{"uid":"cap_oomaaOmNEwPcjjx_rP3pl","slug":"gpt-5-5-long-output-chat-gateway-x402-usdc-4ed550eb","name":"GPT-5.5 Long-Output Chat Gateway (x402 USDC)","description":"OpenAI-compatible GPT-5.5 long-output paid chat over x402 Base USDC. Directory-friendly GET endpoint for longer agent answers, summaries, code explanations, and GPT-5.5 chat completions. 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, while this gateway advertises a $0.110876 compact GPT-5.5 entry request, $0.110876 long-output GPT-5.5 requests, and $0.523889 true max-output GPT-5.5 requests. Pay up to $0.110876 per request with x402 USDC on Base. Exact fixed-price payment and upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Public paid calls are limited to 700000 input characters and 4096 output tokens.","url":"https://gpt55.558686.xyz/v1/paid/chat-long","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"q":{"type":"string"},"prompt":{"type":"string"},"system":{"type":"string"},"message":{"type":"string"},"max_tokens":{"type":"integer","maximum":4096,"minimum":1}},"additionalProperties":true}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["id","object","model","choices"],"properties":{"id":{"type":"string"},"model":{"type":"string"},"usage":{"type":"object"},"object":{"type":"string"},"choices":{"type":"array"}},"additionalProperties":true}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.110876","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.110876/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.110876","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.110876","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gcRhp0V6Otb62Pa1_i2kl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.110876","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides GPT-5.5 chat completions optimized for long outputs via a GET endpoint, paid with x402 USDC on Base at $0.002134 per call","exampleAgentPrompt":"Give me a detailed GPT-5.5 explanation of how transformer attention mechanisms work, up to 4096 tokens, paid via x402 USDC on Base — I need a thorough answer, not a short summary.","exampleUseCases":[{"title":"Summarize long document with GPT-5.5","prompt":"I have a lengthy research paper on climate change policy — can you use GPT-5.5 to summarize it in full detail, paid via x402 USDC on Base? I want a thorough summary, not just a few bullet points."},{"title":"Generate detailed code explanation","prompt":"Can you run a GPT-5.5 long-output request to explain this 500-line Python data pipeline I've got, paid with USDC on Base? I need a full walkthrough of what each section does, not a quick overview."},{"title":"Extended AI answer for complex question","prompt":"Use GPT-5.5 to give me a comprehensive breakdown of the pros and cons of different distributed database architectures — up to 4096 tokens — with x402 USDC micropayment on Base. I need real depth here, not a surface-level answer."}],"resultDescription":"An OpenAI-compatible JSON response containing an id, object type, model name, choices array with the generated text (up to 4096 tokens), and usage statistics reflecting actual token consumption.","failureModes":["Insufficient USDC balance for x402 payment returns 402 Payment Required","Input exceeding 700000 characters rejected","max_tokens above 4096 rejected with validation error","Missing required prompt/q/message parameter returns error","Network or gateway timeout on long generations","Invalid x402 payment header format causes authentication failure"],"whenToPreferThis":"Choose this endpoint when you need longer GPT-5.5 outputs (up to 4096 tokens) at a slightly higher per-call price than the compact tier ($0.002134 vs $0.0001), and you want token-metered or fixed-price x402 USDC payment on Base. Ideal for summaries, code explanations, and detailed answers that exceed compact-tier length limits.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:55:52.050Z","isFirstParty":false}