{"uid":"cap_HifDuHYnYM_oDTx-o3TTm","slug":"gpt-5-4-mini-chat-completions-via-get-gpt55-558686-xyz-0d48c13a","name":"GPT-5.4-Mini Chat Completions via GET (gpt55.558686.xyz)","description":"GET quote and query-parameter variant for Generate gpt-5.4-mini chat completions. GPT-5.4 Mini chat for mainstream short answers, routing decisions, extraction helpers, and buyer trials. Model tier: gpt-5.4-mini; upstream model: gpt-5.4-mini. Pay up to $0.00293 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Public paid calls are limited to 24000 input characters. Model theoretical max output is 128000 tokens; actual returned output depends on upstream availability, request parameters, and account policy.","url":"https://gpt55.558686.xyz/v1/chat/completions/gpt-5.4-mini","method":"GET","headers":{},"bodySchema":{"type":"object","$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"},"input":{"type":"string"},"model":{"enum":["gpt-5.4-mini","gpt-5.5","gpt-5.3-codex","gpt-5.4"],"type":"string"},"prompt":{"type":"string"},"system":{"type":"string"},"message":{"type":"string"},"max_tokens":{"type":"integer","maximum":128000,"minimum":1},"system_prompt":{"type":"string"},"max_output_tokens":{"type":"integer","maximum":128000,"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":"0.00293","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":"$0.00293/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.00293","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.00293","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1U-C8IsEalGXHFdgvA1o7","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.00293","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates GPT-5.4-mini chat completions via a GET request with query parameters, paid per-request via x402 USDC on Base or Solana.","exampleAgentPrompt":"Ask GPT-5.4-mini to extract the company name and founding year from this text: 'Acme Corp was founded in 1987 and specializes in industrial widgets.' — keep the answer short, max 100 tokens.","exampleUseCases":null,"resultDescription":"Returns an OpenAI-compatible JSON object with an id, object type, model name, choices array containing the generated message content, and a usage object with token counts. Actual output length depends on upstream availability and the max_tokens parameter.","failureModes":["Input text exceeds 24000 character limit — request rejected","Upstream GPT-5.4-mini unavailable — service returns error","x402 payment not submitted or insufficient — 402 Payment Required response","max_tokens value out of range (must be 1–128000) — validation error","Missing required 'input' query parameter — bad request error","USDC on Base transaction fails or times out — payment error"],"whenToPreferThis":"Choose this endpoint when you need lightweight, low-cost GPT-5.4-mini completions accessible via a simple GET request with query parameters — ideal for routing decisions, short extractions, buyer trials, or agent pipelines that prefer GET-based calls with x402 USDC micropayments on Base or Solana instead of a traditional API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:45:17.622Z","isFirstParty":false}