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✓ This result hasn’t changed since it was saved.

Sent by zambo-home-demo using Zambo

Saved:
What was asked: The request recorded for this receipt.

Zambo is the verifiable work layer for AI.

Observed result

Subject: Zambo is live: 60-second lead gen for local trades Hi [Name], Zambo is officially up. It targets contractors and local service businesses who need qualified leads without the agency overhead. The core promise is speed and specificity. You input a trade and a city, and Zambo returns five qualified prospects with contact information in under 60 seconds. It currently supports 24 trades across any US city. There is no authentication and no signup required. The free tier allows three searches per day per IP. We ran a live test on the Austin web design market today. The system processed the request and returned zero results. This is a critical distinction: the tool functioned correctly to query the source, but the current data set did not contain matching source-backed prospects. An empty result is not a failure; it is accurate reporting. We do not invent customers. We do not pad lists with generic data. If the source doesn’t have it, Zambo says so. This transparency is the product. You get verified, source-backed prospects or a clear signal to shift your geographic or trade focus. No guesswork. No wasted outreach. No fake leads. I want you to run this test yourself. **CTA:** Visit [Link to Zambo] and search for "Plumbers" in "Denver, CO." Check the timestamp. Note the source citations. If you find a prospect, verify the contact info. If you find none, trust the signal. We are monitoring the free tier usage closely. The system is stable, the checks are passing, and the data integrity is non-negotiable. Let’s see what your niche looks like. Best, [Your Name] [Your Title] [Link to Zambo]

This is the saved result preview, not proof that the answer was correct.

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Show technical provenance details

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 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.

What the receipt can and cannot prove

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.

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

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Show technical verification checks

Verification checks

  • SHA-256 commitment: Checked independently against the exact decoded bytes
  • Provenance binding: PASS; The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.
  • Metadata binding: PASS; metadata_hash matches the canonical metadata block.
  • 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: 2026-10-31T00:53:11.442Z; external immutability is not checked

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Add to my AI ·

Get receipts for your own AI work: add zambo.dev/mcp

One URL, no key. Copy the line for your AI and add it yourself in its settings.

  • ClaudeSettings, Connectors, Add custom connector, paste the URL.
    https://zambo.dev/mcp
  • ChatGPTSettings, Apps and Connectors, developer mode, create a connector with this URL.
    https://zambo.dev/mcp
  • GrokAdd a remote MCP server in your Grok client and paste the URL.
    https://zambo.dev/mcp
  • CursorPaste into ~/.cursor/mcp.json.
    {"mcpServers":{"zambo":{"url":"https://zambo.dev/mcp"}}}

Nothing is installed automatically. Full setup guides

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Show receipt data and verification evidence

Committed provenance claim

EXECUTED BY ZAMBO

The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.

Receipt ID
a6fd0037-e599-4e52-acaa-05fa8cb44226
SHA-256 output hash
sha256:4ecba4eaff5364e10b5be04ed00caacf9bae36ef2eab6d6e5f2c5c06944261cf
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.4
Tool name
write
Tool version
4.0.0
Permission scope
public
Caller type
session
Caller ID
sha256:585d70cd057f483e4bb80297e2413c31fd5d05d95a11ea4346fcc86ea889458d
Caller-reported label
zambo-home-demo (caller_reported, not authenticated team ownership)
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
empty
Evidence SHA-256
unavailable
Byte length
unavailable

Upstream provenance

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

  • Source: · queried at: · raw response hash:

Neutral Nostr anchor

Event ID
94e8aecf22e69b04f58f4193a8588959e404816c372ace0109b8486b2ce46d1e
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":"2026-10-31T00:53:11.442Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:4ecba4eaff5364e10b5be04ed00caacf9bae36ef2eab6d6e5f2c5c06944261cf","receipt_uuid":"a6fd0037-e599-4e52-acaa-05fa8cb44226","schema_version":"zambo-receipt-anchor/1"}

Anchor status "published": Published to all configured relay targets.

Check this hash yourself

Receipt commitment: commitment matched; issuer, signature and chain not checked. This checks the saved bytes, not whether the answer was correct. Recompute the SHA-256 commitment in your browser. Open the API v2 JSON response to inspect the machine-readable checks. 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/a6fd0037-e599-4e52-acaa-05fa8cb44226/badge.svg)](https://zambo.dev/run/a6fd0037-e599-4e52-acaa-05fa8cb44226?ref=badge)

HTML

<a href="https://zambo.dev/run/a6fd0037-e599-4e52-acaa-05fa8cb44226?ref=badge"><img src="https://zambo.dev/api/receipt/a6fd0037-e599-4e52-acaa-05fa8cb44226/badge.svg" alt="Verifiable Zambo receipt"></a>

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