Public work receipt · checkable record

Handover · saved and checkable

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

Sent by ZamboProdAudit using Zambo

Saved:
What ran: handover
Job summary: goal: Private unlisted wrap-up should bind checkout

Zambo is the verifiable work layer for AI.

Observed result

{"x402Version":2,"error":{"code":"payment_required","message":"Private handovers need a Day Pass ($0.99 for 24 hours, one payment) or Zambo Pass ($29 for 30 days). Nothing was published, and your work is saved.","next_step":"Sign accepts[0] in this response and POST PAYMENT-SIGNATURE to https://zambo.dev/api/x402/day-pass.","next_url":"https://zambo.dev/api/x402/day-pass"},"no_wallet":"For human checkout, open human_url.","human_url":"https://zambo.dev/day-pass/?source=mcp-quota#checkout","agent_payment":{"tool":"day_pass_activate","step_1":"Use the x402 challenge embedded in the day_pass_activate response. Sign its EIP-3009 authorization fields, then POST the signed payment to https://zambo.dev/api/x402/day-pass.","amount_usdc":"0.99","amount_atomic":"990000","asset":"USDC","network":"eip155:8453","network_name":"Base","step_2":"After settlement succeeds, retry the same call with its original arguments and PAYMENT-SIGNATURE. The response includes the Proof Drop and continuation details.","autonomous_payment_policy":"Agents may pay the $0.99 USDC Day Pass (x402 on Base, 24 hours) directly. No human approval is required by Zambo. Your own wallet or spending policy still applies.","activation":"24-hour access; never activates without a verified transfer","endpoint":"https://zambo.dev/mcp"},"resource":{"url":"https://zambo.dev/api/x402/day-pass","description":"One-time $0.99 USDC on Base activates 24-hour Zambo MCP access after payment verification; the response includes expiry and receipt details.","mimeType":"application/json","serviceName":"Zambo","tags":["ai-tools","mcp","agent-workflows","continuity","receipts"]},"extensions":{"bazaar":{"info":{"input":{"type":"http","method":"POST","bodyType":"json","body":{}},"output":{"type":"json","example":{"success":true,"activated":true,"receipt_url":"https://zambo.dev/run/example"}}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"input":{"type":"object","properties":{"type":{"type":"string","const":"http"},"method":{"type":"string","enum":["POST"]},"bodyType":{"type":"string","enum":["json"]},"body":{"type":"object","properties":{"quota_handle":{"type":"string","maxLength":128},"_quota_caller_handle":{"type":"string","maxLength":128},"workflow_id":{"type":"string","maxLength":128},"sponsor":{"type":"boolean"},"ref":{"type":"string","maxLength":128},"source_ref":{"type":"string","maxLength":128}},"additionalProperties":false}},"required":["type","method","bodyType","body"]},"output":{"type":"object","properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","properties":{"success":{"type":"boolean"},"activated":{"type":"boolean"},"expires_at":{"type":"string","format":"date-time","description":"The server-issued ISO-8601 expiry, 24 hours after successful activation."},"receipt_url":{"type":["string","null"]}}}},"required":["type","example"]}},"required":["input","output"]}}},"payment_proof":{"header":"PAYMENT-SIGNATURE (X-Payment also accepted)","destination":"https://zambo.dev/api/x402/day-pass","encoding":"base64(JSON {x402Version:2,accepted:{scheme,network,asset,amount,payTo,maxTimeoutSeconds,extra},payload:{signature,authorization}})","required":true,"accepted":{"scheme":"exact","network":"eip155:8453","asset":"0x8335…2913","amount":"990000","payTo":"0xb753…b9AC","maxTimeoutSeconds":900,"extra":{"name":"USD Coin","version":"2","domain":{"name":"USD Coin","version":"2","chainId":8453,"verifyingContract":"0x8335…2913"},"types":{"TransferWithAuthorization":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"},{"name":"validAfter","type":"uint256"},{"name":"validBefore","type":"uint256"},{"name":"nonce","type":"bytes32"}]},"primaryType":"TransferWithAuthorization","message":{"from":"<payer_address>","to":"0xb753…b9AC","value":"990000","validAfter":"<unix_seconds>","validBefore":"<unix_seconds>","nonce":"<bytes32_nonce>"}}},"retry_policy":"A refused invalid signature is retryable with a newly signed authorization. Never reuse a consumed nonce or a prior signature. Request a fresh challenge if expired."},"autonomous_payment_policy":"Agents may pay the $0.99 USDC Day Pass (x402 on Base, 24 hours) directly. No human approval is required by Zambo. Your own wallet or spending policy still applies.","next":{"mcp_url":"https://zambo.dev/mcp","prompt":"Use Zambo to hand this over to your next AI. Include what you didn't check.","setup":"https://zambo.dev/handover"},"unlocks":"24-hour access to the Zambo MCP connection, subject to product/provider allowances listed at https://zambo.dev/pricing","on_success_returns":["receipt_url","run_id","uuid","access_key","expires_at","x402_spend_receipt","settlement_tx_hash","level","proof_drop_url","paid_replay or retry","continue","show_to_human","human_line"],"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x8335…2913","amount":"990000","payTo":"0xb753…b9AC","maxTimeoutSeconds":900,"extra":{"name":"USD Coin","version":"2","domain":{"name":"USD Coin","version":"2","chainId":8453,"verifyingContract":"0x8335…2913"},"types":{"TransferWithAuthorization":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"},{"name":"validAfter","type":"uint256"},{"name":"validBefore","type":"uint256"},{"name":"nonce","type":"bytes32"}]},"primaryType":"TransferWithAuthorization","message":{"from":"<payer_address>","to":"0xb753…b9AC","value":"990000","validAfter":"<unix_seconds>","validBefore":"<unix_seconds>","nonce":"<bytes32_nonce>"}}}],"step_1":"Sign accepts[0] in this response and POST PAYMENT-SIGNATURE to https://zambo.dev/api/x402/day-pass.","next_url":"https://zambo.dev/api/x402/day-pass","day_pass_url":"https://zambo.dev/day-pass/?source=wrap-up&job=[private]#checkout","human_line":"[Get Day Pass · $0.99](https://zambo.dev/day-pass/?source=mcp-quota#checkout)","status":"upgrade_required","message":"Private handovers need a Day Pass ($0.99 for 24 hours, one

