{"uid":"cap_rw6DYrNHfObGEAdAou24z","slug":"pennyrail-gpt-4o-mini-chat-008144b4","name":"PennyRail GPT-4o Mini Chat","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/premium/ai.chat-mini--gpt-4o-mini-chat","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hqWUCWD6S486zTCNn0yRI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Sends a chat message to GPT-4o Mini via a paid micropayment API proxy and returns the model's response","exampleAgentPrompt":"Send my question 'What are the top 3 causes of the French Revolution?' to the GPT-4o Mini chat model and give me a concise answer.","exampleUseCases":[{"title":"Quick factual Q&A via mini model","prompt":"Ask GPT-4o Mini: 'Explain the difference between RAM and ROM in simple terms' and return the answer to me."},{"title":"Agent sub-task text generation","prompt":"I need a short product description for my new wireless headphones — use the GPT-4o Mini chat endpoint to draft one for me."},{"title":"Automated customer support reply draft","prompt":"Draft a polite email response to this customer complaint using GPT-4o Mini: 'My order arrived damaged and I want a refund.'"}],"resultDescription":"Returns a JSON object containing the GPT-4o Mini model's text response to the provided input, structured as an open-ended object. The exact fields depend on the model output but typically include the generated message or completion.","failureModes":["Payment failure: insufficient USDC balance causes 402 rejection before the model is called","Invalid input schema: missing or malformed 'input' object returns a 400 or validation error","Model timeout: GPT-4o Mini upstream latency occasionally causes gateway timeouts","Opaque response schema: additionalProperties:true means response shape may vary and agents must handle unexpected fields","Rate limiting: high-frequency callers may be throttled by the proxy"],"whenToPreferThis":"Choose this endpoint when you need lightweight, cost-efficient chat completions via GPT-4o Mini at $0.02 per call without managing your own OpenAI API keys, and when your agent or application supports x402 micropayment flows. It is ideal for agentic pipelines that need pay-per-use text generation without subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:11:15.106Z","isFirstParty":false}