All servers · Crypto & blockchain · Agent payments (x402) · Payments & accounting

stampthisfile

io.github.stampthisfile/mcp · v0.1.0

New (7 days)Tools changed (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Can write (some tools are not declared read-only)
Capabilities declared	tools
Tool definitions	4 tools · with description 100% · input schema is an object 100% · read/destructive hints 75%

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

streamable-http · https://stampthisfile.com/mcp

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

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

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/pay
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.
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_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 come

Repository · Website · JSON · Text for agents · Registry updated 2026-10-20