Verifiable Receipt 9924c86b — day_pass_activate result | Zambo

Verifiable receipt for a day_pass_activate call on Zambo: { "x402Version": 1, "human_url": "https://zambo.dev/day-pass", "usage": { "session_calls": 0, "session

What is this?

An AI agent did real work through Zambo, and this page is the proof. The SHA-256 hash below is a fingerprint of exactly what the agent produced — change one character of the output and the fingerprint changes. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too — anyone can look it up by the event ID below. You don't have to take the agent's word for it. Check the hash yourself.

Observed result

{
  "x402Version": 1,
  "human_url": "https://zambo.dev/day-pass",
  "usage": {
    "session_calls": 0,
    "session_calls_scope": "this_session",
    "quota_calls": 0,
    "quota_calls_scope": "caller_quota_window",
    "tools_used": 0,
    "tool_breakdown": {},
    "human_url": "https://zambo.dev/day-pass",
    "reset_at": "2026-09-20T00:00:00.000Z",
    "quota_tier": "free_20"
  },
  "agent_payment": {
    "tool": "day_pass_activate",
    "step_1": "GET https://zambo.dev/api/x402/day-pass without payment to receive the live challenge",
    "amount_usdc": "1.49",
    "amount_atomic": "1490000",
    "asset": "USDC",
    "network": "eip155:8453",
    "network_name": "Base",
    "step_2": "POST https://zambo.dev/api/x402/day-pass with X-Payment: <base64 JSON x402 envelope>",
    "activation": "24-hour access; never activates without a verified transfer",
    "endpoint": "https://zambo.dev/api/mcp"
  },
  "resource": {
    "url": "https://zambo.dev/api/x402/day-pass",
    "description": "Zambo Day Pass for the Trust Layer: give your AI hands through the free MCP connection, pay $1.49 in Base USDC, and receive a verifiable receipt.",
    "mimeType": "application/json"
  },
  "payment_proof": {
    "header": "X-Payment",
    "destination": "https://zambo.dev/api/x402/day-pass",
    "encoding": "base64(JSON {x402Version,scheme,network,payload:{signature,authorization}})",
    "required": true
  },
  "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"
  ],
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "asset": "[REDACTED_ADDRESS]",
      "amount": "1490000",
      "payTo": "[REDACTED_ADDRESS]",
      "maxTimeoutSeconds": 900,
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "domain": {
          "name": "USD Coin",
          "version": "2",
          "chainId": 8453,
          "verifyingContract": "[REDACTED_ADDRESS]"
        },
        "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": "[REDACTED_ADDRESS]",
          "value": "1490000",
          "validAfter": "<unix_seconds>",
          "validBefore": "<unix_seconds>",
          "nonce": "<bytes32_nonce>"
        }
      }
    }
  ],
  "agent_flow": "Sign the typed EIP-3009 TransferWithAuthorization message from accepts[0].extra, base64-encode the x402 JSON envelope, and retry with x_payment."
}

Keep the work moving

This receipt proves the call completed. When the free allowance is not enough, choose the access path that fits the job.

UNLOCK 24H DAY PASS ($1.49) → ZAMBO PASS $49 →

RUN YOUR OWN FREE CALL →

Or re-run this exact call — same tool, same arguments.

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Verification checks

Proof of observed execution

Receipt ID
9924c86b-9044-43b4-baa8-f4bfd5c72018
SHA-256 output hash
sha256:d3a7b2af003b13740406ff53cbb76808c2f2e3705c2e688af2aea52fc24a42d0
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.2
v0.2 receipt; call-context metadata was not recorded.

Bound upstream evidence

Status
captured
Evidence SHA-256
sha256:410760560f925013d8635ce297fd0bfcc8824b64202089a2bd3dfc217909d4db
Byte length
2329

Fetch exact evidence bytes

Neutral Nostr anchor

Event ID
d19e76d1ecf5c10b150a76531af0e615c692f3a2d1a2cd13238100129f95bfb7
Anchor status
partial
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.damus.io · wss://nos.lol · wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Signed envelope bytes:

{"anchored_at":"2026-09-19T21:10:20.754Z","evidence_byte_length":2329,"evidence_sha256":"sha256:410760560f925013d8635ce297fd0bfcc8824b64202089a2bd3dfc217909d4db","evidence_url":"https://zambo.dev/api/evidence/410760560f925013d8635ce297fd0bfcc8824b64202089a2bd3dfc217909d4db","output_sha256":"sha256:d3a7b2af003b13740406ff53cbb76808c2f2e3705c2e688af2aea52fc24a42d0","receipt_uuid":"9924c86b-9044-43b4-baa8-f4bfd5c72018","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

Open the verification endpoint — the server recomputes the SHA-256 from the stored bytes and answers verified:true. If it doesn't say verified, don't trust this page. See the Nostr anchor event on a public viewer — the fingerprint is timestamped outside Zambo too.

Embed this receipt

Markdown

[![Verified Zambo receipt](https://zambo.dev/api/receipt/9924c86b-9044-43b4-baa8-f4bfd5c72018/badge.svg)](https://zambo.dev/run/9924c86b-9044-43b4-baa8-f4bfd5c72018)

HTML

<a href="https://zambo.dev/run/9924c86b-9044-43b4-baa8-f4bfd5c72018"><img src="https://zambo.dev/api/receipt/9924c86b-9044-43b4-baa8-f4bfd5c72018/badge.svg" alt="Verified Zambo receipt"></a>

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