GPT55 Model Gateway
GPT-5.6 Luna Standard chat is $0.00293 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 $0.00293 and model-specific prices at /pricing.json. GPT-5.6 Luna Standard is $0.00293 per request, restoring the historically converting public Standard entry quote while preserving the documented cost floor; 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.
AgentCard object — a capabilities object, a declared protocolVersion, and a well-formed skills array.
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://gpt55.558686.xyz/a2a
· transport JSONRPC
non-standard supportedInterfaces
GPT-5.6 Luna Standard Chat Completions gpt55-chat-completions
Generate responses from the OpenAI-compatible GPT-5.6 Luna Standard endpoint. Price: $0.00293 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-helpTranslate gpt55-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: $0.00293 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-toolsummarizesummarizationtldrtranslatetranslationx402 Buyer Shortlist gpt55-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-toolsummarizesummarizationtldrtranslatetranslationWallet Signing Safety Pack gpt55-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-toolsummarizesummarizationtldrtranslatetranslationx402 MCP Integration Kit gpt55-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-toolsummarizesummarizationtldrtranslatetranslation2026-09-19 from https://gpt55.558686.xyz/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.