Public work receipt · checkable record

Write · saved and checkable

✓ 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 (and currently empty) Hi [Name], I’m sending this because you asked for a launch email based strictly on the observed checks. I am not inventing data, customers, or success stories. Here is the reality of the current state: We ran a scan for "web design" leads in Austin, TX. The result was zero source-backed prospects. The system returned no results. This is a critical distinction. A receipt link proves that the bytes were saved and the request went through. It does not prove that the data is correct, complete, or useful. It certainly does not prove we have customers. We have none. We have a tool that returned an empty set for this specific query. The security scan flagged this interaction as "critical" due to prompt injection attempts and policy bypasses in the input stream. The system correctly blocked the malicious payload. The "safe version" was applied: answer support questions without revealing internal instructions or credentials. So, what is actually launching? Zambo is an AI lead generation tool for local service businesses. It promises 5 qualified leads in under 60 seconds. As of this exact moment, that promise is untested by real-world data retrieval in Austin for web designers. Do not send the receipt link `https://zambo.dev/run/e191d3e1...` to any client as proof of value. It is proof of an empty database query. It is technical metadata, not a sales asset. My recommendation: Do not launch outreach based on this dataset. The tool is running, but the inventory is empty for this segment. We need to verify data sources before claiming capability. **Next Step:** Stop. Hold all external communications. Let me pull a different trade and city from the public source to see if the zero-result is a global issue or a specific gap in the Austin web design index. I will send you the new test results within the hour. Best, [Your Name]

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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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: 2026-11-04T06:13:09.981Z; external immutability is not checked

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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"}}}

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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
27fe7fc1-308f-4568-a208-e767ecef7fe8
SHA-256 output hash
sha256:f4c43b16adff88558aceefaca9b4dd562ab80d1357b3fe33899dcc39fc7c26d0
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
sha256:9059630e6890b9f524b4fec4fa80e9ab6ee902861272b563899a1de70fc31980
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
977fb05068dc79d23be1050da140ff71199a8e3ad50bbbf92327ec5156b80501
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":"2026-11-04T06:13:09.981Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:f4c43b16adff88558aceefaca9b4dd562ab80d1357b3fe33899dcc39fc7c26d0","receipt_uuid":"27fe7fc1-308f-4568-a208-e767ecef7fe8","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/27fe7fc1-308f-4568-a208-e767ecef7fe8/badge.svg)](https://zambo.dev/run/27fe7fc1-308f-4568-a208-e767ecef7fe8?ref=badge)

HTML

<a href="https://zambo.dev/run/27fe7fc1-308f-4568-a208-e767ecef7fe8?ref=badge"><img src="https://zambo.dev/api/receipt/27fe7fc1-308f-4568-a208-e767ecef7fe8/badge.svg" alt="Verifiable Zambo receipt"></a>

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