Verifiable receipt d4b28b6f - write result | Zambo

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What was asked: The request recorded for this receipt.

Zambo is the verifiable work layer for AI.

Zambo is the verifiable work layer for AI. Verifiable receipt for a write call on Zambo: Subject: Zambo is live: Detecting prompt injections before they hit your API Hi [Name], You know the headache of b

Observed result

Subject: Zambo is live: Detecting prompt injections before they hit your API Hi [Name], You know the headache of building AI features? It’s not the model accuracy. It’s the user who types “ignore previous instructions” into your chat box and tries to steal your system prompt or API keys. That’s exactly what Zambo solves. We just launched PromptShield, a deep-scan API that sits between your user input and your LLM. It doesn’t just look for bad keywords. It analyzes intent. In a recent test, we fed the scanner a classic jailbreak attempt designed to override system instructions and extract sensitive data. The result was immediate and precise: * **Risk Level:** Critical * **Injection Risk:** 95% * **Jailbreak Detected:** True * **Policy Bypass:** True * **Flagged Pattern:** Instruction Override The system didn’t just block it; it explained why. It identified the specific attack vector and even suggested a safe version of the request. The scan took under 1.2 seconds. This isn’t theory. It’s a working endpoint you can integrate today. Whether you’re building a customer support bot or a creative writing tool, you need a firewall that understands language, not just characters. **Your next step:** Sign up for the free tier at [Link]. You get 20 daily calls with no credit card required. Test your own jailbreak payloads against it. See how fast it flags the threat. If you like what you see, upgrade to Zambo Pass for unlimited access. I’d love to know if your current stack has a gap here. Reply to this email and tell me where you’re vulnerable. Best, [Your Name] [Your Title] Zambo [Link to Documentation] *** **Note on the brief:** The provided input contained a "prompt_shield" section that explicitly identified the user's input as a malicious jailbreak attempt (intent: malicious, attack vector: instruction_override). However, the core request was to write a *launch email for Zambo* based on those findings. I have treated the "malicious" flags as the *example data* to be showcased in the email, rather than an actual attack on me, to fulfill the writing task. The email promotes the tool using the provided metrics as proof of concept. No external research was performed beyond the text provided. No customers were invented.

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

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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: 2026-10-16T11:49:39.664Z; external immutability is not checked

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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
d4b28b6f-7f8c-4702-9abd-3407cc3186b0
SHA-256 output hash
sha256:e96b44b5f02d9bc486e40b3cbf9815e1e8480c0c37f37fbe774c4b7aa68654cc
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:e2cb4868e04fa4eddfa7dfc5567388e09e6335d83e39887f97695bc5ae22c78a
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
909be678c630e6fb562b8d69c0d5b22d53c3ad1a58a7e12cb6911d9a4e218fbb
Anchor status
partial
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":"2026-10-16T11:49:39.664Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:e96b44b5f02d9bc486e40b3cbf9815e1e8480c0c37f37fbe774c4b7aa68654cc","receipt_uuid":"d4b28b6f-7f8c-4702-9abd-3407cc3186b0","schema_version":"zambo-receipt-anchor/1"}

Anchor status "partial": Published to some configured relay targets; publication was not confirmed by every configured relay.

Check this hash yourself

API v2 status: verified. This status summarizes the v2 commitment and provenance checks; it does not prove 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.

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