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Send email

AgentMail

Email API that gives AI agents their own inboxes to send, receive and thread messages, with webhooks and an MCP server.

At a glance

Provider
AgentMail
Category
Send email
Type
Hosted API
Pricing model
Monthly or yearly plans (Free, Developer, Startup, Enterprise) with paid add-ons1
Free tier
3 inboxes, 3,000 emails a month (100 a day), 3 GB storage, no card1
Authentication
API key as bearer token; OAuth for the MCP server6
Connect via
REST API, MCP server, SDKs (Python, TypeScript), CLI, IMAP/SMTP, WebSockets, webhooks2
Read from the provider's pages
2026-11-04
Pricing
  • Pricing model: Subscription plans billed monthly or yearly; add-ons for inboxes, domains, monthly sends and seats
  • Free tier: 3 inboxes, 3,000 emails a month, 100 a day, 3 GB storage
  • Free tier (other page): 3 inboxes, 100 emails a day, no monthly cap
Pricing in full →Tools
  • Official MCP server: Yes, remote
  • Address or package: https://mcp.agentmail.to/mcp; stdio bridge on npm and PyPI for clients without remote support
  • Tool count: 53 tools in the manifest
Tools in full →Authentication
  • Who creates the account: A person can sign up in the Console, or an agent can sign itself up through the Agent API
  • Where to get a key: console.agentmail.to, API Keys section; shown once
  • Other requirements: Unverified agent sign-ups can send only to the attached human until a 6-digit OTP is verified; custom domains need DNS records
Authentication in full →Setup
  • REST API: https://api.agentmail.to (EU: https://api.agentmail.eu)
  • MCP server: https://mcp.agentmail.to/mcp
  • OpenAPI spec: https://docs.agentmail.to/openapi.json (YAML at /openapi.yaml)
Setup in full →Limits
  • API rate limit: Per organization; numbers not published; over the limit returns 429 with a Retry-After header
  • Emails per day: Free 100, Developer 1,000, Startup 15,000
  • Emails per month: Free 3,000, Developer 10,000, Startup no separate cap
Limits in full →Privacy
  • Data location: Separate US and EU environments; EU region listed under Enterprise
  • Retention: Kept as long as needed for the purposes collected, or while the service is used; no fixed period published
  • Used for training: Yes for Email Content unless a written agreement says otherwise
Privacy in full →

Read from AgentMail’s own pages on 2026-11-04. Every number links to the page a value came from. For agents, the same facts as markdown: /tools/send-email/agentmail.md