Public work receipt · checkable record

Zambo check · saved and checkable

✓ This result hasn’t changed since it was saved.

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Saved:
What ran: zambo_check

Zambo is the verifiable work layer for AI.

Observed result

status: uncertain confidence: medium reason: The operation is claimed or observed, not independently verified. evidence 1 / id: http_3bed0d1aff8f evidence 1 / kind: http_observation evidence 1 / source: https://zambo.dev/ evidence 1 / observed: Public endpoint responded with HTTP 200. evidence 1 / scope: reachability, response metadata, page title/description, and content hash evidence 1 / fetched at: 2026-11-14T13:43:11.694Z evidence 1 / http status: 200 evidence 1 / content type: text/html; charset=utf-8 evidence 1 / sha256: aeb6ac5dba519a0fdb2642508407ec4f17c5deca8be456b448a9519a208fc9d7 evidence 2 / id: observed_32782279fb2e evidence 2 / kind: execution_receipt evidence 2 / observed: The supplied context indicates the operation was observed, but does not establish independent verification. evidence 2 / scope: host-reported execution state assertion state / claimed: false assertion state / observed: true assertion state / verified: false assertion state / scope: not independently verified freshness / checked at: 2026-11-14T13:43:11.784Z freshness / source count: 1 freshness / newest source at: 2026-11-14T13:43:11.694Z risk / level: high risk / side effects: true risk / reversible: [private] risk / approval required: true risk / reasons 1: The request concerns an external action or execution; Zambo does not authorize it from a natural-language request alone. provenance / method: deterministic observations plus caller-supplied context provenance / sources 1: https://zambo.dev/ provenance / limitations 1: A reachable source is not proof that its claims are true. provenance / limitations 2: Caller-supplied claimed/verified fields are not independently authenticated. recommended action: verify_more next action: verify proof / type: integrity_hash proof / hash: 5e2c5f5ecc30ed949f963d798c90c997e159f3395bc7bafa6f9369baee24c168 proof / recorded at: 2026-11-14T13:43:11.784Z proof / scope: integrity of this check response and its observed evidence; not a universal truth certificate proof / independently verifiable: false proof / note: This hash is not a persisted proof certificate. Use the dedicated proof capability only when a durable certificate is explicitly requested.

This is the saved result preview, not proof that the answer was correct.

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Show technical provenance details

Provenance for every timeline entry

  • EXECUTED BY ZAMBOZambo ran the tool call itself.
  • OBSERVED VIA GATEWAYA Zambo gateway observed request and response bytes from the named external executor. Zambo did not run that external action.
  • LOGGED BY AGENTAn agent or local hook reported the action. Zambo attests that the record is unchanged since logging, not that the action happened as described.

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 an execution receipt?

An execution receipt is a public record of a reported AI agent tool call. Its byte commitment and provenance claim can be checked independently; neither alone authenticates the issuer. Read the canonical definition of an AI agent execution receipt.

What the receipt can and cannot prove

What is this?

Zambo's receipt store reports a tool call and records its result. The SHA-256 commitment covers the exact canonical bytes. The provenance label is bound to v0.4 receipt bytes when that check passes, but no pinned signature or trusted issuer key is checked. An anchor can timestamp a fingerprint; it does not authenticate the issuer.

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Show technical verification checks

Verification checks

  • SHA-256 commitment: Checked independently against the exact decoded bytes
  • Provenance binding: PASS; The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.
  • Metadata binding: PASS; metadata_hash matches the canonical metadata block.
  • Issuer authentication: NOT CHECKED; no pinned signing key or trusted issuer was supplied
  • Signature: NOT CHECKED; no Ed25519 signature or pinned key is supplied
  • Chain: NOT CHECKED; no append-only chain proof is validated
  • Stored timestamp: 2026-11-14T13:43:11.935Z; external immutability is not checked

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Get receipts for your own AI work: add zambo.dev/mcp

One URL, no key. Copy the line for your AI and add it yourself in its settings.

  • ClaudeSettings, Connectors, Add custom connector, paste the URL.
    https://zambo.dev/mcp
  • ChatGPTSettings, Apps and Connectors, developer mode, create a connector with this URL.
    https://zambo.dev/mcp
  • GrokAdd a remote MCP server in your Grok client and paste the URL.
    https://zambo.dev/mcp
  • CursorPaste into ~/.cursor/mcp.json.
    {"mcpServers":{"zambo":{"url":"https://zambo.dev/mcp"}}}

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Show receipt data and verification evidence

Committed provenance claim

EXECUTED BY ZAMBO

The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.

Receipt ID
6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf
SHA-256 output hash
sha256:48dbbc53c89bde53c466bc78c10055e6ebb28e7e81183f8855e9f5a8a8b9577a
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.4
Tool name
zambo_check
Tool version
4.1.4
Permission scope
public
Caller type
anonymous
Caller ID
sha256:7eadbb768fde346a5ab7ddcd643c7f8988a0539a066cbcc684abb11c7d5dd1f4
Caller basis
ip_ua_30d
Caller rotates at
2026-12-03T00:00:00.000Z
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
ok
Evidence SHA-256
sha256:a509d5b363c81fb32ce29007eef75a939eafd7cde749feeca2698be66d701aa0
Byte length
2259

Fetch exact evidence bytes

Upstream provenance

This receipt is independently auditable against the named upstream source. This is not a mathematical correctness claim.

  • Source: · queried at: · raw response hash:

Neutral Nostr anchor

Event ID
d42dbe6e40f0f8b848a18be52c307cf83a89a3a2c7e97bb64fc92f62dc7266dd
Anchor status
published
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-11-14T13:43:11.935Z","evidence_byte_length":2259,"evidence_sha256":"sha256:a509d5b363c81fb32ce29007eef75a939eafd7cde749feeca2698be66d701aa0","evidence_url":"https://zambo.dev/api/evidence/a509d5b363c81fb32ce29007eef75a939eafd7cde749feeca2698be66d701aa0","output_sha256":"sha256:48dbbc53c89bde53c466bc78c10055e6ebb28e7e81183f8855e9f5a8a8b9577a","receipt_uuid":"6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf","schema_version":"zambo-receipt-anchor/1"}

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

Relay publication is separate from receipt integrity. When the original signed event is available, Zambo retries pending, partial, or failed anchors about once a minute. Relay acknowledgements are external, so there is no guaranteed completion time; the receipt remains checkable from its saved bytes and verification link.

Check this hash yourself

Receipt commitment: commitment matched; issuer, signature and chain not checked. This checks the saved bytes, not whether the answer was correct. Recompute the SHA-256 commitment in your browser. Open the API v2 JSON response to inspect the machine-readable checks. See the Nostr anchor event on a public viewer. The fingerprint is timestamped outside Zambo too.

Embed this receipt

Markdown

[![Verifiable Zambo receipt](https://zambo.dev/api/receipt/6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf/badge.svg)](https://zambo.dev/run/6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf?ref=badge)

HTML

<a href="https://zambo.dev/run/6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf?ref=badge"><img src="https://zambo.dev/api/receipt/6e2cbc01-0eb2-4e5f-aff4-c60fc45872bf/badge.svg" alt="Verifiable Zambo receipt"></a>

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