{"uid":"cap_fmUitMaPthxGm7tcpZW0F","slug":"netintel-dev-gpt-5-1-pay-per-call-gateway-23bda79f","name":"netintel.dev GPT-5.1 Pay-Per-Call Gateway","description":"Call OpenAI's gpt-5.1 via a single pay-per-call x402 endpoint — no OpenAI account or API key needed, pay $0.15 per request in USDC. Standard OpenAI chat.completions request/response shape, capped input and output. Search terms: OpenAI, gpt-5.1, chat completion, LLM, no API key.","url":"https://netintel.dev/openai/gpt-5-1","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["messages"],"properties":{"messages":{"type":"array","items":{"type":"object","required":["role","content"],"properties":{"role":{"type":"string","description":"system, user, or assistant"},"content":{"type":"string","description":"Message text"}}},"description":"OpenAI chat messages: [{role:'system'|'user'|'assistant', content:string}]. Input capped ~96000 chars total."},"max_completion_tokens":{"type":"number","description":"Max output tokens. Optional — defaults to 4096, capped at 4096."}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"id":{"type":"string"},"model":{"type":"string"},"usage":{"type":"object","description":"prompt_tokens, completion_tokens, total_tokens"},"object":{"type":"string","description":"Always 'chat.completion'"},"choices":{"type":"array","description":"Assistant message + finish_reason."},"created":{"type":"number","description":"Unix timestamp (seconds)"}}}}}}},"responseSchema":{"type":"json","example":{"id":"chatcmpl-abc123","model":"gpt-5.1","usage":{"total_tokens":13,"prompt_tokens":11,"completion_tokens":2},"object":"chat.completion","choices":[{"index":0,"message":{"role":"assistant","content":"Hi!"},"finish_reason":"stop"}],"created":1735689600}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.15","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":"$0.15/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pp2mrEU5LvIwGrMicwfbv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.15","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Proxies OpenAI GPT-5.1 chat completions via a pay-per-call x402 endpoint at $0.15 USDC per request — no OpenAI account or API key required.","exampleAgentPrompt":"Ask GPT-5.1 to write a detailed explanation of how transformers work in machine learning — keep the response under 500 words and aimed at a software engineer who hasn't studied ML.","exampleUseCases":[{"title":"One-off LLM call without OpenAI account","prompt":"I need GPT-5.1 to summarize this legal document for me — I don't have an OpenAI account, just charge me per request: 'The parties agree that all intellectual property developed under this contract...' Keep it under 200 words."},{"title":"Agent reasoning step with frontier model","prompt":"Use GPT-5.1 to analyze these five customer support tickets and classify each as billing, technical, or general inquiry — here are the tickets: [ticket1]...[ticket5]."},{"title":"System-prompted creative writing task","prompt":"Have GPT-5.1 act as a professional copywriter and write three tagline options for my new productivity app called FocusForge — keep each tagline under 10 words and make them punchy."}],"resultDescription":"Returns a standard OpenAI chat.completion JSON object including an id, model name, created timestamp, choices array (with the assistant's message content and finish_reason), and a usage object detailing prompt_tokens, completion_tokens, and total_tokens. Output is capped at 4096 tokens.","failureModes":["Insufficient USDC balance or x402 payment failure — payment required error","Input exceeds ~96000 character cap — request rejected","max_completion_tokens set above 4096 — capped or rejected","Malformed messages array (missing role or content) — validation error","OpenAI upstream outage or rate limit — 502 or 503 error"],"whenToPreferThis":"Choose this endpoint when you need GPT-5.1 specifically (the latest OpenAI flagship model) on a pay-per-call basis without managing an OpenAI account, API keys, or subscription. Ideal for agents making occasional or unpredictable LLM calls, cost-sensitive pipelines that want per-call USDC billing, or sandboxed environments where storing API credentials is undesirable. Prefer GPT-4o or GPT-4.1 siblings on the same gateway if GPT-5.1 pricing or capability is more than needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:39:51.198Z","isFirstParty":false}