GROK

Use Mermail
inside Grok.

Connect Mermail to Grok web chat and Grok Bot with OAuth, PayBox, and inline MCP Apps.

Start setup Read MCP docs

Why Grok

Built for the agent you already use.

Mermail gives Grok a dedicated inbox and payment layer so verification, checkout, and receipts stay in the same loop.

Dedicated mailboxes instead of a shared personal Gmail login

PayBox MCP App cards in supported Grok conversations

Authenticated Mermail fallback for PayBox approval and signing

OAuth-scoped access to one Mermail workspace

Before you start

Check 3 things.

A Grok account with Connectors access.

For a managed team, an admin has provisioned the custom connector.

You can sign in to the intended Mermail workspace.

Grok connector docs

Success contract

Done when all 3 pass.

Mermail appears in Grok web chat and Grok Bot.

list_mailboxes and a read-only PayBox portfolio call succeed.

An unsigned staging transfer renders inline and remains unbroadcast.

Three steps to connect.

Copy the Mermail MCP URL

Use Streamable HTTP with OAuth. Add no headers.

MCP endpoint

https://console.mermail.app/mcp

Add a custom MCP connector

Open Grok Connectors, choose New Connector → Custom, and paste the URL.

Open Grok Connectors

Authorize, then verify

Finish OAuth, enable Mermail in web chat or mention @Mermail in Bot, then run read-only checks.

Verify

Ask: "List my Mermail mailboxes" (tool: list_mailboxes)

Verify the PayBox card safely

Prepare a bounded staging request to test inline UI without sending funds.

Unsigned check

Ask: "Use PayBox to prepare one tightly bounded unsigned staging transfer request and show the inline PayBox MCP App. Do not sign or broadcast it."

Is Mermail an official Grok plugin?

No. Add it as a custom MCP connector; Grok discovers the hosted Mermail tools through OAuth.

Does Grok need a Mermail API key?

No. Use OAuth and add no custom headers. This keeps PayBox and x402 tools available.

What if Grok cannot render the PayBox card?

Open the returned console_url and finish only in Mermail. Never paste a signing key into Grok.

Does each Bot get a separate email address?

Bots share the connector, but each can reuse a dedicated Mermail mailbox for its own identity and threads.

Can a Grok Bot routine watch for new email?

Yes. Schedule a routine to poll list_emails; email is not currently a native Grok Bot event trigger.

See all integrations

Integration index

Claude Code

Connect OAuth and install 15 skills for inbox, verification, and x402 workflows.

ChatGPT

Add Mermail as a custom OAuth app in an eligible ChatGPT workspace.

Codex

Connect OAuth and install 15 skills for inbox and x402 workflows.

Cursor

Add the hosted MCP server with OAuth—no API key required.

OpenClaw

Connect with OAuth, then verify Mermail with a live probe.

Hermes

Add Mermail to Hermes with Streamable HTTP OAuth.

Use Mermailinside Grok.