# x402 Payment Dispute Resolution Decision Procedure

> x402 Payment Dispute Resolution Decision Procedure 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 2026-10-12).

Returns a structured decision procedure for agents navigating a contested x402 payment, covering evidence freezing, dispute classification, and a cost-gated recover-first escalation ladder.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-facing-x402-payment-dispute-resolution-pro?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-payment-dispute-resolution-decision-procedure-7ddd8df1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t2WvtIGjisq50Xa_Pbsa4

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-payment-dispute-resolution-decision-procedure-7ddd8df1
```

Example prompt: I paid an x402 merchant 0.05 USDC for a data payload but they went silent and never delivered — walk me through the full dispute resolution procedure, starting with how to freeze the evidence and then what recovery steps to try before escalating.

## When to prefer this

Choose this endpoint when an agent is actively involved in an x402 payment dispute — either as buyer or merchant — and needs a structured, ordered decision procedure rather than general payment advice. It is specifically optimized for x402 protocol disputes with evidence-freezing, classify-then-recover logic, and cost-gated escalation, making it more actionable than a generic dispute FAQ or a human-facing legal resource.

## Known failure modes

- Missing required input fields returns a validation error
- Payment not included results in a 402 response requiring USDC payment before access
- Invalid topic override may return a generic rather than scenario-specific procedure
- Downstream LLM unavailability may cause generation failure or degraded response
- Rate limiting or network issues on the ascii.dev host may cause timeouts

## How this service works

Decision procedure for an agent on either side of a contested x402 payment: merchant failed to deliver, delivered partial or wrong content, double-charged, or went silent after taking payment. Ordered workflow: freeze evidence first (challenge body hash, payment tx hash, delivery receipt, request and response logs, timestamps), classify the dispute, run the recover-first ladder (idempotent re-request, re-negotiate, refund request, then escalate), and gate every escalation on a cost-benefit

## Output

A prose decision procedure brief tailored to the dispute scenario, including ordered workflow steps (evidence freezing, dispute classification, recover-first ladder, cost-benefit escalation gating), plus metadata: service slug, generation source (llm/reasoning/deterministic), model used, and ISO-8601 generation timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "x402 Payment Dispute Resolution Decision Procedure paid response",
     "$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": {
         "type": "string"
   
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-payment-dispute-resolution-decision-procedure-7ddd8df1/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)