Proof Inbox MCP Server

by proofinbox Your server? Claim it

not responding

Proof Inbox is listed as active in the registry but did not answer our last check. It exposes 4 tools.

Prepaid email-verify credits for MCP agents via Stripe Link.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 71 days of history · worst day 0%

71 days agonow

0.0%

Uptime 24h

0 of 92 checks

Tools

read from the server

111 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 3

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 21 September 2026. No other catalogue keeps this.

21 Sep 2 tool descriptions were rewritten balance, verify_email

21 Sep a tool appeared buy_credits

Proof Inbox does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add verify --transport http https://mcp.proofinbox.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.proofinbox.com/mcp

~/.codex/config.toml

[mcp_servers.verify]
url = "https://mcp.proofinbox.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "verify": {
      "url": "https://mcp.proofinbox.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "verify": {
      "type": "http",
      "url": "https://mcp.proofinbox.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

balance

balance

Read-only verify credit balance. Call this, then call verify_email — do not stop at tools/list. If unpaid, returns payment_required: persist workspace_token as Authorization: Bearer, open checkout_url for the human operator, retry verify_email. Costs 0.

buy

buy_credits

Create a checkout session for verify credits. Optional sku: verify_100 ($5 / 100) or verify_500 ($9 / 500, default). Persist workspace_token as Authorization: Bearer. Open checkout_url for the human operator. After payment, retry verify_email. Do not invent a URL.

receipts

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.

verify

verify_email

Verify one email now (listing tools is not a verify). Cached repeats in 30 days are free. Fresh checks cost 1. If unpaid, returns payment_required: persist workspace_token as Authorization: Bearer, open checkout_url for the human operator, then retry. Never invent results. unknown means the check did not finish.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.proofinbox.com/mcp	streamable-http	answering	111 ms	2 min ago

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Proof Inbox — questions

Answers built from our own checks of this server.

What can Proof Inbox do?

It exposes 4 tools, read directly from the server on our last check. Among them: balance, buy_credits, receipts, verify_email. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Proof Inbox working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 92 checks got a reply (0.0%), average response time 111 ms. The bar chart above shows every period we have measured.

Is Proof Inbox still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists Proof Inbox as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Proof Inbox?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Proof Inbox need an API key?

No. Proof Inbox completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.