MCP server

stampthisfile Official

io.github.stampthisfile/mcp

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

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

Website Source

At a glance

Type

MCP server

Publisher

stampthisfile.com (verified by the MCP Registry)

Status

Working at last check

Tools

4

Token cost

About 972 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

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

Cursor

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

VS Code

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

Antigravity

agy mcp add stampthisfile https://stampthisfile.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"stampthisfile","server_url":"https://stampthisfile.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"stampthisfile","server_url":"https://stampthisfile.com/mcp"}

Tools

• get_proof ~140 tokens
  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.
• get_stamp ~120 tokens
  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 ~497 tokens
  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/pay
• verify_proof ~215 tokens
  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 come

Browse

• GitHub tools
• Payments
• GitHub and code hosting
• Crypto and blockchains

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