/inboxes): Addresses, plus-addressing, send policies and lifecycle.
- [Messages & threads](https://send0.dev/docs/concepts/messages-and-threads): What send0 extracts from every message, and how conversations are grouped.
- [Waiting for email](https://send0.dev/docs/concepts/waiting): Block until the email you need arrives, with the code already extracted.
- [Sending & replies](https://send0.dev/docs/concepts/sending): Send, reply and forward, and the rules that keep send0 mail landing in inboxes.
- [Drafts & approval](https://send0.dev/docs/concepts/drafts): Let agents write mail and have a person approve it before it goes out.

- **Real-time**
- [Webhooks](https://send0.dev/docs/realtime/webhooks): Signed HTTPS POSTs for new mail, deliveries, bounces and more. Available on every plan.
- [Event stream](https://send0.dev/docs/realtime/events-stream): Live events over Server-Sent Events, with resume, for one inbox or the whole account.

- **Guides**
- [Sign up for a service](https://send0.dev/docs/guides/agent-signup): The complete pattern for an agent that registers somewhere and confirms its email.
- [Prompt-injection safety](https://send0.dev/docs/guides/prompt-injection): Inbound email is untrusted input. Here's how send0 helps, and what your agent should do.
- [Deliverability](https://send0.dev/docs/guides/deliverability): How send0 keeps mail out of spam, and how you can help.

- **Self-hosting**
- [Self-hosting overview](https://send0.dev/docs/self-hosting): Run send0 on your own servers and your own domain, with Docker Compose or one Cloudflare Worker.
- [Docker Compose](https://send0.dev/docs/self-hosting/docker): Run Postgres, send0 and Caddy on one server, with mail on your own domain.
- [Deploy to Cloudflare](https://send0.dev/docs/self-hosting/cloudflare): Run all of send0 in one Worker on your own Cloudflare account, with your Postgres and Amazon SES.
- [Configuration reference](https://send0.dev/docs/self-hosting/configuration): Every setting for the Docker and Cloudflare editions, with defaults and rules.
- [Mail setup and deliverability](https://send0.dev/docs/self-hosting/email-setup): DNS, port 25, inbound authentication, relays, SES and SMTP_URL for a self-hosted send0.
- [Upgrades, backups and troubleshooting](https://send0.dev/docs/self-hosting/operations): Keep a self-hosted send0 current, backed up, secure and working.

- **Reference**
- [Errors & limits](https://send0.dev/docs/reference/errors): Error format and codes, idempotency, pagination and limits.
- [TypeScript SDK](https://send0.dev/docs/reference/typescript-sdk): @send0/sdk: every method, plus configuration, errors, retries and pagination.
- [Python SDK](https://send0.dev/docs/reference/python-sdk): send0 on PyPI: sync and async clients with typed models.
- [MCP tools](https://send0.dev/docs/reference/mcp-tools): @send0/mcp: the tools, their arguments, and configuration.
- [REST API](https://send0.dev/docs/reference/api): Endpoints, authentication and the OpenAPI 3.1 spec.

- **More**
- [Docs for LLMs](https://send0.dev/docs/for-llms): Plain-text versions of these docs for coding assistants and agents.