Mark

dev.tatastu/proofVersion 1.1.2

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

Status

Responds524 msNov 14, 2026, 14:28 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:28 UTC
Latency: 524 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://makemark.io/mcpResponds524 msNov 14, 2026, 14:28 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: proof
Remote MCP server URL: https://makemark.io/mcp

Cursor

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

VS Code

code --add-mcp '{"name":"proof","type":"http","url":"https://makemark.io/mcp"}'

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Tools

9 tools

Tools of Mark
	Description		Read-only	Idempotent	Open world
`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 $1.50, 50 for $5.00, 100 for $8.00, 500 for $35.00, 1,000 for $65.00, 2,000 for $120.00 (bundle ids bundle_5, bundle_10, bundle_50, bundle_100, bundle_500, bundle_1000, bundle_2000).	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 $1.50, 50 for $5.00, 100 for $8.00, 500 for $35.00, 1,000 for $65.00, 2,000 for $120.00 (bundle ids bundle_5, bundle_10, bundle_50, bundle_100, bundle_500, bundle_1000, bundle_2000).	No	Not declared	No	Yes
`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 auth). The key owns its own creator id, with no identity attached. Free stamps: one per network, so check `freeStamp` in the result; when it is false, the key needs prepaid stamps (buy_stamps) or x402 payment before its first stamp. Rate-limited to 3 keys per network per day; for 3 free stamps a month or a human-owned account, direct a person to makemark.io/account instead.	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 auth). The key owns its own creator id, with no identity attached. Free stamps: one per network, so check `freeStamp` in the result; when it is false, the key needs prepaid stamps (buy_stamps) or x402 payment before its first stamp. Rate-limited to 3 keys per network per day; for 3 free stamps a month or a human-owned account, direct a person to makemark.io/account instead.	No	Not declared	No	No
`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 account's verified identity (domain/handle) or null. If you have no key, call create_account, store its one-time secret, and retry this same call with `Authorization: Bearer <secret>` (its `freeStamp` says whether a free stamp comes with it). If the response is `payment_required` or `quota_exhausted`, call buy_stamps and give a person the returned checkout link (prepaid packs never expire: 5 for $1.00, 10 for $1.50, 50 for $5.00, 100 for $8.00, 500 for $35.00, 1,000 for $65.00, 2,000 for $120.00), poll get_balance until the stamps arrive, then retry. To pay per stamp instead, sign one advertised x402 requirement and send it as a `PAYMENT-SIGNATURE` HTTP header: tool arguments can't carry it, so either configure your MCP client to send that header or POST the same JSON to https://makemark.io/proof directly. An `invalid_api_key` error means the key is mistyped or revoked: create a new one. The optional disclosure fields (aiDisclosure, usageNote, location) only show on `visibility: public` stamps and are unsigned metadata, not part of the cryptographic proof. The stamp asserts provenance from a signer at a time, not authorship truth.	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 account's verified identity (domain/handle) or null. If you have no key, call create_account, store its one-time secret, and retry this same call with `Authorization: Bearer <secret>` (its `freeStamp` says whether a free stamp comes with it). If the response is `payment_required` or `quota_exhausted`, call buy_stamps and give a person the returned checkout link (prepaid packs never expire: 5 for $1.00, 10 for $1.50, 50 for $5.00, 100 for $8.00, 500 for $35.00, 1,000 for $65.00, 2,000 for $120.00), poll get_balance until the stamps arrive, then retry. To pay per stamp instead, sign one advertised x402 requirement and send it as a `PAYMENT-SIGNATURE` HTTP header: tool arguments can't carry it, so either configure your MCP client to send that header or POST the same JSON to https://makemark.io/proof directly. An `invalid_api_key` error means the key is mistyped or revoked: create a new one. The optional disclosure fields (aiDisclosure, usageNote, location) only show on `visibility: public` stamps and are unsigned metadata, not part of the cryptographic proof. The stamp asserts provenance from a signer at a time, not authorship truth.	No	Not declared	Yes	No
`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 seconds.	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 seconds.	Not declared	Yes	Not declared	No
`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.	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.	No	Not declared	Not declared	No
`list_proofs`List your recent stamps (requires API key).	List your recent stamps (requires API key).	Not declared	Yes	Not declared	Not declared
`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.	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.	Not declared	Yes	Not declared	No
`revoke_proof`Revoke a stamp you created (forward-only: anchored history stays verifiable, but the proof is marked revoked from now on). Requires API key.	Revoke a stamp you created (forward-only: anchored history stays verifiable, but the proof is marked revoked from now on). Requires API key.	Yes	Not declared	Yes	Not declared
`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 `publisher`), and `conflict` (2+ distinct signers claimed the same bytes; earliest anchored is listed first). A no-match on a re-encoded/screenshotted copy is EXPECTED and is not evidence of fakery: fetch the original and verify that. Free, no auth required.	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 `publisher`), and `conflict` (2+ distinct signers claimed the same bytes; earliest anchored is listed first). A no-match on a re-encoded/screenshotted copy is EXPECTED and is not evidence of fakery: fetch the original and verify that. Free, no auth required.	Not declared	Yes	Not declared	No

Details

Registry status: Active
Published: Oct 21, 2026
Updated: Oct 21, 2026
Website: https://makemark.io/⁠ (opens in a new tab)
Repository: Not given
Categories: Uncategorized
GDPR: Not declared

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