GAIP Witness Agent

Tools

• witness_register_terms: Use this when about to depend on a public HTTPS service and you want neutral evidence of what it delivers.
• witness_delivery: Use this when asked whether a service delivered what was agreed ("did the supplier deliver?").
• gaip_receipt_export: Export a GAIP receipt in another ecosystem's shape (for example x402 or in-toto).
• verify_gaip_receipt: Use this when you hold a GAIP receipt_id and want to confirm it ("is this receipt genuine?"). Returns the retained record, hash chain and Merkle inclusion proof.
• witness_dispute_bundle: Use this when a witnessed delivery failed and you must hand the facts to the other party or a resolver. Pass `terms_id` or a delivery `receipt_id`.
• gaip_watch_register: Register a free watch on an agent card, supplier interface or delivery terms; signed webhook on change.
• gaip_watch_list: List your watches, their last result and next check.
• gaip_watch_remove: Stop a watch and delete its stored events.
• gaip_watch_events: Read recent change events for your watches.
• gaip_citation_witness: Check that cited web pages exist and contain the quoted text.
• gaip_check_sar_receipt: Use this when handed an x402 SAR-shaped receipt (draft proposal shape; may change). Pass `sar_receipt`, optionally the issuer's `public_key`.
• gaip_record_extract: Use this when you need proof of what an agent or shop page declared on a date. Pass its `url` (optional `since`, `until`).
• witness_accept_terms: Use this when you are the other party to terms a buyer registered.
• witness_finding: Use this when deliveries exist for an agreement and you want GAIP's signed finding. Pass the `agreement_id` and your `continuity_handle`.
• witness_signoff: Use this when a role (APPROVER, REVIEWER, OWNER, OPERATOR or a hashed role_id) decided on an agent's proposal.
• assurance_prepare: Use this when you, the buyer, chose a public service and want its delivery checked end to end. Pass `service_url`, `checks` and explicit_read_only_consent=true.
• assurance_complete: Use this when finishing a Buyer Assurance check. Pass the `terms_id` from assurance_prepare and mode PUBLIC_REPLAY (GAIP replays the service) or BUYER_SUBMITTED.
• assurance_verify: Use this when you hold a Buyer Assurance terms or delivery receipt_id and want to confirm it. Returns the retained record and its integrity proof (integrity only).
• gaip_verify_supplier_claims: Use this to check what an agent, API or supplier claims. Pass `claims` (each with an `id`; add `check_url` and GAIP tests it now), your `observations` and `metadata`.
• inspect_counterparty_evidence: Use this when asked what evidence exists about an agent before delegating to it. Pass its `counterparty_id` and any `observations`.
• gaip_evidence_pack: Compile an agent's or supplier's conformance, watch, witness and repair history into one dossier with a verify URL per item.
• gaip_incident_bundle: Put the receipts and observations about an incident in time order.
• gaip_measure_outcome_value: Use this when asked whether an outcome-priced task delivered and what it cost.

Sign-offs

A sign-off (witness_signoff) is a record that a stated role recorded a stated decision at a stated time; it is the role's decision as recorded, never GAIP's own, and it is not a statement that any duty was met.

Connect a client

Call this agent

MCP endpoint: https://www.gaipagents.com/mcp/agents/witness (streamable HTTP, no account or key). A2A endpoint: https://www.gaipagents.com/a2a/witness-agent · A2A Agent Card.

claude mcp add --transport http gaip-witness https://www.gaipagents.com/mcp/agents/witness

{
  "mcpServers": {
    "gaip-witness": {
      "url": "https://www.gaipagents.com/mcp/agents/witness"
    }
  }
}

{
  "servers": {
    "gaip-witness": {
      "type": "http",
      "url": "https://www.gaipagents.com/mcp/agents/witness"
    }
  }
}

First call with curl

curl -s https://www.gaipagents.com/mcp/agents/witness -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"witness_register_terms","arguments":{"seller_ref":"example-weather-agent","service_url":"https://weather.example.com/forecast.json","checks":[{"id":"http_status_in","allowed":[200]},{"id":"json_parses"}]}}}'

A2A message/send

curl -s https://www.gaipagents.com/a2a/witness-agent -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"message/send","params":{"message":{"kind":"message","role":"user","messageId":"m1","parts":[{"kind":"text","text":"What can GAIP Witness Agent do? List its tools and one example."}]}}}'

Plain HTTPS

curl -s https://www.gaipagents.com/agents/witness/.well-known/agent-card.json

Free, read-only, no account or key. ChatGPT, the OpenAI Agents SDK, LangChain and more: client quickstart. Machine-readable: listing kit (client_config).

Discovery files

MCP descriptor · A2A Agent Card · MCP Server Card · Agent Skill (SKILL.md) · Complete distribution identity

Distribution

Agentverse, AGNTCY/OASF, public A2A Registry, ERC-8004 and Official MCP Registry acceptance are reported only after an external receipt is retained.