Verifiable receipt a8bb0d7b - zambo_universal result | Zambo

Verifiable receipt for a zambo_universal call on Zambo: {"status":"executed","primary_tool":"live_price","executed":true,"executed_tools":["live_price"],"result

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.

Observed result

{"status":"executed","primary_tool":"live_price","executed":true,"executed_tools":["live_price"],"result":"BTC · $84,571.00 USD\n▼ 1.86% (24h) · Market cap: $1698.41B\n\nLive price via CoinGecko · Thu, 24 Sep 2026 07:57:50 GMT","verify":{"status":"complete","message":"BTC-USD price and source were returned by the live price provider."}}

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Verification checks

Proof of observed execution

EXECUTED BY ZAMBO

Receipt ID
a8bb0d7b-cee6-47f6-87a9-35484aad4463
SHA-256 output hash
sha256:df3f2714ccd5c69513322b8db7672f2b3e481834069f12c9d5be5a8ebb3e11a6
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.3
Tool name
zambo_universal
Tool version
4.0.0
Permission scope
public
Caller type
anonymous
Caller ID
sha256:ca87aaf52f17f7ff6d9acd4c3c9d9f06174bdd544864a6897dfdce203928b1ee
Declared side effects
state_write
Side-effects schema
zambo-side-effects/1
Declaration hash
sha256:dfb4412aa429d3ac637a05668c435bcc90a251363fcdd49f7b85ae4ab55b5bc9

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
sha256:2fe56b42ba4c463e70d2370f4fc5c9d28f9c337c98baa24fba48dea5cd2a0bb9
Byte length
98

Fetch exact evidence bytes

Upstream provenance

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

Neutral Nostr anchor

Event ID
e37ae749e2ad4a3aa0ab2a58453ab8119cbbe7cd899478252c965a25471f260a
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":"2026-09-24T07:57:50.530Z","evidence_byte_length":98,"evidence_sha256":"sha256:2fe56b42ba4c463e70d2370f4fc5c9d28f9c337c98baa24fba48dea5cd2a0bb9","evidence_url":"https://zambo.dev/api/evidence/2fe56b42ba4c463e70d2370f4fc5c9d28f9c337c98baa24fba48dea5cd2a0bb9","output_sha256":"sha256:df3f2714ccd5c69513322b8db7672f2b3e481834069f12c9d5be5a8ebb3e11a6","receipt_uuid":"a8bb0d7b-cee6-47f6-87a9-35484aad4463","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.

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