# Delegated Pickup Endorsement Verification Procedure (K-2SO x402)

> Delegated Pickup Endorsement Verification Procedure (K-2SO x402) is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns a paid, LLM-generated decision procedure brief for an AI agent verifying delegated pickup endorsements, covering step-by-step logic and compliance considerations.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/delegated-pickup-endorsement-verification-proced?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delegated-pickup-endorsement-verification-procedure-k-2so-x402-b1a7a438
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8bTRMIOriUZXvBtwc6Mqd

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 delegated-pickup-endorsement-verification-procedure-k-2so-x402-b1a7a438
```

Example prompt: Give me the decision procedure an autonomous agent should follow to verify a delegated pickup endorsement — I need the full step-by-step logic including any compliance checks.

## When to prefer this

Choose this endpoint when an AI agent needs a structured, prose-format decision procedure specifically for verifying delegated pickup endorsements and you want a ready-to-use, LLM-generated brief rather than writing the logic yourself. It is ideal for autonomous agent pipelines that require on-demand compliance guidance at micropayment scale ($0.002 USDC), especially when the agent operates on Base with USDC and supports the x402 payment protocol.

## Known failure modes

- HTTP 402 returned if payment has not been settled — agent must pay exact USDC amount and retry with PAYMENT-SIGNATURE header
- Malformed or missing payment signature results in rejection
- Invalid queryParam values (e.g. unsupported meta value) may cause schema validation errors
- Service may return ok:false in the result object if the handler fails internally
- Network or upstream LLM errors may cause delayed or empty brief responses

## How this service works

Deterministic gate for an agent that paid for goods via machine payment and must delegate IRL pickup to a courier or third party. Ordered checks: endorsement chain from the paying wallet, signature validity with nonce, scope binding to specific items and location, endorsement expiry inside the receipt freshness window, collector identity binding, one-time consumption so payer and collector cannot both redeem, and collector default risk holding settlement without delivery confirmation. Outputs

## Output

A JSON object containing a plain-prose decision procedure brief (120+ words) tailored to delegated pickup endorsement verification, including the model used to generate it, the topic, a generation timestamp, the generation source (llm/reasoning/deterministic), and payment confirmation metadata.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "result": {
   "ok": true,
   "brief": "plain prose decision procedure (120+ words)",
   "model": "deepseek/deepseek-v4-flash-0731",
   "topic": "string topic",
   "service": "delegated-pickup-endorsement-verification-proced",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "delegated-pickup-endorsement-verification-proced",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delegated-pickup-endorsement-verification-procedure-k-2so-x402-b1a7a438/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)