Verifiable receipt 41117f62 — leadsignal result | Zambo

Verifiable receipt for a leadsignal call on Zambo: {"status":"no_leads","executed":true,"leads":[],"trade":"Plumbing","city":"Austin, TX","message":"LeadSignal

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.

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":"no_leads","executed":true,"leads":[],"trade":"Plumbing","city":"Austin, TX","message":"LeadSignal executed but found no real leads for this search. No contacts were invented.","provider_response":{"error":"no_leads","message":"No active posts found in Austin for Plumbing right now. Homeowners post throughout the day — try again in a few hours, or search a nearby city.","status":404}}

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

Integrity check: 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: 2026-09-21T14:58:06.539Z

Proof of observed execution

Receipt ID: 41117f62-08cc-44f8-9934-2f147ba37351
SHA-256 output hash: sha256:13d5de41ad183649b70ed74e102841c847e3ce367ec7e14fbbaa5b4d1cda1755
Canonical bytes: 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
Timestamp: 2026-09-21T14:58:06.539Z

Bound call context

Receipt schema: 0.3
Tool name: leadsignal
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:81fd4a4ce589bf3e982091d8f2612bd7f9262e6248b90cdd5fe35c81c5222fff
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: sha256:1ae081cb79769eba65b109192e820df36e221f2253086129816dfb22302c5afa
Byte length: 178

Fetch exact evidence bytes

Neutral Nostr anchor

Event ID: 4ed6dc10758945c92345ccfcf5afafdfebce347acb04a75cbac449d56f7057a1
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":"2026-09-21T14:58:06.512Z","evidence_byte_length":178,"evidence_sha256":"sha256:1ae081cb79769eba65b109192e820df36e221f2253086129816dfb22302c5afa","evidence_url":"https://zambo.dev/api/evidence/1ae081cb79769eba65b109192e820df36e221f2253086129816dfb22302c5afa","output_sha256":"sha256:13d5de41ad183649b70ed74e102841c847e3ce367ec7e14fbbaa5b4d1cda1755","receipt_uuid":"41117f62-08cc-44f8-9934-2f147ba37351","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

Markdown

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HTML

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