{"uid":"cap_xzt9MgOgFayMSxnRluLXW","slug":"inference402-large-chat-llama-3-3-70b-b955cd62","name":"Inference402 Large Chat (Llama 3.3 70B)","description":"Pay-per-call AI inference for agents: chat (Llama 3.3 70B / 3.1 8B), structured JSON, summarize, translate (incl. Egyptian Arabic), extract, classify, sentiment, keywords, rewrite, embeddings, moderation, vision and speech-to-text. USDC on Base mainnet over x402. No API key, no account.","url":"https://inference402.worlddata402.workers.dev/v1/chat/large?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"messages":{"type":"array","items":{"type":"object","required":["role","content"],"properties":{"role":{"enum":["system","user","assistant"],"type":"string"},"content":{"type":"string"}}},"maxItems":50,"minItems":1},"max_tokens":{"type":"integer","default":512,"maximum":1024,"minimum":1},"temperature":{"type":"number","default":0.6,"maximum":2,"minimum":0}}},"responseSchema":{"type":"json","example":{"model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","usage":{"prompt_tokens":40,"completion_tokens":80},"content":"An idempotency key ..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sviful6oV2S_jsvtaqeDt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Pay-per-call conversational AI chat using Llama 3.3 70B, billed at $0.01 USDC per request via x402 protocol on Base mainnet — no API key required.","exampleAgentPrompt":"Ask the Llama 3.3 70B model: 'You are a helpful assistant.' as the system prompt, then send the user message 'Explain the difference between TCP and UDP in simple terms' — pay the $0.01 USDC fee per call and keep the response under 512 tokens.","exampleUseCases":[{"title":"Crypto-native agent reasoning step","prompt":"Send this reasoning task to the 70B model: system prompt is 'You are a logical reasoning assistant', user message is 'A farmer has 17 sheep, all but 9 die — how many are left? Explain your reasoning.' Keep it under 300 tokens and pay per call with USDC."},{"title":"Customer email draft generation","prompt":"Use the large Llama model to draft a professional reply to this customer complaint: 'Your service went down for 3 hours and I lost business.' — set the system prompt to 'You are a polite customer support agent' and generate up to 400 tokens."},{"title":"Multi-turn coding conversation","prompt":"Start a conversation with the 70B AI: first message should be 'You are an expert Python developer', then ask 'Write me a function that takes a list of dicts and returns them sorted by a given key, with a usage example.' Set temperature to 0.3 for consistent output."}],"resultDescription":"Returns a JSON object containing the generated text content, the model identifier (e.g. @cf/meta/llama-3.3-70b-instruct-fp8-fast), and token usage stats (prompt_tokens and completion_tokens). The main response text is in the 'content' field.","failureModes":["Payment not received or insufficient USDC balance — returns HTTP 402 Payment Required","Messages array is empty or malformed — returns validation error","max_tokens exceeds 1024 — schema validation failure","Temperature outside 0-2 range — schema validation failure","Messages array exceeds 50 items — validation error","Model overload or Cloudflare Workers timeout — transient 5xx error"],"whenToPreferThis":"Choose this endpoint when you need high-quality 70B-class text generation with no account setup, paying per call in USDC via x402 — ideal for autonomous agents that need to budget AI spend precisely, for crypto-native workflows, or for one-off inference tasks that don't justify a subscription. Prefer the sibling 8B endpoint if cost is the priority and task complexity is lower.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:38:16.751Z","isFirstParty":false,"canonicalSlug":"inference402-large-chat-llama-3-3-70b-b955cd62"}