# K-2SO Agent Payment Claim Authorization Attestation Decision Procedure

> K-2SO Agent Payment Claim Authorization Attestation Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-20).

Returns a plain-prose decision procedure for verifying whether an autonomous agent is authorized to claim or attest a payment on behalf of a spender in x402 flows

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/agent-payment-claim-authorization-attestation-ve?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/k-2so-agent-payment-claim-authorization-attestation-decision-procedure-4f96e2ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CgBvduR2GRRV9FipuIiRx

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 k-2so-agent-payment-claim-authorization-attestation-decision-procedure-4f96e2ad
```

Example prompt: Give me the decision procedure for verifying that a spender is authorized to claim and attest a payment — I need plain-prose guidance my agent can follow when evaluating authorization in an x402 USDC flow on Base.

## When to prefer this

Choose this endpoint when an autonomous agent needs authoritative, prose-formatted policy guidance on whether to approve or attest a payment claim in an x402 USDC flow — particularly on Base. Prefer it over generic LLM prompting when you want a structured, versioned decision procedure with a known generation source and timestamp, suitable for embedding directly in agent logic or compliance documentation.

## Known failure modes

- HTTP 402 returned if payment has not been settled — must send exact USDC amount and retry with PAYMENT-SIGNATURE header
- Invalid or missing 'method' enum value causes schema validation failure
- Topic override that is too vague may result in a generic procedure rather than a targeted one
- Deterministic generation source may return cached content rather than freshly reasoned output
- Network or agent uptime issues on wrong.systems may cause transient failures

## How this service works

Paid agent-facing brief on agent payment claim authorization attestation: verify spender authorization (policy, delegation, budget cap) separately from settlement proof before honoring a received x402 payment claim · Build a decision procedure or schema for: agent payment claim authorization attestation: verify spender authorization (policy, delegation, budget cap) separately from settlement proof before honoring a received-0. Blunt decision procedure, not marketing.

## Output

A JSON object containing a plain-prose decision procedure (120+ words) under the 'brief' and 'procedure' fields, along with metadata: the service slug, the generating model (e.g. deepseek), a generatedAt ISO-8601 timestamp, and a generationSource enum (llm, reasoning, or deterministic). The outer envelope confirms payment status (ok, paid) and the provider name K-2SO.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent payment claim authorization attestation: verify spender authoriz paid response",
     "$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/k-2so-agent-payment-claim-authorization-attestation-decision-procedure-4f96e2ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)