{"uid":"cap_aWNOMt0g1r5UJ7Gi-Z5F6","slug":"redbtc-gpt-5-5-fixed-price-chat-84909c27","name":"RedBTC GPT-5.5 Fixed-Price Chat","description":"Low-cost RedBTC strong chat route. Fixed gpt-5.5, no API key, USDC per call, hard capped for safe autonomous use.","url":"https://redbtco.com/x402/redbtc/chat/5.5?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"model":{"type":"string","description":"Optional. RedBTC forces gpt-5.6-luna on this fixed-price route."},"messages":{"type":"array","items":{"type":"object","required":["role","content"],"properties":{"role":{"enum":["system","user","assistant","tool"],"type":"string"},"content":{"type":"string"}}},"minItems":1},"max_tokens":{"type":"integer","maximum":700,"minimum":1},"temperature":{"type":"number","maximum":2,"minimum":0}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1Q95MTTBVspqh9usVt1N4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides a fixed-model GPT-5.5 chat completion endpoint billed at $0.002 USDC per call with no API key required, capped at 700 tokens output for safe autonomous agent use.","exampleAgentPrompt":"Ask RedBTC's GPT-5.5 chat route to explain the differences between supervised and unsupervised learning in plain English, keeping the answer under 400 tokens.","exampleUseCases":[{"title":"Autonomous agent decision-making assistant","prompt":"I need you to use the RedBTC GPT-5.5 chat to evaluate the following two options for my project and give me a concise recommendation in under 300 tokens — no API key needed, just pay per call."},{"title":"Low-cost content drafting in pipeline","prompt":"Draft a short product description for a noise-cancelling headphone called AuraSound Pro using the RedBTC GPT-5.5 model, keeping the output under 200 tokens, with temperature set to 0.7."},{"title":"Agent safety-gated Q&A with token cap","prompt":"Send this customer question to the RedBTC GPT-5.5 endpoint: 'What is the return policy for electronics?' — cap the reply at 150 tokens so it stays short and safe for the automated support flow."}],"resultDescription":"Returns an OpenAI-compatible chat completion object containing the assistant's generated text, capped at a maximum of 700 output tokens. The model is always GPT-5.5 regardless of any model parameter passed. Each call deducts $0.002 USDC via x402 payment.","failureModes":["Insufficient USDC balance or failed x402 payment returns a 402 Payment Required error","Exceeding max_tokens limit of 700 returns a validation error","Empty or malformed messages array returns a 400 Bad Request","Upstream GPT-5.5 model unavailability may cause 503 or timeout errors","Passing model parameter with a different model name is silently overridden to gpt-5.5"],"whenToPreferThis":"Choose this endpoint when you need a strong GPT-5.5 model response with predictable per-call USDC billing and no OpenAI API key management, especially in autonomous agent pipelines that require hard output token caps for safety. Prefer it over the sibling gpt-5.4-mini route when output quality matters more than cost minimization. Use it over direct OpenAI access when you want x402 micropayment billing without credential management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T02:28:20.236Z","isFirstParty":false,"canonicalSlug":"redbtc-gpt-5-5-fixed-price-chat-84909c27"}