{"uid":"cap_wtRcbbwzv7TPs2q3tfns2","slug":"x402-gateway-production-up-railway-app-9c4aa976","name":"GPT-5 Nano via x402 Gateway","description":"OpenAI's cheapest GPT-5 tier — ultra-affordable for high-volume agent tasks","url":"https://x402-gateway-production.up.railway.app/api/llm/gpt-5-nano?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","bodyType","body","method"],"properties":{"body":{"type":"object","required":["messages"],"properties":{"seed":{"type":"integer","description":"Model-supported seed; see /docs/llm-capabilities.md."},"tools":{"type":"array","items":{"type":"object","required":["function"],"properties":{"type":{"enum":["function"],"type":"string"},"function":{"type":"object","properties":{"name":{"type":"string"},"strict":{"type":"boolean"},"parameters":{"type":"object"},"description":{"type":"string"}}}}},"description":"Client-executed function definitions; return results using role=tool and tool_call_id."},"stream":{"type":"boolean","description":"Return live OpenAI-compatible SSE after payment settlement."},"plugins":{"type":"array","items":{"type":"object","required":["pdf"],"properties":{"id":{"enum":["file-parser"],"type":"string"},"pdf":{"type":"object","properties":{"engine":{"enum":["native"],"type":"string"}}}}},"description":"Optional native PDF parser only; automatically enabled for file inputs."},"messages":{"type":"array","items":{"type":"object","anyOf":[{"required":["content"]},{"required":["tool_calls"]}],"required":["role"],"properties":{"name":{"type":"string"},"role":{"enum":["system","developer","user","assistant","tool"],"type":"string"},"content":{"oneOf":[{"type":"string"},{"type":"null"},{"type":"array","items":{"type":"object","required":["type"],"properties":{"type":{"enum":["text","image_url","file"],"type":"string"}},"additionalProperties":true},"maxItems":100,"minItems":1}]},"refusal":{"type":["string","null"]},"reasoning":{"type":"string"},"tool_calls":{"type":"array","items":{"type":"object"}},"annotations":{"type":"array","items":{"type":"object"}},"tool_call_id":{"type":"string"},"cache_control":{"type":"object"},"reasoning_details":{"type":"array","items":{"type":"object"}}},"additionalProperties":false},"maxItems":100,"minItems":1,"description":"Text or model-supported multimodal messages; assistant tool calls may have null content"},"reasoning":{"type":"object","description":"Model-supported reasoning; see /docs/llm-capabilities.md."},"max_tokens":{"type":"integer","example":1024,"description":"Total output budget, including reasoning. Use this or max_completion_tokens."},"tool_choice":{"oneOf":[{"enum":["auto","none","required"],"type":"string"},{"type":"object"}],"description":"Model-supported tool_choice; see /docs/llm-capabilities.md."},"stream_options":{"type":"object","description":"Optional include_usage boolean; usage is always requested upstream."},"response_format":{"type":"object","description":"Model-supported response_format; see /docs/llm-capabilities.md."},"reasoning_effort":{"type":"string","description":"Model-supported reasoning_effort; see /docs/llm-capabilities.md."},"include_reasoning":{"type":"boolean","description":"Model-supported include_reasoning; see /docs/llm-capabilities.md."},"max_completion_tokens":{"type":"integer","description":"Alias for total output budget; bounded by model maxOutputTokens."}},"additionalProperties":false},"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","required":["choices","content"],"properties":{"model":{"type":"string"},"usage":{"type":"object","description":"Provider token and usage accounting, when returned."},"choices":{"type":"array","items":{"type":"object","properties":{"index":{"type":"integer"},"message":{"type":"object","properties":{"role":{"type":"string"},"content":{"type":["string","null"]},"tool_calls":{"type":"array","items":{"type":"object"}}}},"finish_reason":{"type":["string","null"]}}}},"content":{"type":"string","description":"Convenience copy of the first assistant message's text."}}}}}}},"responseSchema":null,"example":{"request":{"messages":[{"role":"user","content":"Summarize the following product review in two sentences: 'The battery life is amazing and the screen is gorgeous, but the camera quality disappointed me and setup took forever.'"}],"max_tokens":100},"response":{"model":"openai/gpt-5-nano-2025-08-07","usage":{"cost":0.0000276,"is_byok":false,"cost_details":{"upstream_inference_cost":0.0000276,"upstream_inference_prompt_cost":0.000002,"upstream_inference_completions_cost":0.0000256},"total_tokens":104,"prompt_tokens":40,"completion_tokens":64,"prompt_tokens_details":{"audio_tokens":0,"video_tokens":0,"cached_tokens":0,"cache_write_tokens":0},"completion_tokens_details":{"audio_tokens":0,"image_tokens":0,"reasoning_tokens":64}},"content":""}},"exampleRequest":{"messages":[{"role":"user","content":"Summarize the following product review in two sentences: 'The battery life is amazing and the screen is gorgeous, but the camera quality disappointed me and setup took forever.'"}],"max_tokens":100},"tags":["x402"],"displayCostAmount":"0.002000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.002000/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lb-j3E_a1AEhvTJ0GbOZW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calls OpenAI's GPT-5 Nano model — the cheapest GPT-5 tier — via a pay-per-call x402 gateway for high-volume, cost-sensitive agent tasks","exampleAgentPrompt":"Use the cheapest GPT-5 model to summarize the following product review in two sentences: 'The battery life is amazing and the screen is gorgeous, but the camera quality disappointed me and setup took forever.'","exampleUseCases":null,"resultDescription":"A generated text response from GPT-5 Nano — typically a completion, answer, summary, or classification based on the input prompt, returned as a JSON payload with the model output.","failureModes":["Payment not included or insufficient USDC — 402 Payment Required","Prompt too long for model context window — 400 Bad Request","Model temporarily unavailable on gateway — 503 Service Unavailable","Malformed request body — 400 with validation error","Rate limit exceeded on gateway — 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when cost-per-call is the primary concern and you need GPT-5 quality at the lowest available tier — ideal for high-volume automation, bulk classification, summarization pipelines, or any agent loop making many LLM calls. Prefer over GPT-4o or Claude endpoints when the task is straightforward and does not require advanced reasoning or multimodal input.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T06:47:44.752Z","isFirstParty":false,"canonicalSlug":"x402-gateway-production-up-railway-app-9c4aa976"}