Public work receipt · checkable record

Receipt publication · saved and checkable

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

Sent using Zambo

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

Zambo is the verifiable work layer for AI.

Observed result

schema: zambo.redacted-receipt-publication/1 redacted projection: true source receipt id: 3ea1c886-a4a8-48f6-99f8-96f5a6b86887 source output hash: sha256:054fa155c0474f0b4b83a34da05f031109b130744ca325de0f5cd68e48ae82b1 source tool: zambo_check publication notice: This is a newly committed redacted publication copy, not the original tool output. The original commitment is unchanged and its private bytes are withheld. output: {"status":"uncertain","confidence":"medium","reason":"The operation is claimed or observed, not independently verified.","evidence":[{"id":"http_1bedc984588d","kind":"http_observation","source":"https://zambo.dev/verify/","observed":"Public endpoint responded with HTTP 200.","scope":"reachability, response metadata, page title/description, and content hash","fetched_at":"2026-10-03T10:15:39.898Z","http_status":200,"content_type":"text/html; charset=utf-8","sha256":"8486efb98b266d82b8219db8381f029dae519ee6f71862cecb8e5d1a9e31bff9"},{"id":"observed_44db23fd56c9","kind":"execution_receipt","observed":"The supplied context indicates the operation was observed, but does not establish independent verification.","scope":"host-reported execution state"}],"assertion_state":{"claimed":false,"observed":true,"verified":false,"scope":"not independently verified"},"freshness":{"checked_at":"2026-10-03T10:15:40.024Z","source_count":1,"newest_source_at":"2026-10-03T10:15:39.898Z"},"conflicts":[],"risk":{"level":"high","side_effects":true,"reversible":"[private]","approval_required":true,"reasons":["The request concerns an external action or execution; Zambo does not authorize it from a natural-language request alone."]},"provenance":{"method":"deterministic observations plus caller-supplied context","sources":["https://zambo.dev/verify/"],"limitations":["A reachable source is not proof that its claims are true.","Caller-supplied claimed/verified fields are not independently authenticated."]},"recommended_action":"verify_more","next_action":"verify","proof":{"type":"integrity_hash","hash":"46c2fa449e87f77125e0bc7ecc4012a0a97b3ae93b0695faabfe9f837044ea6b","recorded_at":"2026-10-03T10:15:40.024Z","scope":"integrity of this check response and its observed evidence; not a universal truth certificate","independently_verifiable":false,"note":"This hash is not a persisted proof certificate. Use the dedicated proof capability only when a durable certificate is explicitly requested."},"next_capability":"zambo_check","zambo":{"capability":"zambo_check","next_capability":"zambo_check","mcp_available":true},"meta":{"check_type":"execution","latency_ms":126,"tool_calls":0,"upstream_latency_ms":126,"cache_hit":false,"free_limit":"20/day/IP"}}

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 this receipt?

This is a verifiable receipt for a journal entry. It confirms receipt, redaction, timestamping, and chaining. It does not attest to execution.

What the receipt can and cannot prove

What is this?

Zambo's receipt store reports a journal entry from an agent or local hook. The SHA-256 commitment covers the receipt bytes. The provenance label is only a claim, not proof of issuer identity or that the reported action happened.

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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: 2026-11-07T01:56:27.497Z; 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

LOGGED BY AGENT

The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.

Receipt ID
da34eb37-d69c-55ae-aa9e-69f4c0ea180a
SHA-256 output hash
sha256:55d48511c9f918755748c18ad20790e82af9e4f399bb557153c567414aa68725
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.4
Tool name
receipt_publication
Tool version
4.0.0
Permission scope
public
Caller type
session
Caller ID
sha256:0905da24e1f6aa77d6ccd994560fc01b3de80fb5899d9a97ba377b2a22a94075
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

Neutral Nostr anchor

Event ID
e2abf3418153d447c513c4651ded5f865ab15442ae1bb82119c5037d400e998a
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":"2026-11-07T01:56:27.497Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:55d48511c9f918755748c18ad20790e82af9e4f399bb557153c567414aa68725","receipt_uuid":"da34eb37-d69c-55ae-aa9e-69f4c0ea180a","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

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/da34eb37-d69c-55ae-aa9e-69f4c0ea180a/badge.svg)](https://zambo.dev/run/da34eb37-d69c-55ae-aa9e-69f4c0ea180a?ref=badge)

HTML

<a href="https://zambo.dev/run/da34eb37-d69c-55ae-aa9e-69f4c0ea180a?ref=badge"><img src="https://zambo.dev/api/receipt/da34eb37-d69c-55ae-aa9e-69f4c0ea180a/badge.svg" alt="Verifiable Zambo receipt"></a>

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