{"uid":"cap_gEm-EAbFXk_X4cbK4gd_m","slug":"x402engine-claude-haiku-llm-api-3c8b94cc","name":"x402engine Claude Haiku LLM API","description":"Anthropic's fastest model — affordable and quick for simple tasks and high throughput","url":"https://x402engine.app/api/llm/claude-haiku?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_nHi6cdfaSuT3IW5KrtzhF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs Anthropic's Claude Haiku model via a pay-per-call HTTP 402 micropayment endpoint for fast, affordable text generation","exampleAgentPrompt":"Ask Claude Haiku to summarize this customer support ticket in 2-3 sentences and suggest a response category: 'My order arrived damaged and customer service hasn't replied in 5 days.' Keep the output under 200 tokens.","exampleUseCases":[{"title":"Affordable agent reasoning step","prompt":"Use Claude Haiku to classify this incoming support message as 'billing', 'technical', or 'general' and return just the category label — the message is: 'I was charged twice for my subscription this month.'"},{"title":"High-throughput content summarization","prompt":"I have 50 product descriptions I need condensed to one sentence each for a catalog — run them through Claude Haiku one at a time and keep max tokens at 60 per response."},{"title":"Lightweight chatbot backend","prompt":"Power my FAQ chatbot with Claude Haiku — send it the user message 'How do I reset my password?' and a system-style instruction to answer concisely as a helpful assistant, max 150 tokens."}],"resultDescription":"Returns Claude Haiku's generated text completion based on the provided message array. The response contains the model's reply to the conversation, up to the specified max_tokens limit (default 1024). Typical latency is low, suitable for real-time or near-real-time agent use.","failureModes":["Payment not included or insufficient USDC — returns HTTP 402 with payment requirement","Missing required 'messages' field — returns 400 validation error","Empty messages array (minItems: 1 violated) — returns 400","Invalid role values in message objects — returns 400","max_tokens set too high — may be capped or return error","Anthropic API upstream downtime — returns 5xx error","Malformed JSON body — returns 400 parse error"],"whenToPreferThis":"Choose this endpoint when you need fast, affordable Claude Haiku inference on a per-call basis without committing to an Anthropic subscription or managing API keys. It is ideal for AI agents that need to pay programmatically via USDC micropayments, high-throughput pipelines requiring many cheap LLM calls, or prototypes needing Claude's quality at low cost. Prefer it over GPT-based endpoints when Anthropic's Claude output style or safety characteristics are specifically desired.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T02:10:18.429Z","isFirstParty":false,"canonicalSlug":"x402engine-claude-haiku-llm-api-3c8b94cc"}