{"uid":"cap_GR5gK98WqRjlLpjq-50Sm","slug":"netintel-dev-gpt-5-5-pay-per-call-chat-completions-7e79a304","name":"netintel.dev GPT-5.5 Pay-Per-Call Chat Completions","description":"Call OpenAI's gpt-5.5 via a single pay-per-call x402 endpoint — no OpenAI account or API key needed, pay $0.65 per request in USDC. Standard OpenAI chat.completions request/response shape, capped input and output. Search terms: OpenAI, gpt-5.5, chat completion, LLM, no API key.","url":"https://netintel.dev/openai/gpt-5-5","method":"POST","headers":{},"bodySchema":{"type":"object","$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 8192, capped at 8192."}}},"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-5.5","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":"0.65","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":"$0.65/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.65","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.65","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9XruHCVD2TEjBQgZMtX0K","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.65","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Call OpenAI's GPT-5.5 model via a pay-per-call x402 endpoint at $0.65 USDC per request, with no OpenAI account or API key required.","exampleAgentPrompt":"Ask GPT-5.5 to write a concise executive summary of the following product roadmap — pay per call using USDC, no API key needed: 'Q1: launch mobile app. Q2: expand to EU. Q3: enterprise tier. Q4: AI features.'","exampleUseCases":[{"title":"One-off LLM call without OpenAI account","prompt":"I need to ask GPT-5.5 to draft a short apology email to a client — I don't have an OpenAI account, just run it pay-per-call in USDC."},{"title":"Agent pipeline with per-call LLM billing","prompt":"My automation workflow needs to classify incoming support tickets using GPT-5.5 — route each one through a pay-per-request endpoint so I'm billed in USDC only when it runs."},{"title":"Rapid GPT-5.5 prototype without subscription","prompt":"I'm prototyping a chatbot and want to try GPT-5.5 right now — just send it a system prompt saying 'You are a helpful cooking assistant' and a user message asking for a quick pasta recipe, billed per call."}],"resultDescription":"Returns a standard OpenAI chat.completion JSON object containing: the assistant's reply in choices[0].message.content, finish_reason, model name, a unique completion ID, Unix timestamp, and a usage object with prompt_tokens, completion_tokens, and total_tokens. Output is capped at 8192 tokens.","failureModes":["Payment not provided or insufficient USDC — returns 402 Payment Required","Input messages array missing or malformed — returns 400 Bad Request","Total input characters exceed ~96,000 char cap — request rejected","max_completion_tokens set above 8192 — capped or rejected","OpenAI upstream timeout or error — returns 502 or 503","Invalid role values in messages (not system/user/assistant) — schema validation error"],"whenToPreferThis":"Choose this endpoint when you need GPT-5.5 specifically (not an older model) and want to avoid managing OpenAI API keys or subscriptions — ideal for agents, automation pipelines, or prototypes that need pay-per-call billing in USDC via x402. Prefer this over the gpt-4.1 or gpt-4o siblings when you want the most capable model in the netintel.dev gateway lineup. Skip it if you need streaming responses, function/tool calling, image inputs, or cost-sensitive high-volume usage where a direct OpenAI subscription would be cheaper.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T08:06:41.319Z","isFirstParty":false}