GPT55 Model Gateway

GPT-5.6 Luna Standard chat is $0.019999 per request over x402 USDC on Base; current model-specific routes and prepaid call packs are also available. Market benchmark: the latest local x402.direct sample found AI-like listing prices with p25 around $0.01 and median around $0.03 per call; this gateway publishes GPT-5.6 Luna Standard at $0.019999 and model-specific prices at /pricing.json. GPT-5.6 Luna Standard is $0.019999 per request, the rounded six-decimal geometric mean of the previous public Standard and Luna quotes; model-specific routes retain their published Luna-relative price proportions. Service hub: https://gpt55.558686.xyz/x402/service and https://gpt55.558686.xyz/x402/service.json. Discovery assets: https://gpt55.558686.xyz/openapi.json, https://gpt55.558686.xyz/llms.txt, https://gpt55.558686.xyz/tools.json, https://gpt55.558686.xyz/apis.json, https://gpt55.558686.xyz/directory-submission.json. Agent and MCP metadata: https://gpt55.558686.xyz/.well-known/agent-card.json, https://gpt55.558686.xyz/.well-known/ai-catalog.json, https://gpt55.558686.xyz/.well-known/mcp/server-card.json, https://gpt55.558686.xyz/server.json. Integration hub: https://gpt55.558686.xyz/integrations and https://gpt55.558686.xyz/integrations.json. Best for agents that need one-call GPT-5.6 Luna Standard access without API-key onboarding or subscription setup. Model theoretical max output is 128000 tokens; actual returned output depends on upstream availability, request parameters, and account policy.

Skills

• GPT-5.6 Luna Standard Chat Completions
  Generate responses from the OpenAI-compatible GPT-5.6 Luna Standard endpoint. Price: $0.019999 USDC per request via x402 on Base. Use for summarize text, translate text, answer question, rewrite text, context QA, and short agent responses.
  aillmgpt-5.5chatopenai-compatiblex402base-usdcx402-chatopenai-compatible-chatpay-per-requestagent-toolsummarizesummarizationtldrtranslatetranslationrewriteeditinggrammarquestion-answeringqacontext-qatext-processingcode-reviewdebuggingjsonurl-metadataurl-texturl-linksx402-auditapi-auditbuyer-readinessopenapi-audithttp-statusredirect-checkweb-metadataweb-scrapinglink-extractioncrawlertext-extractiondata-extractionjson-validatevalidationhashbase64jwttimestampurl-parsequerystringregexslugifycase-convertuuidtext-statsline-diffstructured-outputmicrotaskrewritingcoding-help
• Translate
  Translate short text, messages, notes, and snippets to a requested target language for agent workflows, localization, bilingual support replies, and quick multilingual output. Standard quality tier uses gpt-5.6-luna; price is derived from official OpenAI relative token costs with a local margin and floor. Price: $0.019999 USDC per request via x402 on Base. Requested output limit: 64 tokens. Model: gpt-5.6-luna. Buyer search phrases: translate text, cheap translation, localization, bilingual support reply, multilingual agent output, x402 paid tool.
  aillmgpt-5.5chatopenai-compatiblex402base-usdcx402-chatopenai-compatible-chatpay-per-requestagent-toolsummarizesummarizationtldrtranslatetranslation
• x402 Buyer Shortlist
  Fetch x402 discovery documents, rank matching resources by advertised price, live-check the cheapest candidates with 402 quote inspection, and return a buyer-ready shortlist with verified amount, scheme, network, payTo, tags, and warnings. This deterministic endpoint does not call an upstream model. Price: $0.005 USDC per request via x402 on Base. No upstream model call. Buyer search phrases: x402 buyer shortlist, find payable APIs, rank x402 resources, buyer discovery, x402 paid tool, Base USDC.
  aillmgpt-5.5chatopenai-compatiblex402base-usdcx402-chatopenai-compatible-chatpay-per-requestagent-toolsummarizesummarizationtldrtranslatetranslation
• Wallet Signing Safety Pack
  Build a single wallet/agent pre-signing decision pack from optional EIP-712 typed data, EVM calldata, expected chain, known addresses, and x402 spend policy. Returns risk levels, risk flags, buyer decision, copy-paste checklist, and first-payment routing hints without using a private key, producing a signature, sending a transaction, broadcasting, or calling external RPC. Price: $0.018 USDC per request via x402 on Base. No upstream model call. Buyer search phrases: wallet signing safety pack, EIP-712 Permit2 safety pack, wallet pre signing decision, agent wallet risk policy, x402 wallet safety first purchase, approval and calldata risk pack.
  aillmgpt-5.5chatopenai-compatiblex402base-usdcx402-chatopenai-compatible-chatpay-per-requestagent-toolsummarizesummarizationtldrtranslatetranslation
• x402 MCP Integration Kit
  Generate a deterministic buyer integration package for an x402/MCP service: MCP remote server config, Claude Desktop-style config hints, curl discovery checks, x402 quote test commands, endpoint selection, spending caps, and verification checklist without calling an upstream model. Price: $0.006 USDC per request via x402 on Base. No upstream model call. Buyer search phrases: x402 MCP integration kit, MCP paid API config, Claude MCP x402 setup, x402 buyer onboarding, x402 client integration, agent paid API setup.
  aillmgpt-5.5chatopenai-compatiblex402base-usdcx402-chatopenai-compatible-chatpay-per-requestagent-toolsummarizesummarizationtldrtranslatetranslation

How to call

https://gpt55.558686.xyz/v1/chat/completions