"Stamp" is ambiguous: it could mean timestamping data for tamper-evident proof, a stamp duty tax calculation, a Bitcoin UTXO art stamp, or a signature stamp in e-signing. The request does not say which, so the most direct fit for the generic word is a timestamping or provenance tool. Markovian Protocol offers a Stamp action that commits data to a chain and returns a tamper-evident provenance receipt 919, and Getalby's stamp_hash action submits a hash for OpenTimeStamps timestamping 716.
A question back: What kind of stamp do you need: a timestamp or provenance proof for data, a UK stamp duty calculation, a Bitcoin Stamps artwork, or a signature stamp for e-signing?
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Albygetalby.comfound in code, not yet checked
Its stamp_hash action submits a hash for timestamping using OpenTimeStamps calendar servers 16.
for agents: stamp_hash · load_proof · get_proof_info
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Stampchainstampchain.iowebsite read, tools not yet checked
Lets you create and buy Bitcoin Stamps, art written into Bitcoin UTXOs 10.
Sources
- 7Alby Bitcoin Lightning Wallets & Toolsgetalby.com · read 2026-10-30
- 8Property Finance Calculators & Tools UK | FD Commercialfdcommercial.co.uk · read 2026-10-29
- 9Markovian Protocol — Second Measurementsmarkovianprotocol.com · read 2026-10-29
- 10Bitcoin Stamps: Unprunable UTXO Art | Stampchainstampchain.io · read 2026-10-30
- 16ghapi: declares "api" (the record we read and signed)unfragile.ai · read 2026-10-24
- 19Markovian Provenance: declares "Stamp" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
stripe · stripe verified and signed
gtm-enterprise-account-planning · gtm-enterprise-account-planning verified and signed
Strategic account planning and execution for enterprise deals. Use when planning complex sales cycles, managing multiple stakeholders, applying MEDDICC qualification, tracking deal health, or building mutual action plans. Includes the "stale MAP equals dead deal" pattern.
slack · slackclient verified and signed
render-textures · render-textures verified and signed
Use this skill when using RenderTexture or DynamicTexture in Phaser 4. Covers drawing game objects to textures, dynamic texture creation, snapshot/screenshot, stamps, and off-screen rendering. Triggers on: RenderTexture, DynamicTexture, snapshot, draw to texture, stamp.
AccountSignatures_PutAccountSignatureById · DocuSign REST API verified and signed
Updates an account stamp by ID.
api · ghapi verified and signed
stamp_hash · OpenTimeStamps MCP Server found in code, not yet checked
Submit a hash for timestamping using OpenTimeStamps calendar servers
uk_stamp_duty_calculator · property-finance-mcp found in code, not yet checked
Calculate UK property transaction tax across England/Northern Ireland (SDLT), Scotland (LBTT)
Stamp · Markovian Provenance verified and signed
Commit any data to the Markovian chain; get a tamper-evident provenance receipt.
· Stampchain website read, tools not yet checked
Browse, buy and create Bitcoin Stamps: art written straight into Bitcoin UTXOs, plus SRC-20 tokens, curated collections and a live explorer.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.