Verifiable receipt 972203a3 - weather result | Zambo

Verifiable receipt for a weather call on Zambo: {"city":"Charlesbourg, Canada","current":{"condition":"Moderate rain","temperature":"8°C (feels 7°C)","humidity"

Observed result

{"city":"Charlesbourg, Canada","current":{"condition":"Moderate rain","temperature":"8°C (feels 7°C)","humidity":"96%","wind":"6 km/h","uv_index":"0"},"forecast_3day":[{"date":"2026-10-07","high":"11°C","low":"3°C","description":"Overcast "},{"date":"2026-10-08","high":"13°C","low":"7°C","description":"Light rain shower"},{"date":"2026-10-09","high":"9°C","low":"4°C","description":"Patchy rain nearby"}],"summary":"Moderate rain. 8°C (feels 7°C). Humidity 96%. Wind 6 km/h. UV index 0.","provider":"wttr.in","data_status":"live"}

$0.99 Day Pass · 24h access · USDC on Base — activate with day_pass_activate.

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.

Keep the work moving

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

UNLOCK 24H DAY PASS ($0.99) →

See all plans on the pricing page →

RUN YOUR OWN FREE CALL →

Or re-run this exact call, using the same tool and arguments.

Share on X ·

Verification checks

SHA-256 commitment: Checked independently against the exact decoded bytes
Provenance binding: PASS; provenance_class is bound to these 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: 2026-10-08T03:02:05.017Z; external immutability is not checked

Committed provenance claim

EXECUTED BY ZAMBO

provenance_class is bound to these bytes; issuer is not authenticated.

Receipt ID: 972203a3-5239-4e06-ae7d-eb1448551256
SHA-256 output hash: sha256:4e60f73eb12b600cb60e6a2aedada42eac62786cb3a762d54f6a48cab71c3564
Canonical bytes: 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
Timestamp: 2026-10-08T03:02:05.017Z

Bound call context

Receipt schema: 0.4
Tool name: weather
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:462e58a7c71e2908382513a2b3aa6526ad882e315da5746728c943130aea6da4
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: sha256:459ffb9cafb05760f337fa1c21891099fabbf601b16e4cf53abec82c3808fd56
Byte length: 39503

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: 2026-10-08T03:02:04.947Z · raw response hash: sha256:459ffb9cafb05760f337fa1c21891099fabbf601b16e4cf53abec82c3808fd56

Neutral Nostr anchor

Event ID: b3fbf86018520f0c76ea2c6ba15e225690be694f69f0b2bd1cc0eb8b4012911f
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":"2026-10-08T03:02:04.964Z","evidence_byte_length":39503,"evidence_sha256":"sha256:459ffb9cafb05760f337fa1c21891099fabbf601b16e4cf53abec82c3808fd56","evidence_url":"https://zambo.dev/api/evidence/459ffb9cafb05760f337fa1c21891099fabbf601b16e4cf53abec82c3808fd56","output_sha256":"sha256:4e60f73eb12b600cb60e6a2aedada42eac62786cb3a762d54f6a48cab71c3564","receipt_uuid":"972203a3-5239-4e06-ae7d-eb1448551256","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

[![Verifiable Zambo receipt](https://zambo.dev/api/receipt/972203a3-5239-4e06-ae7d-eb1448551256/badge.svg)](https://zambo.dev/run/972203a3-5239-4e06-ae7d-eb1448551256)

HTML

<a href="https://zambo.dev/run/972203a3-5239-4e06-ae7d-eb1448551256"><img src="https://zambo.dev/api/receipt/972203a3-5239-4e06-ae7d-eb1448551256/badge.svg" alt="Verifiable Zambo receipt"></a>

Open badge SVG