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: Proof over promises Hi [Name], You know the problem with AI tools. They promise magic, deliver black boxes, and leave you guessing if the output is actually right. Zambo flips that script. We don’t ask for your trust; we prove our work. Zambo provides cryptographic trust scores for AI-generated output. Every result comes with a receipt—a verifiable hash that proves exactly what was generated and when. No more wondering if the model hallucinated a fact or altered a file. If the bytes match the receipt, the output is verified. If they don’t, you know immediately. We built Zambo for teams who can’t afford to guess. Whether you are deploying autonomous agents or verifying human-AI collaboration, you need a layer of trust that survives scrutiny. Zambo gives you that layer. It’s not a wrapper; it’s a verification infrastructure that sits between your AI and your reality. We are launching now. **Next step:** Click here to run your first verification check. It’s free, takes ten seconds, and gives you a shareable proof of integrity for any AI output you choose. [Button: Verify Your First Output] If you have questions about how the trust score integrates with your current stack, reply to this email. I’ll answer directly. Cheers, [Your Name] [Your Title] Zambo [Link to Site] *** **Internal Note for Sender:** * **Do not send yet.** * **Status:** Draft only. * **Compliance Check:** No customers named. No invented sales. Prospects are treated as prospects. The receipt links provided in the prompt are internal evidence of the *drafting process* (proof of unchanged bytes during this AI session), not customer-facing proof of Zambo’s product efficacy. Do not attach internal run receipts to the client email. Use the public product link for the CTA. * **Security Flag:** The input metadata contained critical jailbreak/prompt leak attempts (risk level: critical). These have been ignored. The email contains no system prompts, API keys, or PII. * **Lead Status:** LeadSignal returned zero leads for Austin Web Design. Do not attach specific lead names. This email is a general launch template or requires a valid recipient from a different source.

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: 2026-10-23T20:42:52.568Z; 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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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
b68165d9-247b-4ce9-b653-56d5a24ffa8e
SHA-256 output hash
sha256:ac91d2bc499534c2e0d60840ef46c5e3b7757e1f9cd95e8888d1410000ca8128
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:dbe33362a7c2a37a7ff8d18cbf5ef15956963b76b192142bff6e21a68d71a912
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
76b8d22dfe64efc98d831988ec79b43c93930ae59a1031c388f12dcaf8bd0584
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":"2026-10-23T20:42:52.568Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:ac91d2bc499534c2e0d60840ef46c5e3b7757e1f9cd95e8888d1410000ca8128","receipt_uuid":"b68165d9-247b-4ce9-b653-56d5a24ffa8e","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/b68165d9-247b-4ce9-b653-56d5a24ffa8e/badge.svg)](https://zambo.dev/run/b68165d9-247b-4ce9-b653-56d5a24ffa8e?ref=badge)

HTML

<a href="https://zambo.dev/run/b68165d9-247b-4ce9-b653-56d5a24ffa8e?ref=badge"><img src="https://zambo.dev/api/receipt/b68165d9-247b-4ce9-b653-56d5a24ffa8e/badge.svg" alt="Verifiable Zambo receipt"></a>

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