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Mark

R0· no sign-in

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

v1.1.1 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality77good
Trust83of 100
Uptime, 30 days100%
Latency p50753 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "proof": {
      "type": "http",
      "url": "https://mark.tatastu.dev/mcp"
    }
  }
}
claude mcp add --transport http proof https://mark.tatastu.dev/mcp
[mcp_servers.proof]
url = "https://mark.tatastu.dev/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "proof": {
      "type": "remote",
      "url": "https://mark.tatastu.dev/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "proof": {
      "type": "http",
      "url": "https://mark.tatastu.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=proof&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbWFyay50YXRhc3R1LmRldi9tY3AifQ%3D%3D"
}
{
  "servers": {
    "proof": {
      "type": "http",
      "url": "https://mark.tatastu.dev/mcp"
    }
  }
}
{
  "mcpServers": {
    "proof": {
      "httpUrl": "https://mark.tatastu.dev/mcp"
    }
  }
}
extensions:
  "proof":
    enabled: true
    name: "proof"
    type: streamable_http
    uri: "https://mark.tatastu.dev/mcp"
    timeout: 300

Quality 77 / 100good

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene79 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • warn
    tools.description_length1 tools have descriptions over 1,024 characters, which crowds the context
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations7 of 7 tools declare readOnlyHint or destructiveHint
  • fail
    tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: create_account (readOnlyHint); revoke_proof (readOnlyHint, openWorldHint); list_proofs (destructiveHint, idempotentHint, openWorldHint); …
  • pass
    tools.token_costabout 1,298 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool history recorded for 2 of the 7 days needed
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

7 tools, about 1,298 tokens to load them all · tool set 4e1fa1367898 · checked 2026-10-19 16:53 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 83 / 100

no-repository
provenance55
liveness100
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-100% +updated-2d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://mark.tatastu.dev/mcp streamable-httpnoneyes100%753 ms2025-06-182026-10-19

Tools (7)

create_accountProvision 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, verify_proof (no auth needed but fine to send), list_proofs, revoke_proof. The account receives one lifetime sample stamp under a fresh creator id, with no identity attached. Rate-limited to 3 accounts per IP per day; for higher volume or a human-owned account, direct a person to mark.tatastu.dev/account instead.
create_proofStamp 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>` to use the account's lifetime sample. 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. If the response is `payment_required`, sign one advertised x402 requirement and retry the identical call with its `PAYMENT-SIGNATURE` header. 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.
grant_accessGrant 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.
list_proofsread-onlyList your recent stamps (requires API key).
revealread-onlyRetrieve 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.
revoke_proofdestructiveRevoke a stamp you created (forward-only: anchored history stays verifiable, but the proof is marked revoked from now on). Requires API key.
verify_proofread-onlyVerify 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.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "dev.tatastu/proof",
  "title": "Mark",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://mark.tatastu.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.1.1",
  "websiteUrl": "https://mark.tatastu.dev",
  "description": "Mark: stamp files with a signed, timestamped provenance record. Hash locally; verify free."
}