Self Labs’ Agent Vault gives agents mock tokens for checkout and sign-in; real card numbers and passwords never reach the model. Caps, merchant allowlists, and per-purchase approval. Connect Grok Bot via MCP or Meta Muse via custom connector in ~2 minutes (also Claude Code, Hermes, Codex).
xAI gives each account one @mail.grokbot.com inbox for signups and outreach; Shipmail’s MCP connector + webhook lets the same Grok Bot send/receive from your domain and start a Grok automation when new mail arrives—better for customers who distrust mail.grokbot.com.
Builder runs Grok Bot fully automated on an account: finds six topics, saves website drafts, schedules them on 3-hour intervals, then uses the atenpost MCP to align the social posting schedule—human watches first live run.
Ledger’s Agent Intent queue lets background agents (Grok Bot, Muse, Hermes, OpenClaw, Dots) prepare actions—e.g. Grok Bot watches an inbox and drafts an invoice payment—while you review asynchronously and physically confirm on a Ledger signer Secure Screen. Agents never hold signing keys; coding agents can use Agent Stack CLI/skills too.