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

Zambo is the verifiable work layer for AI.

Observed result

Subject: Zambo’s launch: Proof of execution, not just promises Hi [Name], You’re likely tired of AI tools that claim to "do the work" but only deliver vague summaries. I’m writing because Zambo just launched with a different approach: verifiable execution. We built Zambo to bridge the gap between intent and completion. It doesn’t just suggest actions; it executes them and provides cryptographic receipts for every step. Whether you’re processing data, scanning for security risks, or researching leads, the output includes a link to a public log. This proves exactly what ran, when it ran, and what the result was. No black boxes. No guessing. Just auditable facts. Right now, Zambo is live and ready for your workflow. You can test it immediately by asking it to run a simple task—like a semantic analysis or a lead search—and inspect the receipt it generates. If the results don’t match the proof, you don’t pay. That’s the standard. We’re not asking you to trust our marketing. We’re asking you to inspect the logs. To get started, simply use the phrase: **"use zambo to hand this over to [client name]"**. This triggers the handoff protocol, ensuring the final output is packaged with its full audit trail, ready for you to review or share with your team. The free tier is unlimited for core execution calls. No credit card required. Just run a task, check the receipt, and see if the proof holds up. If the receipts look solid, let’s talk about scaling this into your daily ops. If not, no hard feelings. Best, [Your Name] Head of Product, 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.

Keep the work moving

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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Or re-run this exact call, using the same tool and arguments.

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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: 2026-10-25T16:57:59.140Z; external immutability is not checked

Get proof like this from your own AI

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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Add Zambo Receipt Bot to your team · File this in Receipt Bot

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
982f89b5-9f6d-415d-9491-a502017d5539
SHA-256 output hash
sha256:b0dc91ff7c8bc247c00fc10da3668261250e2f7a94a1769a7d6f532863693784
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:a2e5f464f9b1ab79cfcd1393277dc55dc60d1786513b5bd25f3aad4660070b27
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
no_upstream_bytes_captured
Evidence SHA-256
unavailable
Byte length
unavailable

Neutral Nostr anchor

Event ID
1b5941d3555df9739e414f89ce385556612e36dc37746e4eca09a6d5c7807184
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":"2026-10-25T16:57:59.140Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:b0dc91ff7c8bc247c00fc10da3668261250e2f7a94a1769a7d6f532863693784","receipt_uuid":"982f89b5-9f6d-415d-9491-a502017d5539","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/982f89b5-9f6d-415d-9491-a502017d5539/badge.svg)](https://zambo.dev/run/982f89b5-9f6d-415d-9491-a502017d5539?ref=badge)

HTML

<a href="https://zambo.dev/run/982f89b5-9f6d-415d-9491-a502017d5539?ref=badge"><img src="https://zambo.dev/api/receipt/982f89b5-9f6d-415d-9491-a502017d5539/badge.svg" alt="Verifiable Zambo receipt"></a>

Open badge SVG

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