GPT55 x402 Gateway

This repository contains a small, read-only MCP directory wrapper and a quote-first buyer client for the public GPT55 x402 service.

Canonical service entry:

• Service hub: https://gpt55.558686.xyz/x402/service

• Machine-readable catalog: https://gpt55.558686.xyz/x402/service.json

• Main model route: POST https://gpt55.558686.xyz/v1/chat/completions/standard

• MCP endpoint: https://gpt55.558686.xyz/mcp

Safety Model

The buyer client is quote-only by default. Its local policy pins the exact URL, HTTP method, amount, Base network, canonical Base USDC contract, and merchant address for the main model route. Remote catalogs are discovery metadata only. The client does not sign or pay unless the operator explicitly sets PAY_REAL_X402=1 and provides a wallet key in the operator-controlled process.

Never paste a private key, seed phrase, payment header, API key, or exchange credential into a website, chat, issue, log, or remote service.

Related MCP server: Blocksize Market Data

Quote-Only Check

git clone https://github.com/wangletiand/gpt55-x402-gateway.git
cd gpt55-x402-gateway
npm install
ROUTE_ID=main-model-standard MAX_USDC=0.003 npm run first-payment:quote

The command remains quote-only unless real payment is explicitly enabled. Generated evidence files and .env files are ignored by Git.

Local MCP Wrapper

npm install
npm test
npm start

The wrapper exposes one local read-only directory tool. It does not proxy MCP tool calls, custody funds, store wallet keys, or execute payments.

Repository Scope

This public repository intentionally contains only the maintained runtime wrapper, buyer safety client, tests, and concise documentation. Operational logs, payment evidence, wallet files, credentials, internal channel ledgers, and bulk submission automation are excluded.

Support and Security

For security reports, follow SECURITY.md. Do not include secrets or wallet material in a report.

Licensed under the MIT License.