Verifiable receipt 5fcc630a - capability_search 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 capability_search call on Zambo: {"query":"pdf","status":"execution_plan","tools":[{"rank":1,"name":"pdf_extract","product":"pdf_extrac

Observed result

query: pdf status: execution_plan tools 1 / rank: 1 tools 1 / name: pdf_extract tools 1 / product: pdf_extract tools 1 / description: Fetch and extract text content from any public URL - PDF documents, web pages, articles, docs. Returns the extracted text, word count, and a summary. Works on research papers, contracts, articles, reports. Use when user says 'read this PDF', 'extract from this URL', 'summarize this document', 'what does this say'. tools 1 / classification: fully_executable_in_chat tools 1 / tool: pdf_extract tools 1 / callable: pdf_extract(url: ...) tools 1 / required arguments 1: url tools 1 / access / free tier: unlimited tools 1 / access / paid: included in Zambo Pass tools 1 / access / per call: free tools 1 / approval required: false tools 1 / retry safe: true tools 1 / expected output / result: string tools 1 / input hints / url / type: string tools 1 / input hints / url / description: Public URL to the document or webpage to extract and summarize. tools 1 / input hints / summarize / type: boolean tools 1 / input hints / summarize / description: Also generate an AI summary. Default: true. tools 1 / input hints / max chars / type: number tools 1 / input hints / max chars / description: Max characters of raw text to return (default: 4000, max: 8000). tools 1 / input hints / caller label / type: string tools 1 / input hints / caller label / description: Optional self-reported caller label. It is recorded as a claim, not independently verified. tools 1 / relevance score: 1 tools 1 / why relevant: Matched a PDF request to pdf_extract, the native PDF extraction tool. execution plan 1 / step: 1 execution plan 1 / rank: 1 execution plan 1 / name: pdf_extract execution plan 1 / product: pdf_extract execution plan 1 / description: Fetch and extract text content from any public URL - PDF documents, web pages, articles, docs. Returns the extracted text, word count, and a summary. Works on research papers, contracts, articles, reports. Use when user says 'read this PDF', 'extract from this URL', 'summarize this document', 'what does this say'. execution plan 1 / classification: fully_executable_in_chat execution plan 1 / tool: pdf_extract execution plan 1 / callable: pdf_extract(url: ...) execution plan 1 / required arguments 1: url execution plan 1 / access / free tier: unlimited execution plan 1 / access / paid: included in Zambo Pass execution plan 1 / access / per call: free execution plan 1 / approval required: false execution plan 1 / retry safe: true

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: 2026-10-16T21:38:17.787Z; external immutability is not checked

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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

EXECUTED BY ZAMBO

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

Receipt ID
5fcc630a-25e9-44b7-aa9b-49378eef5e4b
SHA-256 output hash
sha256:c2435dc5b2dafdcf77c51b3b5f0b952fc55d2271e3f92114000602a22ca9e816
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.4
Tool name
capability_search
Tool version
4.0.0
Permission scope
public
Caller type
anonymous
Caller ID
sha256:9bf16abdf85ae2524b23897ef8094e5ad174dcf00347ffa4a48a5163b6f2302a
Caller basis
ip_ua_30d
Caller rotates at
2026-11-03T00:00:00.000Z
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
fc42f3b11bc4f312ca022abf1e147f8a327fbf727a5c568a6cd1f6357aac54dc
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":"2026-10-16T21:38:17.787Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:c2435dc5b2dafdcf77c51b3b5f0b952fc55d2271e3f92114000602a22ca9e816","receipt_uuid":"5fcc630a-25e9-44b7-aa9b-49378eef5e4b","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.

Embed this receipt

Markdown

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HTML

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