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Chirindo by Headless Oracle

Evidence for AI agents. Chirindo signs each agent action into a hash-chained log. Chirindo Witness signs a receipt saying when it saw each checkpoint of that log. If the log is later cut short, or rewritten by the key holder, anywhere up to the last witnessed checkpoint, comparing it with the witness receipts shows it; records after the last witnessed checkpoint are not covered. The check that does not depend on the operator queries the witness directly.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-23T18:24:37.930Z. Cached copy · Source on headlessoracle.com

# Chirindo by Headless Oracle

> Evidence for AI agents. Chirindo signs each agent action into a hash-chained log. Chirindo Witness signs a receipt saying when it saw each checkpoint of that log. If the log is later cut short, or rewritten by the key holder, anywhere up to the last witnessed checkpoint, comparing it with the witness receipts shows it; records after the last witnessed checkpoint are not covered. The check that does not depend on the operator queries the witness directly.

What a witness receipt is and is not, in the spec's words: An operator sends signed chain checkpoints to the witness, which records each one and signs a receipt saying when it saw it. The witness attests only "at time T, I received this checkpoint, validly signed by the key with this thumbprint". It does not attest who owns the key, nor that the records are true. Verifying against a sidecar file trusts the operator who supplied it. Only querying the witness is independent of the operator. Every limit: https://api.headlessoracle.com/v1/witness/spec (honest_limits).

## Chirindo Witness

- [Witness spec (machine-readable)](https://api.headlessoracle.com/v1/witness/spec): wire contract, the checks in order, error codes, and honest limits.
- [Submit a checkpoint (POST only)](https://api.headlessoracle.com/v1/witness/checkpoints): body {"checkpoint":{"v","type","session_id","count","last_entry_hash","ts","kid","sig"},"public_key_jwk":{...}}, an Ed25519-signed checkpoint with its public key as a JWK; exact rules in the spec. No account is needed for the free pool.
- Query the receipts, no setup: GET https://api.headlessoracle.com/v1/witness/checkpoints?kid=<thumbprint>&session_id=<id>. This is the check that does not depend on the operator.
- Host: https://api.headlessoracle.com and https://headlessoracle.com serve the same /v1/witness/* paths.

## Pricing

- Free: anonymous checkpoints from a shared pool of 2,000 new checkpoints per UTC day, shared by every anonymous caller. Once it is used up, a new anonymous checkpoint gets 503 witness_unavailable until the next UTC day.
- Evidence Starter: $49/month, your own Witness key, up to 1,000 new checkpoints per UTC day. Plan id custody_90d. Introductory until 31 December 2026.
- Evidence: $199/month, your own Witness key, up to 3,000 new checkpoints per UTC day. Plan id custody_1y. Introductory until 31 December 2026.
- Evidence pilot for a team in its audit window: $4,900 fixed, scope agreed by conversation. Write to mike@headlessoracle.com.
- Buy: POST https://headlessoracle.com/v5/checkout with {"plan":"custody_90d"} or {"plan":"custody_1y"}. The response carries a hosted payment url (a person pays by card) and a claim_token. After payment, POST https://headlessoracle.com/v5/claim with {"claim_token":"<token>"} returns the key, for 24 hours. If no key appears, write to mike@headlessoracle.com with the transaction ID from your Paddle receipt. Send the key as Authorization: Bearer <key> on POST https://api.headlessoracle.
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Machine-readable: GET /v1/resolve?q=headlessoracle.com · GET /v1/domain/headlessoracle.com · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for headlessoracle.com:
1. POST https://agentwebmap.com/v1/sites/headlessoracle.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://headlessoracle.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/headlessoracle.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/headlessoracle.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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