Verifiable receipt 3922a8a9 - capability_search result | Zambo

Verifiable receipt for a capability_search call on Zambo: {"query":"receipt","tools":[{"rank":1,"name":"zambo_check","description":"Evidence-aware universal pre

Observed result

{"query":"receipt","tools":[{"rank":1,"name":"zambo_check","description":"Evidence-aware universal preflight. Check a claim, source, tool, action, authorization boundary, execution, completion, output shape, freshness, conflict, or prompt security before relying on it. Returns compact machine-readable status, confidence, observed evidence, freshness, provenance scope, risk, recommended_action, next_action, and an integrity hash. It distinguishes claimed, observed, and verified and never turns a model opinion into proof. Legacy URL + optional GitHub legitimacy scoring remains supported. Free, no auth."}],"message":"Ask zambo_check to verify a receipt, or use continuity_get_recent with your job ID to find recorded work."}

Provenance for every timeline entry

Private agent reasoning, built-in client actions, and direct calls to unrelated MCP servers are not included unless an agent or gateway reports them.

What is this?

An AI agent completed a tool call through Zambo, and this page records the result. The SHA-256 hash below fingerprints exactly what the agent produced. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too. Check the hash yourself.

What is an execution receipt?

An execution receipt is the public record of one completed AI agent tool call. Read the canonical definition of an AI agent execution receipt.

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This receipt proves the call completed. When the free allowance is not enough, choose the access path that fits the job.

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Verification checks

Proof of observed execution

EXECUTED BY ZAMBO

Receipt ID
3922a8a9-0172-4932-8330-fc5300da30e7
SHA-256 output hash
sha256:164b6d1c85e619ed15344095e6258b4c8d4cd39e472fd6d1b87a86c7203146da
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.3
Tool name
capability_search
Tool version
4.0.0
Permission scope
public
Caller type
anonymous
Caller ID
sha256:52b8a124b31915655b0219a444d2392724dc326f9c4d3532f1c741c65027339f
Declared side effects
none
Side-effects schema
zambo-side-effects/1
Declaration hash
sha256:45aad38f3aa982b9aafe92ecb416ebe98791eddbaf8ab6df0bd08605b7c1bfee

This records what the server-side tool contract declared at call time. It does not independently verify that a downstream side effect happened.

Bound upstream evidence

Status
no_upstream_bytes_captured
Evidence SHA-256
unavailable
Byte length
unavailable

Neutral Nostr anchor

Event ID
c9117795531804394f3e03fb43e1119fcb2198dd5f546dafbdab82d552c97d89
Anchor status
published
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.damus.io · wss://nos.lol · wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-10-03T13:10:20.182Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:164b6d1c85e619ed15344095e6258b4c8d4cd39e472fd6d1b87a86c7203146da","receipt_uuid":"3922a8a9-0172-4932-8330-fc5300da30e7","schema_version":"zambo-receipt-anchor/1"}

Anchor status "published": Published to all configured relay targets.

Check this hash yourself

Open the verification endpoint. The server recomputes the SHA-256 from the stored bytes and answers verified:true. If it does not say verified, do not trust this page. See the Nostr anchor event on a public viewer. The fingerprint is timestamped outside Zambo too.

Embed this receipt

Markdown

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HTML

<a href="https://zambo.dev/run/3922a8a9-0172-4932-8330-fc5300da30e7"><img src="https://zambo.dev/api/receipt/3922a8a9-0172-4932-8330-fc5300da30e7/badge.svg" alt="Verifiable Zambo receipt"></a>

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