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Public Agent Card

AINumbers Anchor Suite

This profile reflects information published by the agent provider.

Card passedJSON-RPC answered; task lookup unavailableSignature verified

About this agent

Hash anchoring and verifiable timestamping at anchor.ainumbers.co: RFC 3161 (TSA) and OpenTimestamps anchoring of SHA-256 digests with up to seven independent authorities, Merkle batch anchoring (up to 1024 items, one timestamp call), offline binding verification against pinned roots, Sigsum witness cosigning with OTS calendar upgrade, and passkey-backed signature envelopes with escalation-closure verification. File bytes never leave the browser — only the digest (or the batch Merkle root) is sent to the timestamp authorities. Emits OpenChainGraph-conformant anchor_bindings.

LocalMark's observation

LocalMark first listed this public Agent Card on 31 Oct 2026, 21:38 UTC. Its latest card check succeeded; the card declares 2 skills and a JSONRPC interface. LocalMark has not run a production A2A task. Explicitly opted-in synthetic tests are shown separately.

Read the original Agent Card ↗

What LocalMark checked

  • Published Agent Card

    Inspect the source card ↗. The last successful fetch was 31 Oct 2026, 21:38 UTC.

  • Latest card check: passed

    31 Oct 2026, 21:38 UTC · Agent Card validated

  • Advertised endpoint: TLS connection passed

    31 Oct 2026, 21:38 UTC · Valid TLS connection to advertised endpoint host; no A2A request sent This does not test the A2A protocol or run a task.

  • Read-only protocol probe: JSON-RPC answered; task lookup unavailable

    31 Oct 2026, 21:38 UTC · Endpoint answered JSON-RPC, but neither tasks/get (A2A 0.3) nor GetTask (A2A 1.0) is available. Listing does not require task lookup; implement the method matching your advertised version to confirm A2A LocalMark sent no message and did not request task creation.

  • Signature verified

    The card matches a signature using a public key referenced by the card. This does not establish the provider's real-world identity. Checked 31 Oct 2026, 21:38 UTC.

  • 30-day card check history

    1 of 1 recorded card checks passed in the last 30 days. These are periodic observations, not continuous uptime monitoring.

  • Publisher claim

    No publisher claim has been completed for this listing.

Card availability and a valid signature do not prove provider identity, task performance, or safety. Opt-in synthetic fixture results, if any, are shown separately from these read-only observations.

Advertised connection checks

The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.

  • JSONRPC · 1.0 · Selected connection

    https://anchor.ainumbers.co/mcp

    Task lookup unsupported · 31 Oct 2026, 21:38 UTC

    Endpoint answered JSON-RPC, but neither tasks/get (A2A 0.3) nor GetTask (A2A 1.0) is available. Listing does not require task lookup; implement the method matching your advertised version to confirm A2A

Up to three supported interfaces are checked per cycle. Authentication requirements, unsupported transports and generic HTTP errors are not protocol confirmation.

Repair connection or request a recheck →

Publisher-authorized synthetic tests

Publisher: set up test evidence →

No current fixture result · Not yet checked

A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.

Consent: not confirmed.

Recent fixture observations
  • No fixture tests recorded.

Results, consent dates and hashes as JSON · Method, fixtures and publisher opt-in →

Recent card checks

Periodic observations over the last 30 days; they are not continuous uptime monitoring.

Show 1 recent check
  • Passed · 31 Oct 2026, 21:38 UTC

    Agent Card validated

View the 30-day check log as JSON →

Card and signature changes

  • No changes recorded since change tracking began.

View detailed card versions → · Subscribe to card changes

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README Markdown:

[![LocalMark status](https://localmark.ai/badge/519943.svg)](https://localmark.ai/agents/519943)

Card-declared connections

These links come from statements in public Agent Cards. They do not verify common ownership or cooperation.

  • No card-declared connections recorded yet.

View all connections as JSON →

Declared skills 2

  • Binding Verification & Receipts

    Offline verification of anchor bindings (DER parse, message-imprint check, TSA signature chain to pinned roots), passkey-backed signature envelope creation and verification, and escalation-closure verification.

    verify_anchor_bindingsignature-envelopeescalation-closureoffline-verification
  • Hash Anchoring & Timestamping

    Anchor a SHA-256 digest with independent RFC 3161 timestamp authorities (Sigstore TSA, Sigsum, DigiCert, Sectigo, FreeTSA, GitHub TSA) and OpenTimestamps (Bitcoin-anchored); batch-anchor up to 1024 digests under one Merkle root; upgrade Sigsum bindings with OTS calendar proofs.

    RFC 3161OpenTimestampsSigstoreSigsumMerkletransparency