{"uid":"cap_NcIo8khV5JTGxy0uwGTvz","slug":"singit-ask-openai-responses-api-59ec209f","name":"SingIt Ask – OpenAI Responses API","description":"SingIt Ask: OpenAI's Responses API, any model listed at GET /v1/models (GPT, Claude, Gemini, DeepSeek and more). Call it when an agent needs an answer in OpenAI's Responses format with no API key or account.","url":"https://ask.singitai.app/v1/responses?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"oneOf":[{"type":"string","minLength":1},{"type":"array","minItems":1}],"description":"The question: text, or a non-empty list of input items (OpenAI Responses format)."},"model":{"type":"string","examples":["claude-sonnet-5.5","gpt-5.5","gemini-3.1-pro"],"maxLength":120,"description":"Any model id from GET /v1/models; Anthropic's dashed names (claude-sonnet-5-5) work too."},"tools":{"type":"array","description":"Optional tool definitions."},"stream":{"enum":[false],"type":"boolean","description":"Streaming is not offered: an answer is paid for whole."},"instructions":{"type":"string","description":"Optional system instructions."},"max_output_tokens":{"type":"integer","default":4096,"maximum":32000,"minimum":1,"description":"The longest answer, in tokens. The payment ceiling grows with it; the charge follows what was used."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0015","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KsTLt9W0fnfkLnXMi4MP8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calls OpenAI's Responses API format (supporting GPT, Claude, Gemini, DeepSeek and more) with per-answer metered payment via x402, no API key required","exampleAgentPrompt":"Using the OpenAI Responses API format on SingIt, send this prompt to gpt-4o: 'Summarize the key differences between transformer and mamba architectures in three bullet points' — charge the token cost to my USDC wallet, no account needed.","exampleUseCases":[{"title":"No-account LLM prompt for automation","prompt":"Send this system prompt and user message to Claude 3.5 Sonnet using the OpenAI Responses format on SingIt — I don't want to manage API keys, just charge my USDC balance per answer: system='You are a concise JSON extractor', user='Extract name, date, and amount from: Invoice #1042 for Alice, 2024-06-01, $320.00'"},{"title":"Multi-model comparison without subscriptions","prompt":"Query both gpt-4o-mini and gemini-1.5-flash with the same prompt through SingIt's Responses API — 'What are three creative names for a plant-based burger brand?' — and show me both answers, paying only when each responds."},{"title":"AI coding assistant call from a script","prompt":"Through SingIt's OpenAI Responses API, ask DeepSeek-Coder: 'Write a Python function that validates an email address using a regex and returns True or False' — bill it as a micropayment so my script doesn't need a stored API key."}],"resultDescription":"Returns the model's completion in OpenAI Responses API format, including the generated text content and token usage metadata. Charges are applied only when a valid answer is returned: actual token cost plus 30% markup plus a settlement fee (0.001 USDC on Base, 0.002 on Solana), up to a model/size-specific ceiling.","failureModes":["Insufficient USDC balance — payment rejected before inference runs","Invalid or unsupported model name — model not found in /v1/models list","Malformed request body — missing required 'input' field or wrong bodyType enum","Model provider outage — upstream LLM unavailable, no charge applied","Request too large — exceeds ceiling for the selected model","Network timeout — inference takes too long, no answer returned so no charge"],"whenToPreferThis":"Prefer this endpoint when you need to call LLMs via the OpenAI Responses API format without managing API keys or subscriptions, especially in agent pipelines that want pay-per-successful-answer semantics with USDC micropayments. It is ideal when you want to access GPT, Claude, Gemini, or DeepSeek through a single unified interface with crypto-native billing. Choose it over direct provider APIs when you want no upfront account setup, only-on-success charging, and support for multiple model families from one endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T12:34:07.161Z","isFirstParty":false,"canonicalSlug":"singit-ask-openai-responses-api-59ec209f"}