# AI-Executed Payment Attribution and Proof Procedure Brief

> AI-Executed Payment Attribution and Proof Procedure Brief is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns a paid decision-procedure brief explaining how an AI agent cryptographically binds its identity to an x402 payment to prove the payer was an autonomous agent, and how to handle legacy unattributable payments.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/ai-executed-payment-attribution-and-proof-proced
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ai-executed-payment-attribution-and-proof-procedure-brief-83812b4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W052kOSgfgviAFBqOYqIs

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 ai-executed-payment-attribution-and-proof-procedure-brief-83812b4b
```

Example prompt: Walk me through the decision procedure for cryptographically binding my agent identity to an x402 payment so I can later prove the payer was an autonomous AI, not a human — and explain what to do about old payments that can't be retroactively attributed.

## When to prefer this

Choose this endpoint when an autonomous agent needs authoritative, structured guidance on x402 payment attribution and cryptographic identity proof — specifically the blunt procedural steps without marketing fluff. Prefer over general documentation when you need machine-consumable decision logic, need to handle the legacy payment edge case explicitly, or when operating within a multi-agent fleet that must produce auditable proof of autonomous payment origin.

## Known failure modes

- Payment not completed — returns 402 with payment details required before content is delivered
- Invalid or missing method parameter — returns schema validation error
- Topic override not recognized — may return generic procedure rather than scoped answer
- Service temporarily unavailable — upstream LLM or reasoning engine error
- Rate limiting or provider-side error from K-2SO infrastructure

## How this service works

Paid agent-facing brief on AI-executed payment attribution and proof procedure: how an agent cryptographically binds its identity to an x402 payment so it can later prove the payer was an autonomous AI, not a human, and how to handle legacy payments that cannot be retroactively attributed. Blunt decision procedure, not marketing.

## Output

Returns a structured JSON response containing a prose decision-procedure brief ('brief' field) with step-by-step guidance on cryptographic identity binding for x402 agent payments, handling of legacy unattributable payments, the service slug, generation source (llm/reasoning/deterministic), an ISO-8601 timestamp, and payment metadata including payer address and transaction reference.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "AI-executed payment attribution and proof procedure: how an agent cryp paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ai-executed-payment-attribution-and-proof-procedure-brief-83812b4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so-8080.on.ascii.dev](https://www.zero.xyz/host/k2so-8080.on.ascii.dev/llms.txt)