stampthisfile MCP Server

by stampthisfile Your server? Claim it

answering

stampthisfile is answering right now. Last checked 5 min ago. It exposes 4 tools. Last commit 21 Oct 2026.

Timestamp files in Bitcoin (OpenTimestamps): send a hash, pay per hash with x402, get a proof.

Uptime history 14 days of history · worst day 99%

14 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

226 ms

Response time

average over 24h

Stars

last commit 21 Oct 2026

What changed 1

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

21 Oct a tool description was rewritten verify_proof

stampthisfile missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of 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 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp --transport http https://stampthisfile.com/mcp

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

https://stampthisfile.com/mcp

~/.codex/config.toml

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

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://stampthisfile.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://stampthisfile.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.

stamp

get_stamp

Status of one stamp: pending, complete (with the Bitcoin block height and time, and a statement of what it proves) or failed (not confirmed within 7 days). Free.

stamp_hashes

Timestamp 1-100 SHA-256 hashes in Bitcoin. Paid per hash with x402: without a payment the tool returns an error whose structuredContent is an x402 PaymentRequired (x402Version 2, exact scheme, USDC on Base). Retry with the same arguments and the signed PaymentPayload in the request's _meta["x402/payment"] (the x402 MCP transport), or, if your client cannot set _meta, in the `payment` argument. The settlement comes back in _meta["x402/payment-response"]. Returns a batch with, per hash, the stamp id, a pending .ots proof (base64: save it now) and its ots_url, plus a receipt signed by us. Invalid input is never charged; retrying with the same payment and arguments returns the same answer without paying twice.

proof

get_proof

The current .ots proof of one stamp, base64. Once get_stamp says complete, fetch it again: the complete proof carries the Bitcoin attestation and can be verified by anyone, without us. Save it next to the file as <file>.ots. Free.

verify

verify_proof

Check an OpenTimestamps proof (from us or anyone) against the SHA-256 of a file. Returns valid with status complete (Bitcoin block and the time the file existed by), valid with status pending (not in Bitcoin yet), or invalid with a reason. A pending proof whose calendars have since committed it comes back complete with `upgraded: true` and the completed proof in `ots` (base64): save it in place of the pending one. Nothing is stored. Free.

Endpoints

URL	Transport	State	Latency	Checked
https://stampthisfile.com/mcp	streamable-http	answering	126 ms	5 min ago

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stampthisfile — questions

Answers built from our own checks of this server.

What can stampthisfile do?

It exposes 4 tools, read directly from the server on our last check. Among them: get_proof, get_stamp, stamp_hashes, verify_proof. 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 stampthisfile working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 226 ms. The bar chart above shows every period we have measured.

How do I connect stampthisfile?

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 stampthisfile need an API key?

No. stampthisfile 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.

How fast is stampthisfile?

It answers our handshake in 226 ms on average, which is faster than 62% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is stampthisfile open source?

The code is open source: it is published under the MIT licence, 0 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at stampthisfile.com, which runs on its operator's own terms.