# Agent First-Purchase Merchant Trust Gate

> Agent First-Purchase Merchant Trust Gate 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 2026-09-13).

Returns a deterministic decision procedure (brief) an agent runs before making its first x402 payment to an unfamiliar merchant, covering contract completeness, disclosure honesty, refund/dispute path, identity anchor, kill criteria, and a single pass/fail verdict.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-first-purchase-merchant-trust-gate-determi
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-first-purchase-merchant-trust-gate-3fd1ca09
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C49-MOo9Tit17f2trMMqo

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 agent-first-purchase-merchant-trust-gate-3fd1ca09
```

Example prompt: Before I authorize the first x402 payment to this new merchant I've never paid before, run the merchant trust gate decision procedure and tell me whether it passes or fails — check contract completeness, disclosure honesty, refund path, and identity anchor.

## When to prefer this

Use this endpoint when an autonomous agent is about to make its very first x402 payment to a merchant it has never transacted with before and needs a structured, blunt pass/fail gate — not a marketing summary. Prefer this over generic web searches or manual review when you need a deterministic, agent-optimized checklist covering contract completeness, disclosure, refund paths, and identity anchoring in a single low-cost call.

## Known failure modes

- Payment required but not provided — returns 402 with payment details
- Invalid query parameter values (e.g. bad meta enum) — schema validation error
- Service temporarily unavailable on the remote host — network or 5xx error
- No merchant context provided — generic procedure returned without merchant-specific evaluation

## How this service works

Paid agent-facing brief on agent first-purchase merchant trust gate: deterministic procedure an agent runs before its first-ever x402 payment to an unfamiliar merchant, verifying contract completeness, disclosure honesty, refund/dispute path, identity anchor, with kill criteria and a single verdict. Blunt decision procedure, not marketing.

## Output

A structured brief containing the deterministic decision procedure prose for agents, a pass/fail verdict (ok boolean), kill criteria, the topic evaluated, generation source (llm/reasoning/deterministic), and an ISO-8601 timestamp of when the brief was generated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent first-purchase merchant trust gate: deterministic procedure an a paid response",
     "$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/agent-first-purchase-merchant-trust-gate-3fd1ca09/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)