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Mark

dev.tatastu/proof · v1.1.2

Measured by MCP Station

Instruction-like text was found in create_proof. This is a pattern match, not a verdict. What we look for

Description written by the publisher, not verified

Mark: stamp files with a signed, timestamped provenance record. Hash locally; verify free.

Connect

claude mcp add --transport http proof https://makemark.io/mcp

{
  "mcpServers": {
    "proof": {
      "url": "https://makemark.io/mcp"
    }
  }
}

Tools as reported by the server

• create_account
  Provision a persistent API key with no human, browser, or email in the loop. Call this once, store the returned `secret` (shown only this one time), and use it as the Authorization header on every later call: create_proof, list_proofs, revoke_proof, get_balance, buy_stamps (verify_proof needs no aut
• create_proof
  Stamp content with a permanent provenance record. Pass the sha256 hash of the content (hash it locally; the content itself is never uploaded). Returns an instant signed receipt: attach its verifyUrl, byline, badgeEmbed, and qrUrl to the published artifact. The receipt's `publisher` field carries the
• verify_proof
  Verify content against all existing stamps. Pass a sha256 hash; matching is EXACT-BYTES-ONLY. Read the verdict fields: `exact` (these bytes are stamped), each proof's `publisher` (the verified identity: domain/handle + tier, or null meaning an unverified account, never trust a name that isn't in `pu
• get_balance
  Your key's stamp balance (requires API key): plan, included monthly stamps used and remaining, prepaid stamps (`balance`), whether a free stamp is still unused (`lifetimeSampleAvailable`), and recent pack purchases. Poll this after a person pays a buy_stamps link; credits usually arrive within secon
• buy_stamps
  Start a purchase of prepaid stamps for your key (requires API key). Returns `url`: a Stripe Checkout link that a PERSON must open and pay; you cannot pay it yourself. Show the link to your user, then poll get_balance. The stamps land on this key's account and never expire. Packs: 5 for $1.00, 10 for
• list_proofs
  List your recent stamps (requires API key).
• revoke_proof write/delete
  Revoke a stamp you created (forward-only: anchored history stays verifiable, but the proof is marked revoked from now on). Requires API key.
• grant_access
  Grant a specific identity the ability to decrypt escrowed content. Only available for proofs created with content escrow opted in (not yet available — stamps are hash-only today). Returns a capability token the grantee uses with reveal.
• reveal
  Retrieve escrowed content for a proof you have been granted access to. Only available for proofs created with content escrow opted in (not yet available — stamps are hash-only today). The service re-checks H(content) == stampedHash before returning.

Tool changes

• 2026-10-23: create_account, create_proof, verify_proof, get_balance, buy_stamps, list_proofs, revoke_proof, grant_access, reveal
• 2026-10-22: create_account, create_proof, verify_proof, list_proofs, revoke_proof, grant_access, reveal

Website · JSON · Text for agents · Registry updated 2026-10-21