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SentFromAI gives your AI agents a real email address. Create inboxes on demand, send and receive mail, follow conversations as threads, and react to incoming email in real time over webhooks — all from one clean API (or natively as agent tools over MCP).

Quickstart

Create an inbox and send your first email in under five minutes.

Authentication

API keys, the base URL, and how requests are authenticated.

Receiving email

Get inbound mail and delivery events delivered to your endpoint.

API reference

Every endpoint, request, and response.

MCP server

npx -y sentfromai-mcp — email as 21 native tools in any MCP-capable agent.

Agent frameworks

Recipes for OpenClaw, LangChain, CrewAI, Vercel AI SDK, and more.

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What you can build

  • Support & sales agents that own an inbox, triage incoming mail, and reply in-thread.
  • Per-user inboxes — spin up a fresh address for every customer, task, or workflow.
  • Transactional senders — invoices, receipts, alerts, with deliverability handled for you.
  • Anything that reads or writes email, without standing up SMTP/IMAP or managing reputation.

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How it works

1

Create an inbox

POST /inboxes returns an address like support-bot@mail.sentfrom.ai — ready to send and receive immediately on the shared domain.
2

Send & receive

Send with POST /messages. Inbound mail is parsed, threaded, and POSTed to your webhook (or polled via GET /messages).
3

Stay in thread

Replies and forwards keep correct In-Reply-To/References headers, so conversations thread cleanly in every mail client.

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Deliverability, handled

Every SentFromAI domain ships with SPF, DKIM, and DMARC configured, automatic bounce/complaint suppression, and reputation isolation on higher plans. You focus on the agent; we keep the mail landing in the inbox.
Base URL: https://api.sentfrom.ai/v1. All requests use a Bearer API key — see Authentication.