# x402 Signed Receipt Delivery Confidence Scorer

> x402 Signed Receipt Delivery Confidence Scorer is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Scores the confidence that a signed x402 payment receipt correctly proves delivery of a paid resource, by checking offer, receipt, and delivery proof facts against optional reference facts.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-signed-receipt-delivery-confidence-scorer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-signed-receipt-delivery-confidence-scorer-bbad6b10
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_17c56ihVLMoYz8th3KbXX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-signed-receipt-delivery-confidence-scorer-bbad6b10 -d '<json body>'
```

Example prompt: Score the delivery confidence for this x402 transaction: the offer is present, the signed receipt is present, there's a delivery proof, the resource is 'premium-analytics-report', the amount is 0.01 USDC on Base, signed at 2025-01-15T10:00:00Z, valid until 2025-01-15T10:05:00Z, and the response hash is sha256:a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2.

## When to prefer this

Use this endpoint when you need a programmatic, scored assessment of whether an x402 micropayment receipt genuinely proves resource delivery — particularly when running automated agent pipelines that pay for API responses and need to verify they received what they paid for. Prefer this over manual inspection when you have structured receipt facts and optionally reference facts to compare against, and need a confidence score rather than a simple boolean check.

## Known failure modes

- Missing required facts fields (offer_present, receipt_present, delivery_proof_present, resource_label, amount, currency) cause validation errors
- Invalid response_hash format (not matching sha256:[64 hex chars]) causes schema rejection
- mode field missing or not set to 'check' causes request rejection
- Mismatched facts vs reference_facts may yield low confidence score rather than an error
- Payment failure (x402) returns 402 status requiring USDC payment before scoring
- Network or currency strings exceeding 500 characters cause input rejection

## How this service works

Choose Blockchain Money Map for human-readable public blockchain reports, x402-paid agent API services, agent workflow packs, custom agent builds, or an Agent Radar pilot preview.

## Output

A JSON response containing a delivery confidence score and assessment indicating how reliably the provided offer, receipt, and delivery proof facts demonstrate that a paid x402 resource was successfully delivered, potentially with comparison against reference facts.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "check"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "offer_present",
    "receipt_present",
    "delivery_proof_present",
    "resource_label",
    "amount",
    "currency"
   ],
   "properties": {
    "amount": {
     "type": "number"
    },
    "network": {
     "type": "string",
     "maxLength": 500
    },
    "currency": {
     "type": "string",
     "maxLength": 500
    },
    "signed_at": {
     "type": "string",
     "maxLength": 500
    },
    "valid_until": {
     "type": "string",
     "maxLength": 500
    },
    "offer_present": {
     "type": "boolean"
    },
    "response_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "resource_label": {
     "type": "string",
     "maxLength": 500
    },
    "receipt_present": {
     "type": "boolean"
    },
    "delivery_proof_present": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "offer_present",
    "receipt_present",
    "delivery_proof_present",
    "resource_label",
    "amount",
    "currency"
   ],
   "properties": {
    "amount": {
     "type": "number"
    },
    "network": {
     "type": "string",
     "maxLength": 500
    },
    "currency": {
     "type": "string",
     "maxLength": 500
    },
    "signed_at": {
     "type": "string",
     "maxLength": 500
    },
    "valid_until": {
     "type": "string",
     "maxLength": 500
    },
    "offer_present": {
     "type": "boolean"
    },
    "response_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "resource_label": {
     "type": "string",
     "maxLength": 500
    },
    "receipt_present": {
     "type": "boolean"
    },
    "delivery_proof_present": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-signed-receipt-delivery-confidence-scorer-bbad6b10/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)