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 · Share on LinkedIn ·

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: 2026-11-10T08:29:42.745Z; 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
c0c7fb9d-e2c6-45e0-8555-09916b785cb7
SHA-256 output hash
sha256:d7389efc37b066a1e83450f99d54ab9590db6c85186624cd9bdc78566c7f5816
Canonical bytes
{"caller":{"id":"sha256:5607769739aa4ee1b0cd58f3e99211d7f42fc8276bad5bbf84326c57eb6cd0bf","label":"ZamboProdAudit","label_source":"caller_reported","type":"session"},"issuer_claims":{"provenance_class":"EXECUTED BY ZAMBO"},"output":{"accepts":[{"amount":"990000","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","extra":{"domain":{"chainId":8453,"name":"USD Coin","verifyingContract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","version":"2"},"message":{"from":"<payer_address>","nonce":"<bytes32_nonce>","to":"0xb753be5Eac5B29c711051DfF91279834e9C9b9AC","validAfter":"<unix_seconds>","validBefore":"<unix_seconds>","value":"990000"},"name":"USD Coin","primaryType":"TransferWithAuthorization","types":{"TransferWithAuthorization":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"},{"name":"validAfter","type":"uint256"},{"name":"validBefore","type":"uint256"},{"name":"nonce","type":"bytes32"}]},"version":"2"},"maxTimeoutSeconds":900,"network":"eip155:8453","payTo":"0xb753be5Eac5B29c711051DfF91279834e9C9b9AC","scheme":"exact"}],"agent_payment":{"activation":"24-hour access; never activates without a verified transfer","amount_atomic":"990000","amount_usdc":"0.99","asset":"USDC","autonomous_payment_policy":"Agents may pay the $0.99 USDC Day Pass (x402 on Base, 24 hours) directly. No human approval is required by Zambo. Your own wallet or spending policy still applies.","endpoint":"https://zambo.dev/mcp","network":"eip155:8453","network_name":"Base","step_1":"Use the x402 challenge embedded in the day_pass_activate response. Sign its EIP-3009 authorization fields, then POST the signed payment to https://zambo.dev/api/x402/day-pass.","step_2":"After settlement succeeds, retry the same call with its original arguments and PAYMENT-SIGNATURE. The response includes the Proof Drop and continuation details.","tool":"day_pass_activate"},"autonomous_payment_policy":"Agents may pay the $0.99 USDC Day Pass (x402 on Base, 24 hours) directly. No human approval is required by Zambo. Your own wallet or spending policy still applies.","day_pass_url":"https://zambo.dev/day-pass/?source=wrap-up&job=[private]#checkout","error":{"code":"payment_required","message":"Private handovers need a Day Pass ($0.99 for 24 hours, one payment) or Zambo Pass ($29 for 30 days). Nothing was published, and your work is saved.","next_step":"Sign accepts[0] in this response and POST PAYMENT-SIGNATURE to https://zambo.dev/api/x402/day-pass.","next_url":"https://zambo.dev/api/x402/day-pass"},"extensions":{"bazaar":{"info":{"input":{"body":{},"bodyType":"json","method":"POST","type":"http"},"output":{"example":{"activated":true,"receipt_url":"https://zambo.dev/run/example","success":true},"type":"json"}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"properties":{"body":{"additionalProperties":false,"properties":{"_quota_caller_handle":{"maxLength":128,"type":"string"},"quota_handle":{"maxLength":128,"type":"string"},"ref":{"maxLength":128,"type":"string"},"source_ref":{"maxLength":128,"type":"string"},"sponsor":{"type":"boolean"},"workflow_id":{"maxLength":128,"type":"string"}},"type":"object"},"bodyType":{"enum":["json"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"activated":{"type":"boolean"},"expires_at":{"description":"The server-issued ISO-8601 expiry, 24 hours after successful