CAI.com — a custodial @cai.com email, multi-chain stablecoin wallet, and MCP-installable agent API

CAI.com launched a custodial email service with a multi-chain stablecoin wallet, credential vault, and an MCP-installable agent API. The platform provides a free @cai.com email address and enables agents to interact with CAI's API through a single command installation. The agent API supports MCP-compatible hosts like OpenClaw, Hermes, Codex, and Cursor.

A custodial email, a stablecoin wallet, a credential vault, and an agent-ready API — all at one @cai.com address. This post walks through what CAI is, what you get when you sign up, and how to wire the agent side into any MCP-compatible host. A free @cai.com email comes with four product surfaces, all under one account: @cai.com . cai.com/capabilities.html . pay and full scopes may require verification. The key is in the account dashboard.The signup at cai.com/app is four steps. About 2 minutes. cai.com/app . Pick "Apply for @cai.com email."At the end you have: @cai.com email address.No card. The email is free. For the technical reader, the agent side is the reason to look at CAI. The install is one command: npm i -g @cailab/mcp The package is the MCP server — a thin wrapper around the CAI HTTPS Edge API at https://api.cai.com/functions/v1 . It drops into MCP-compatible hosts including OpenClaw, Hermes, Codex, and Cursor see cai.com/developers.html for the current host list . Once installed, the agent can call GET /get-identity , POST /get-wallet-balances , POST /wallet-custodial-transfer , and the rest of the CAI surface — without the user pasting a private key in chat. The contract an agent reads first is cai.com/skill.md . It's the canonical source-of-truth for what CAI can do, written in a format agents parse. The companion artifact is the A2A Agent Card at cai.com/.well-known/agent.json — that's how agents discover CAI in agent-to-agent registries. Comment below with: Every comment on this article gets read. Bug reports will be replied to within 24 hours. Friction points shape what we document next. Documentation: cai.com/skill.md · cai.com/developers.html · cai.com/app to sign up.