{"uid":"cap_Bfw7nZh0b78Fs5TXrRIUf","slug":"netintel-dev-gpt-4-1-nano-chat-completions-x402-2daece65","name":"netintel.dev GPT-4.1-nano Chat Completions (x402)","description":"Call OpenAI's gpt-4.1-nano via a single pay-per-call x402 endpoint — no OpenAI account or API key needed, pay $0.005 per request in USDC. Standard OpenAI chat.completions request/response shape, capped input and output. Search terms: OpenAI, gpt-4.1-nano, chat completion, LLM, no API key.","url":"https://netintel.dev/openai/gpt-4-1-nano","method":"POST","headers":{},"bodySchema":{"type":"object","$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":{"top_p":{"type":"number","description":"Nucleus sampling. Optional."},"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 ~24000 chars total."},"max_tokens":{"type":"number","description":"Max output tokens. Optional — defaults to 1024, capped at 1024."},"temperature":{"type":"number","description":"Sampling temperature. Optional."}}},"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-4.1-nano","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":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_61X8hiAGjYUO_4NKa7WAy","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs an OpenAI GPT-4.1-nano chat completion via a pay-per-call x402 endpoint — no OpenAI account or API key required, $0.005 USDC per request.","exampleAgentPrompt":"Ask GPT-4.1-nano to write a one-paragraph summary of quantum entanglement in plain English, keeping the output under 200 tokens — I want to pay per call without setting up an OpenAI account.","exampleUseCases":[{"title":"Lightweight agent reasoning step","prompt":"Have GPT-4.1-nano decide which of these three customer support categories best fits this message: 'my order arrived damaged' — return just the category name, keep output short."},{"title":"Quick copy generation on a budget","prompt":"Use the cheap nano model to write a punchy 2-sentence product description for a reusable water bottle — I need to generate hundreds of these without burning through an expensive API quota."},{"title":"Serverless chatbot backend","prompt":"Send this conversation history to GPT-4.1-nano and get the next assistant reply — system prompt is 'You are a friendly cooking assistant', and the user just asked how long to boil pasta."}],"resultDescription":"Returns a standard OpenAI chat.completions response object containing: an array of choices (each with an assistant message content and finish_reason), token usage breakdown (prompt_tokens, completion_tokens, total_tokens), model name, completion ID, and a Unix timestamp. Output is capped at 1024 tokens.","failureModes":["Payment not received or insufficient USDC — x402 payment required error","Input messages array exceeds ~24,000 character cap — request rejected","max_tokens exceeds 1024 hard cap — clamped or rejected","Malformed messages array (missing role or content fields) — validation error","Upstream OpenAI API unavailability — 502/503 gateway error","Invalid bodyType value — schema validation failure"],"whenToPreferThis":"Choose this endpoint when you need GPT-4.1-nano inference without managing an OpenAI account or API key, and you want true pay-per-call billing via x402 micropayments in USDC. Ideal for agent pipelines that need a cheap, fast, low-token-count LLM step (under $0.01/call), serverless or ephemeral environments where credential management is burdensome, or when building multi-tenant systems where each call is independently metered. Prefer GPT-4.1 or GPT-4o sibling endpoints on the same host if you need higher quality or longer context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:45:35.964Z","isFirstParty":false}