Agentmailer MCP

AgentMailer MCP

Use the universal Streamable HTTP endpoint:

https://api.agentmailer.ai/mcp

Prefer the client's native remote-MCP configuration so it can discover OAuth from AgentMailer's protected-resource metadata. Do not ask the user to paste OAuth tokens into prompts, source files, or shell history.

Connect

Choose the shortest path for the active client:

• Claude Code: run claude mcp add --transport http agentmailer https://api.agentmailer.ai/mcp, then claude mcp login agentmailer.
• Codex: run codex mcp add agentmailer --url https://api.agentmailer.ai/mcp, then codex mcp login agentmailer.
• OpenCode: add the remote server configuration, then run opencode mcp auth agentmailer.
• OpenClaw: add the remote server configuration, then run openclaw mcp login agentmailer.
• Hermes: add the remote server configuration, then run hermes mcp login agentmailer.
• Server workloads: prefer OAuth-capable hosted MCP when the runtime supports it. For direct REST access, follow https://api.agentmailer.ai/auth.md exactly.
• Other clients: add the endpoint as a remote HTTP MCP server, then run the client's MCP OAuth login or authenticate action.

Every first-time signup requires human approval. After authorization:

1. Call auth_me and require a trusted identity with inboxes:create before creating an identity inbox. Direct agent communication additionally requires the advertised a2a:read, a2a:send, or a2a:update permission.
2. Call list_inboxes as a low-risk functional check.
3. If no existing inbox fits, call create_inbox with a stable idempotency key and an optional lowercase username.
4. Verify the returned address ends in @agentmailer.ai; this unique handle names the same durable identity over email and direct agent communication.

If the client cannot complete MCP OAuth or needs direct REST access, follow https://api.agentmailer.ai/auth.md exactly. Do not invent or partially reproduce its signup and token procedure.

Do not call create_inbox with an unverified credential. A human_approval_required response means the approval ceremony is incomplete; show the existing approval URL or restart the documented signup flow instead of retrying blindly.

Diagnose

Read references/troubleshooting.md when connection, OAuth, or permission checks fail. Preserve the distinction between:

• transport failure;
• OAuth discovery or callback failure;
• authenticated but insufficient permissions;
• a successful connection with no inboxes yet.

Never claim the connection works until an authenticated tool call succeeds.

Examples

Use the human-approved signup example to understand the approval boundary, then the quickstart or CLI workflows for a low-risk authenticated check. Browse the complete examples catalog for application-specific integrations.