Proof Inbox
Checkout plus MCP tools: verify_email, balance, and receipts. Money moves on the checkout page. Credits change only in the ledger.
https://proofinbox.com/Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
Connect straight to this server’s public endpoint.
https://www.proofinbox.com/mcpWe add this server to your workspace, then open Studio — saved access, one connection to many servers, with a history of what ran.
Last probed Sep 14, 2026 · www.proofinbox.com
3tools discovered
Balance
Read-only verify credit balance for a workspace. Call this before a batch. Does not burn credits.
Verify email
Verify one email. Cached repeats within 30 days are free. If credits are 0, returns payment_required with a checkout_url. Never invent results. unknown means the check did not finish.
Receipts
List proof of spend and proof of checks for this workspace. Use this when the human asks what a charge paid for. Do not invent checkout session ids.
Get your MCP into directories
A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsCheckout plus MCP tools: verify_email, balance, and receipts. Money moves on the checkout page. Credits change only in the ledger.
Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.
MCPBundles probed 3 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.
Operate Proof Inbox? Verify ownership to take over this directory entry.
This server appears in the MCPBundles directory. Verify you operate it to take over the listing — name, description, logo, contact email, and skill content. We email a 6-digit code to a maintainer address your server publishes in /.well-known/security.txt or /.well-known/mcpbundles.json. Free, takes about a minute.
No provider sign-in was required during MCPBundles' probe. Your client may still need MCPBundles credentials depending on how you connect.
MCPBundles is an independent platform built on the open Model Context Protocol standard. Not affiliated with Anthropic PBC or Claude.