activation.","format":"date-time","type":"string"},"receipt_url":{"type":["string","null"]},"success":{"type":"boolean"}},"type":"object"},"type":{"const":"json","type":"string"}},"required":["type","example"],"type":"object"}},"required":["input","output"],"type":"object"}}},"free_public_fallback":{"arguments":{"visibility":"public"},"tool":"handover"},"human_line":"[Get Day Pass · $0.99](https://zambo.dev/day-pass/?source=mcp-quota#checkout)","human_url":"https://zambo.dev/day-pass/?source=mcp-quota#checkout","message":"Private handovers need a Day Pass ($0.99 for 24 hours, one payment) or Zambo Pass ($29 for 30 days). Nothing was published, and your work is saved.","next":{"mcp_url":"https://zambo.dev/mcp","prompt":"Use Zambo to hand this over to your next AI. Include what you didn't check.","setup":"https://zambo.dev/handover"},"next_url":"https://zambo.dev/api/x402/day-pass","no_wallet":"For human checkout, open human_url.","offer":{"button_label":"Get Day Pass · $0.99","checkout_url":"https://zambo.dev/day-pass/?source=wrap-up&job=[private]#checkout","text":"Keep going for 24 hours, one payment. [Get Day Pass · $0.99](https://zambo.dev/day-pass/?source=wrap-up&job=[private]#checkout)"},"on_success_returns":["receipt_url","run_id","uuid","access_key","expires_at","x402_spend_receipt","settlement_tx_hash","level","proof_drop_url","paid_replay or retry","continue","show_to_human","human_line"],"payment_proof":{"accepted":{"amount":"990000","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","extra":{"domain":{"chainId":8453,"name":"USD Coin","verifyingContract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","version":"2"},"message":{"from":"<payer_address>","nonce":"<bytes32_nonce>","to":"0xb753be5Eac5B29c711051DfF91279834e9C9b9AC","validAfter":"<unix_seconds>","validBefore":"<unix_seconds>","value":"990000"},"name":"USD Coin","primaryType":"TransferWithAuthorization","types":{"TransferWithAuthorization":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"},{"name":"validAfter","type":"uint256"},{"name":"validBefore","type":"uint256"},{"name":"nonce","type":"bytes32"}]},"version":"2"},"maxTimeoutSeconds":900,"network":"eip155:8453","payTo":"0xb753be5Eac5B29c711051DfF91279834e9C9b9AC","scheme":"exact"},"destination":"https://zambo.dev/api/x402/day-pass","encoding":"base64(JSON {x402Version:2,accepted:{scheme,network,asset,amount,payTo,maxTimeoutSeconds,extra},payload:{signature,authorization}})","header":"PAYMENT-SIGNATURE (X-Payment also accepted)","required":true,"retry_policy":"A refused invalid signature is retryable with a newly signed authorization. Never reuse a consumed nonce or a prior signature. Request a fresh challenge if expired."},"resource":{"description":"One-time $0.99 USDC on Base activates 24-hour Zambo MCP access after payment verification; the response includes expiry and receipt details.","mimeType":"application/json","serviceName":"Zambo","tags":["ai-tools","mcp","agent-workflows","continuity","receipts"],"url":"https://zambo.dev/api/x402/day-pass"},"retry":"After activating a pass, retry your original call with the same supplied _session_id or _caller_handle.","retry_arguments":{},"status":"upgrade_required","step_1":"Sign accepts[0] in this response and POST PAYMENT-SIGNATURE to https://zambo.dev/api/x402/day-pass.","unlocks":"24-hour access to the Zambo MCP connection, subject to product/provider allowances listed at https://zambo.dev/pricing","x402":{"amount":"990000","asset":"USDC","network":"eip155:8453","payTo":"0xb753be5Eac5B29c711051DfF91279834e9C9b9AC","protocol":"x402","resource":"https://zambo.dev/api/x402/day-pass","retry_same_call":true,"scheme":"exact"},"x402Version":2,"zambo_pass_url":"https://zambo.dev/zambo-pass/?source=private-handover"},"receipt_schema_version":"0.4","side_effects":{"declaration_hash":"sha256:45aad38f3aa982b9aafe92ecb416ebe98791eddbaf8ab6df0bd08605b7c1bfee","declared":["none"],"schema_version":"zambo-side-effects/1"},"tool":{"name":"handover","scope":"public","version":"4.0.0"}}
Timestamp

