GPT55 Model Gateway
Remote MCP gateway for GPT-5.6 Luna, Soul, Terra, and x402-paid agent tools with no API key.
Open source Repository Open in the app JSON README (API)
About
Remote MCP gateway for GPT-5.6 Luna, Soul, Terra, and x402-paid agent tools with no API key.
Details
- Kind
- MCP servers
- Topic
- Finance & crypto
- Publisher
- xyz.558686.gpt55
- Origin
- official
- Category
- ferramentas
- Transport
- http
- Version
- 2026.8.5
- Last push
- 2026-08-24T17:36:50Z
- Repository state
- ativo
- Language
- JavaScript
- License
- MIT
- Added
- 2026-08-29 04:01:56
- Updated
- 2026-08-29 04:01:56
- Origin id
xyz.558686.gpt55/token-gateway
README
# x402 GPT API | GPT-5.6 Luna Base USDC Gateway GPT55 x402 Gateway is the canonical buyer-owned Base USDC entry for this repository. GPT55 is an **x402 GPT API** gateway: it provides an OpenAI-compatible **GPT-5.6 Luna Standard** result for **$0.00293 USDC on Base**. This is a compatible gateway, not an OpenAI-operated product. Buyers can pay one request from a browser wallet without handing over a private key, or use the quote-first agent fallback client when a wallet UI is unavailable. The focused search topic is **x402 GPT API / GPT API with USDC on Base**: one `POST` request, one live quote, and one response. The canonical buyer path and complete integration guide are below. The EVM Wallet Balance Snapshot remains available as a separate utility alternative; it is not the model product. Canonical service entry: - Service hub: <https://gpt55.558686.xyz/x402/service> - Machine-readable catalog: <https://gpt55.558686.xyz/x402/service.json> - x402 GPT API guide: <https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api> - Static buyer guide: <https://wangletiand.github.io/gpt55-x402-gateway/x402-gpt-api-guide.html> - Machine-readable summary: <https://wangletiand.github.io/gpt55-x402-gateway/llms.txt> - Main model route: `POST https://gpt55.558686.xyz/v1/chat/completions/standard` - Standard quote: `$0.00293` (`2930` atomic USDC units) on Base `eip155:8453` - Browser checkout: <https://gpt55.558686.xyz/x402/service?checkout=standard-chat> - Wallet alternative: <https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance> - Key Pack upgrade: <https://x402-key.558686.xyz/x402/checkout> - MCP endpoint: <https://gpt55.558686.xyz/mcp> For the exact browser-wallet, Base MCP, agent fallback, receipt, and directory verification sequence, see [docs/demand-first-checkout.md](docs/demand-first-checkout.md). ## Lowest-Friction First Payment When validating a buyer-owned wallet or x402 client, start with the deterministic translate settlement canary before buying a model call or a larger pack: - Buyer guide: <https://gpt55.558686.xyz/x402/translate-first-purchase> - Paid route: `POST https://gpt55.558686.xyz/v1/tools/translate` - Quote-only command: `ROUTE_ID=translate-canary MAX_USDC=0.00293 node first-payment-client.mjs` The client is quote-only by default. It verifies the live amount, Base network, USDC asset, merchant address, and same-request retry contract before an operator explicitly opts into payment. A successful canary is the smallest real payment test; Standard chat is the next step for a useful GPT-5.6 Luna response. ## Agent Fallback The buyer client is quote-only by default. Its local policies pin the exact URL, HTTP method, amount, Base network, canonical Base USDC contract, and merchant address for both Wallet and Standard. 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. ## Quote-Only Check ```bash git clone https://github.com/wangletiand/gpt55-x402-gateway.git cd gpt55-x402-gateway npm install ROUTE_ID=standard MAX_USDC=0.00293 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. The live quote is authoritative immediately before any payment. For an OpenAI-compatible request, send the same JSON body to `/v1/chat/completions/standard` after the x402 client returns a valid paid retry. The public service hub includes the browser-wallet flow and a link to the agent fallback client. ## Local MCP Wrapper ```bash 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](SECURITY.md). Do not include secrets or wallet material in a report. Licensed under the MIT License.