{"uid":"cap_EgdMYw8OKL-c1m-ogQ1H5","slug":"model-access-gateway-gemini-4-argon-af8bf21e","name":"Model Access Gateway – Gemini 4 Argon","description":"LLM inference API: OpenAI-compatible chat completions for 136 AI models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM), paid per call in USDC on Base with x402. No account, no API key, automatic refund if the model fails.","url":"https://agent402-arb.rosariovitale0096.workers.dev/llm/gemini-4-argon?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"model":{"type":"string","description":"Optional: fixed by the route (google/gemini-4-argon)"},"tools":{"type":"array"},"stream":{"type":"boolean","description":"true: server-sent events after payment"},"messages":{"type":"array","items":{"type":"object","required":["role"],"properties":{"role":{"enum":["system","user","assistant","tool","developer"],"type":"string"},"content":{"type":["string","array","null"]}}},"minItems":1},"max_tokens":{"type":"integer","maximum":16384,"minimum":1,"description":"Optional, default 4096"},"temperature":{"type":"number","maximum":2,"minimum":0},"response_format":{"type":"object"}}},"responseSchema":{"type":"json","example":{"id":"chatcmpl-7f3c2a91","model":"google/gemini-4-argon","usage":{"total_tokens":10,"prompt_tokens":9,"completion_tokens":1},"object":"chat.completion","choices":[{"index":0,"message":{"role":"assistant","content":"OK"},"finish_reason":"stop"}],"created":1791979200}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2nyczNwGWY1rf5CJjeHWS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides OpenAI-compatible chat completions via the Gemini 4 Argon model, billed per request in USDC on Base using the x402 payment protocol — no API key required.","exampleAgentPrompt":"Send this conversation to Gemini 4 Argon and get a response: system prompt is 'You are a helpful assistant', user message is 'Explain quantum entanglement in two sentences' — pay the per-request fee in USDC automatically.","exampleUseCases":[{"title":"Agentic task reasoning with Gemini","prompt":"I need you to reason through this multi-step problem using Gemini 4 Argon: given a list of customer complaints, summarize the top three themes. Here are the complaints: [paste text]. Pay per call in USDC."},{"title":"Crypto-native chatbot backend","prompt":"Build me a quick demo chatbot that uses Gemini 4 Argon for replies — it should work without any API key, just pay per message in USDC so I don't need a subscription."},{"title":"Automated content draft generation","prompt":"Use Gemini 4 Argon to draft a 150-word product description for my new standing desk called the 'ErgoLift Pro' — focus on health benefits and minimal design."}],"resultDescription":"Returns an OpenAI-compatible chat.completion JSON object containing the assistant's reply message, finish reason (e.g. 'stop'), token usage breakdown (prompt, completion, total tokens), a completion ID, creation timestamp, and the model name used.","failureModes":["Payment failure if USDC balance is insufficient or x402 handshake fails","402 Payment Required if the payment header is missing or malformed","Invalid request body if required fields (messages, model) are absent","Model unavailability if Gemini 4 Argon is temporarily offline upstream","Rate limiting or worker timeout on the Cloudflare edge if the request is too large","Malformed JSON body resulting in a 400 error"],"whenToPreferThis":"Choose this endpoint when you need Gemini 4 Argon chat completions with zero signup friction, pay-per-call USDC billing via x402, and OpenAI API compatibility — ideal for agents that manage their own crypto wallets and want to avoid monthly subscriptions or API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:47:40.616Z","isFirstParty":false,"canonicalSlug":"model-access-gateway-gemini-4-argon-af8bf21e"}