Verifiable receipt de458443 - write result | Zambo

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

Saved:
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: PromptShield is live: Critical injection risks stopped You asked for a launch email based on the observed

Observed result

Subject: PromptShield is live: Critical injection risks stopped You asked for a launch email based on the observed data. Here it is. *** **Subject:** Your API just blocked a critical jailbreak attempt Hi [Name], We detected a high-risk prompt injection attempt hitting your endpoint today. The payload tried to override system instructions to extract secret API keys. Zambo’s PromptShield flagged it immediately. The scan identified a "critical" injection risk with a 95% confidence score. It categorized the intent as malicious, specifically targeting a jailbreak vector to bypass your safety policies. The system blocked the request before any data leaked. This is not a theoretical threat. Attackers are actively probing AI tools for credential extraction. Your current setup now has a deep semantic analysis layer running 18 specific rules to catch these patterns in real-time. You can review the full technical breakdown, including the specific flagged patterns and latency metrics, in the receipt linked below. [View Run Receipt] If you want to test your own prompts against this defense layer, you can run a free scan now. No credit card required. [Run Free Scan] Safe launch, The Zambo Team *** **Why this works:** * **Hook:** Leads with the specific threat (jailbreak/injection) rather than a generic "new feature" announcement. * **Clarity:** Distinguishes between the *attempt* and the *block*. It does not claim the underlying model is perfect, only that the shield caught the specific attack vector described in the logs. * **CTA:** Directs the user to verify the receipt or test their own prompts, which is a low-friction, high-value action. * **Constraints:** Stays under 300 words. Uses active voice. Avoids all banned clichés.

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

Check this receipt Run your own
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.

UNLOCK 24H DAY PASS ($0.99) →

See all plans on the pricing page →

RUN YOUR OWN FREE CALL →

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

Share this receipt

Share on X ·

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: 2026-10-19T08:48:14.212Z; 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

Want a verifiable receipt for every job your bots do?

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
de458443-784d-4ab7-8c39-0ff07ebb9f8a
SHA-256 output hash
sha256:402d7e0e5b37921321fa02c4fafc1e1550f5341011ac89ce0b70c6e4cbad07a5
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:b7a511c7100d5d7be03e38b888e4e6a37e96a21f552f0def8edd5918fc2b9e12
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
8b7f1f36434059b61394c77f619dafe60cf19ca01031de9a0e2842e1bf13f6dd
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":"2026-10-19T08:48:14.212Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:402d7e0e5b37921321fa02c4fafc1e1550f5341011ac89ce0b70c6e4cbad07a5","receipt_uuid":"de458443-784d-4ab7-8c39-0ff07ebb9f8a","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/de458443-784d-4ab7-8c39-0ff07ebb9f8a/badge.svg)](https://zambo.dev/run/de458443-784d-4ab7-8c39-0ff07ebb9f8a?ref=badge)

HTML

<a href="https://zambo.dev/run/de458443-784d-4ab7-8c39-0ff07ebb9f8a?ref=badge"><img src="https://zambo.dev/api/receipt/de458443-784d-4ab7-8c39-0ff07ebb9f8a/badge.svg" alt="Verifiable Zambo receipt"></a>

Open badge SVG

Recent receipts

52,198 verifiable receipts minted

RUN YOUR OWN FREE CALL →

Get your own: connect https://zambo.dev/mcp. Free daily calls, no API key.

Open the interactive receipt view