Verifiable receipt ff7a0e2d - weather result | Zambo

Verifiable receipt for a weather call on Zambo: {"city":"Mccormickville, United States of America","current":{"condition":"Clear ","temperature":"18°C (feels 15

Observed result

{"city":"Mccormickville, United States of America","current":{"condition":"Clear ","temperature":"18°C (feels 15°C)","humidity":"49%","wind":"16 km/h","uv_index":"0"},"forecast_3day":[{"date":"2026-10-10","high":"24°C","low":"18°C","description":"Overcast "},{"date":"2026-10-11","high":"21°C","low":"17°C","description":"Sunny"},{"date":"2026-10-12","high":"28°C","low":"19°C","description":"Sunny"}],"summary":"Clear . 18°C (feels 15°C). Humidity 49%. Wind 16 km/h. UV index 0.","provider":"wttr.in","data_status":"live"}

Check this receipt

This record shows the result and timestamp stored for the call. Recompute the SHA-256 commitment from the saved bytes in your browser; signatures and chain proofs are not checked.

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 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.

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.

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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.
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: 2026-10-10T10:20:14.660Z; external immutability is not checked

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Committed provenance claim

EXECUTED BY ZAMBO

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

Receipt ID: ff7a0e2d-43d0-420f-8dd0-35d9622323e8
SHA-256 output hash: sha256:12ed32dec7b9be57d5bedd555e621ce64e264c448c1473fd104114258c2f6a61
Canonical bytes: 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
Timestamp: 2026-10-10T10:20:14.660Z

Bound call context

Receipt schema: 0.4
Tool name: weather
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:314830e58c74d2201f949134f13457d8dc2bffe30e3c2ac3178510a8e8af8784
Caller basis: ip_ua_30d
Caller rotates at: 2026-11-03T00:00:00.000Z
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: captured
Evidence SHA-256: sha256:ed7fbb2c7442dad70d1c24d930b67a3923c47ec7d99ef98e7587a540c8fa78e3
Byte length: 39498

Fetch exact evidence bytes

Upstream provenance

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

Source: wttr.in · queried at: 2026-10-10T10:20:14.643Z · raw response hash: sha256:ed7fbb2c7442dad70d1c24d930b67a3923c47ec7d99ef98e7587a540c8fa78e3

Neutral Nostr anchor

Event ID: dfd95687bd8ac6567fa772b422ba3255bfa897e4ff4ceaf4683e7c40b307955a
Anchor status: partial
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":"2026-10-10T10:20:14.660Z","evidence_byte_length":39498,"evidence_sha256":"sha256:ed7fbb2c7442dad70d1c24d930b67a3923c47ec7d99ef98e7587a540c8fa78e3","evidence_url":"https://zambo.dev/api/evidence/ed7fbb2c7442dad70d1c24d930b67a3923c47ec7d99ef98e7587a540c8fa78e3","output_sha256":"sha256:12ed32dec7b9be57d5bedd555e621ce64e264c448c1473fd104114258c2f6a61","receipt_uuid":"ff7a0e2d-43d0-420f-8dd0-35d9622323e8","schema_version":"zambo-receipt-anchor/1"}

Anchor status "partial": Published to some configured relay targets; publication was not confirmed by every configured relay.

Check this hash yourself

Recompute the SHA-256 commitment in your browser. Open the API v2 JSON response to inspect the machine-readable checks. Signature and chain remain NOT CHECKED unless a real signature verifier or chain proof is supplied. There is no combined “verified” verdict. 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/ff7a0e2d-43d0-420f-8dd0-35d9622323e8"><img src="https://zambo.dev/api/receipt/ff7a0e2d-43d0-420f-8dd0-35d9622323e8/badge.svg" alt="Verifiable Zambo receipt"></a>

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