Proof Inbox MCP
Public listing for Proof Inbox: prepaid email-verify credits for MCP agents (Grok Bot, Cursor, Claude, and any Streamable HTTP client).
- Install: https://proofinbox.com/connect
- Grok Bot form: https://proofinbox.com/grok-bot
- MCP: https://mcp.proofinbox.com/mcp
- Registry:
com.proofinbox/verify - Smithery: https://smithery.ai/servers/proofinbox/verify
- cursor.directory: https://cursor.directory/plugins/proof-inbox
- Checkout: https://proofinbox.com/buy/verify-500 — $9 / 500 credits
The product app stays in a private repo. This repo exists so directories that scrape GitHub can find the hosted MCP.
Any MCP client
Point a Streamable HTTP client at https://mcp.proofinbox.com/mcp.
URL: https://mcp.proofinbox.com/mcp
Headers: Authorization: Bearer <workspace_token>
Get the token from checkout. Reuse it. Never invent one.
Grok Bot
Settings → Plugins → add a custom MCP server (not the Marketplace catalog).
Name: Proof Inbox
URL: https://mcp.proofinbox.com/mcp
Headers: Authorization: Bearer <workspace_token>
Get the token from checkout. Reuse it. Never invent one.
Tools
balance— tank check. Costs 0.verify_email— fresh check costs 1. Cache (30 days), syntax, and vendorunknowncost 0.receipts— checkout session id. Do not invent it.
On payment_required, open the returned checkout_url.
Directories
- Smithery — live as
proofinbox/verify - cursor.directory — live as
proof-inbox