# x402 Buyer Client Adapter Pack Generator

> x402 Buyer Client Adapter Pack Generator is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).

Generates a complete buyer client adapter pack (Node.js fetch client, Python/httpx outline, MCP tool wrapper, retry checklist, environment contract, receipt policy, and failure-stop conditions) for integrating with a paid x402 route.

## Facts

- Endpoint: POST https://gpt55.558686.xyz/v1/tools/x402-buyer-client-adapter-pack
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-buyer-client-adapter-pack-generator-46e95391
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MfZnsz65lkGZYkgpnYtZu

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-buyer-client-adapter-pack-generator-46e95391 -d '<json body>'
```

Example prompt: Generate me a full x402 buyer client adapter pack for a POST endpoint at https://api.example.com/v1/analyze, with a max spend of $0.05 per call and a $2.00 daily budget, expecting payment on Base in USDC to address 0xAbC123, using Node.js as my runtime, npm as my package manager, and requiring receipt evidence — include the MCP tool wrapper named 'analyze-tool'.

## When to prefer this

Choose this endpoint when you need to quickly scaffold a complete, opinionated buyer-side integration for an x402-protected route and want ready-to-use Node.js and Python code, an MCP tool wrapper, and operational policies (receipt capture, retry, failure-stop) all in one deterministic pass — rather than manually assembling client code and operational guidance from scratch.

## Known failure modes

- Input URL or paid_route missing or exceeds 2048 characters — validation error returned
- max_usdc_per_call exceeds $100 maximum — rejected with validation error
- buyer_runtime or package_manager value not recognized — may produce generic scaffolding
- expected_pay_to address malformed — adapter pack may contain placeholder values
- Input character limit of 700,000 exceeded — request rejected
- Daily budget below minimum of $0.0001 — rejected with validation error

## How this service works

Turn a target paid x402 route, buyer runtime, spend cap, expected payTo/network, request method, and receipt policy into a copy-paste buyer client adapter pack: official-style Node fetch client, Python/httpx outline, MCP tool wrapper, same-request retry checklist, environment contract, receipt capture policy, and failure-stop conditions. Built for the real quote-only drop-off where buyers can see a 402 quote but never produce X-PAYMENT. This deterministic endpoint does not call an upstream model, never asks for private keys, and never sends a payment itself. Pay up to $0.012 per request with x402 USDC on Base. Public paid calls are limited to 700000 input characters and 4096 output tokens.

## Output

A structured adapter pack including: an official-style Node.js fetch client, a Python/httpx outline, an MCP tool wrapper, a same-request retry checklist, an environment variable contract, a receipt capture policy, and explicit failure-stop conditions — all tailored to the specified x402 paid route parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 1
  },
  "method": {
   "enum": [
    "GET",
    "POST",
    "PUT",
    "PATCH",
    "DELETE"
   ],
   "type": "string"
  },
  "paid_route": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 1
  },
  "buyer_runtime": {
   "type": "string",
   "maxLength": 80
  },
  "mcp_tool_name": {
   "type": "string",
   "maxLength": 160
  },
  "expected_asset": {
   "type": "string",
   "maxLength": 80
  },
  "wallet_env_var": {
   "type": "string",
   "maxLength": 80
  },
  "expected_pay_to": {
   "type": "string",
   "maxLength": 120
  },
  "package_manager": {
   "type": "string",
   "maxLength": 40
  },
  "expected_network": {
   "type": "string",
   "maxLength": 80
  },
  "daily_budget_usdc": {
   "type": "number",
   "maximum": 10000,
   "minimum": 0.0001
  },
  "max_usdc_per_call": {
   "type": "number",
   "maximum": 100,
   "minimum": 0.0001
  },
  "request_body_example": {
   "type": [
    "object",
    "string",
    "null"
   ]
  },
  "require_receipt_evidence": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-buyer-client-adapter-pack-generator-46e95391/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)