Verifiable Receipt d7442780 — live_price result | Zambo

Verifiable receipt for a live_price call on Zambo: {"symbol":"BTC","price_usd":81247,"display_price":"$81,247.00","change_24h":0.0029218981822610305,"market_cap

What is this?

An AI agent did real work through Zambo, and this page is the proof. The SHA-256 hash below is a fingerprint of exactly what the agent produced — change one character of the output and the fingerprint changes. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too — anyone can look it up by the event ID below. You don't have to take the agent's word for it. Check the hash yourself.

Observed result

{"symbol":"BTC","price_usd":81247,"display_price":"$81,247.00","change_24h":0.0029218981822610305,"market_cap":"$1632.09B","source":"CoinGecko","fetched_at":"2026-09-20T00:39:13.152Z","provenance":{"cached":true,"age_seconds":64,"reason":"upstream_unavailable"},"message":"BTC price served from the last good provider response because the upstream is temporarily unavailable."}

$1.49 Day Pass · 24h unlimited · USDC on Base — activate with day_pass_activate.

Keep the work moving

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

UNLOCK 24H DAY PASS ($1.49) → ZAMBO PASS $49 →

RUN YOUR OWN FREE CALL →

Or re-run this exact call — same tool, same arguments.

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Verification checks

Signature valid: Recomputable from canonical bytes
Issued by zambo.dev: Served from the zambo.dev receipt store
Chain valid: Receipt hash chain is internally consistent
Recorded in the immutable log: 2026-09-20T00:40:17.536Z

Proof of observed execution

Receipt ID: d7442780-58c7-4aab-b1e2-281c70cea2a8
SHA-256 output hash: sha256:7118acc563691e02e4d0bd9db77a615199f0b2daf130873cb6267267b43bbff2
Canonical bytes: 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
Timestamp: 2026-09-20T00:40:17.536Z

Bound call context

Receipt schema: 0.3
Tool name: live_price
Tool version: 4.0.0
Permission scope: public
Caller type: signal_handle
Caller ID: sha256:583f21af938717728cb594b16d00ff8e1e4c9cb241635490b111f5c7a217814e
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: sha256:6529e19eb4c125e9bf94e997ea53c292ea8f4d6d0a8f8c25fb400947c088da2e
Byte length: 187

Fetch exact evidence bytes

Upstream provenance

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

Source: CoinGecko · queried at: 2026-09-20T00:40:17.475Z · raw response hash: sha256:6529e19eb4c125e9bf94e997ea53c292ea8f4d6d0a8f8c25fb400947c088da2e

Neutral Nostr anchor

Event ID: aaf862c0eb8c52130f60a8647787c80ecb8e76d78347ab0964a4e13f66fc432b
Anchor status: partial
Public key: e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

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

Schema: zambo-receipt-anchor/1

Signed envelope bytes:

{"anchored_at":"2026-09-20T00:40:17.508Z","evidence_byte_length":187,"evidence_sha256":"sha256:6529e19eb4c125e9bf94e997ea53c292ea8f4d6d0a8f8c25fb400947c088da2e","evidence_url":"https://zambo.dev/api/evidence/6529e19eb4c125e9bf94e997ea53c292ea8f4d6d0a8f8c25fb400947c088da2e","output_sha256":"sha256:7118acc563691e02e4d0bd9db77a615199f0b2daf130873cb6267267b43bbff2","receipt_uuid":"d7442780-58c7-4aab-b1e2-281c70cea2a8","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

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

Embed this receipt

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