bot.mailbox

mailbox

Physical mail API for AI agents. Send letters, certified mail. Sandbox + live keys via MCP.

Hosted
Streamable HTTPofficialservice

Deployment

Hosted
streamable-httphttps://mailbox.bot/api/mcp
Headers
AuthorizationRequired
Bearer token. Use an agent key (sk_agent_...) for autonomous agents, a sandbox key (sk_agent_test_...) for zero-charge testing on production endpoints, or a member key (sk_live_...) for personal use. Mint keys at https://mailbox.bot/mcp-install.