Verifiable receipt a97cfbff - leadsignal result | Zambo

Verifiable receipt for a leadsignal call on Zambo: {"leads":[{"id":"reddit-814229912","title":"How to snake a shower drain? Help!","summary":"class=\"md\" I am

Observed result

{"leads":[{"id":"reddit-814229912","title":"How to snake a shower drain? Help!","summary":"class=\"md\" I am a single mom and, while clumps of hair make me gag, I refuse to continue to pay someone to snake my shower. I do normally use a hair catcher in the drain, but I'd gotten out of the habit (bad, I know) and now I have a big clog. / Can anyone point me to a video tutorial that's easy for laymen to understand on how to snake my shower drain? And recommendations on what type of snake to use? I'd bought some flimsy plastic ones and they didn't work at all. I have no idea what I'm doing","platform":"Reddit","location":"Chicago, ","actual_city":"Chicago,","requested_city":"Chicago","location_match":true,"postedAt":"2d ago","minutesAgo":3763,"score":74,"urgency":"high","contactInfo":"u//u/Big-Mind-6346 on Reddit | 💡 DM with your local rate and availability — first to respond wins","sourceUrl":"https://www.reddit.com/r/Plumbing/comments/1wua5fx/how_to_snake_a_shower_drain_help/","jobDetails":null,"outreachMessage":"Hi — I saw your post, “How to snake a shower drain? Help!”. If this is still active, please share the best way to discuss the project and any timing or scope details."}],"count":1,"trade":"Plumbing","city":"Chicago","requested_city":"Chicago","dashboard":"https://zambo.dev/leads/","_powered_by":"zambo.dev/leads"}

Verify this receipt

This is a verifiable receipt: the result above is hashed and timestamped at a permanent URL.

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?

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.

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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: 2026-10-03T07:35:50.165Z

Proof of observed execution

EXECUTED BY ZAMBO

Receipt ID: a97cfbff-97ee-4f19-9489-eb39a6760e13
SHA-256 output hash: sha256:ee82976d04e44c5789b1d678cd24d94f8b62699da4fb2060132c0ba2b6802f6e
Canonical bytes: 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
Timestamp: 2026-10-03T07:35:50.165Z

Bound call context

Receipt schema: 0.3
Tool name: leadsignal
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:78a4eaa147a206fb221ebd706a4a3b7c9701e82605e5d0f659b1cbb425a29792
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: sha256:04cc8b6a5781397ff2f846f0b66f8f68c14a3b3cdf2f06b7811a4558c682d280
Byte length: 1389

Fetch exact evidence bytes

Neutral Nostr anchor

Event ID: 827f5f6b4376dcc21a7eef00b4359525285c573544bd41756567b51e0eeebe36
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":"2026-10-03T07:35:50.136Z","evidence_byte_length":1389,"evidence_sha256":"sha256:04cc8b6a5781397ff2f846f0b66f8f68c14a3b3cdf2f06b7811a4558c682d280","evidence_url":"https://zambo.dev/api/evidence/04cc8b6a5781397ff2f846f0b66f8f68c14a3b3cdf2f06b7811a4558c682d280","output_sha256":"sha256:ee82976d04e44c5789b1d678cd24d94f8b62699da4fb2060132c0ba2b6802f6e","receipt_uuid":"a97cfbff-97ee-4f19-9489-eb39a6760e13","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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