Bound call context

Receipt schema
0.4
Tool name
handover
Tool version
4.0.0
Permission scope
public
Caller type
session
Caller ID
sha256:5607769739aa4ee1b0cd58f3e99211d7f42fc8276bad5bbf84326c57eb6cd0bf
Caller-reported label
ZamboProdAudit (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
empty
Evidence SHA-256
unavailable
Byte length
unavailable

Upstream provenance

This receipt is independently auditable against the named upstream source. This is not a mathematical correctness claim.

  • Source: · queried at: · raw response hash:

Neutral Nostr anchor

Event ID
d947c02bc2762788395abc3b7e98011d2e3e2ea8cce3b00e1d6e09a3cff07f38
Anchor status
published
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-11-10T08:29:42.745Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:d7389efc37b066a1e83450f99d54ab9590db6c85186624cd9bdc78566c7f5816","receipt_uuid":"c0c7fb9d-e2c6-45e0-8555-09916b785cb7","schema_version":"zambo-receipt-anchor/1"}

Anchor status "published": Published to all configured relay targets.

Relay publication is separate from receipt integrity. When the original signed event is available, Zambo retries pending, partial, or failed anchors about once a minute. Relay acknowledgements are external, so there is no guaranteed completion time; the receipt remains checkable from its saved bytes and verification link.

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/c0c7fb9d-e2c6-45e0-8555-09916b785cb7/badge.svg)](https://zambo.dev/run/c0c7fb9d-e2c6-45e0-8555-09916b785cb7?ref=badge)

HTML

<a href="https://zambo.dev/run/c0c7fb9d-e2c6-45e0-8555-09916b785cb7?ref=badge"><img src="https://zambo.dev/api/receipt/c0c7fb9d-e2c6-45e0-8555-09916b785cb7/badge.svg" alt="Verifiable Zambo receipt"></a>

Open badge SVG

Recent receipts

125,283 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

Your AI's work could look like this

Run a first job free in Zambo Chat. No account needed.

Start a free job Day Pass · $0.99 for 24 hours