{"uid":"cap_-r8pMgUvsIoKwsos27a5Q","slug":"synapse-ai-complete-api-005bb675","name":"Synapse AI-Complete API","description":"Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.","url":"https://anibalb.duckdns.org/x402/ai-complete?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["prompt"],"properties":{"prompt":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"completion":"..."}},"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_Qt-k-XimOfcxND02pdp4X","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":"Answers a natural language prompt using an AI completion endpoint, paid per call in USDC via x402 with no API keys required.","exampleAgentPrompt":"Can you use the Synapse AI-complete endpoint to answer this question: 'What are the top 3 use cases for zero-knowledge proofs in blockchain?' — it pays $0.01 USDC per call, no API key needed.","exampleUseCases":[{"title":"Permissionless AI Q&A for crypto research","prompt":"Use the Synapse pay-per-call AI endpoint to answer this prompt: 'Explain how Base Layer 2 reduces Ethereum gas fees and give me two real-world examples.'"},{"title":"No-account AI summarization task","prompt":"I don't want to sign up for anything — just use the Synapse x402 AI-complete API to summarize this: 'Decentralized finance removes intermediaries by using smart contracts to automate financial transactions on a public blockchain.'"},{"title":"Quick AI fact-check via micropayment","prompt":"Run this prompt through the Synapse AI-complete endpoint and tell me what it says: 'Is Solana a proof-of-work or proof-of-stake blockchain, and what consensus mechanism does it actually use?'"}],"resultDescription":"Returns a JSON object with a 'completion' field containing the AI-generated text response to the submitted prompt.","failureModes":["Payment not provided or insufficient USDC — returns 402 Payment Required","Missing required 'prompt' query parameter — returns 400 Bad Request","Invalid HTTP method (only GET/HEAD/DELETE accepted) — returns 405 Method Not Allowed","Service unavailable or backend AI model unreachable — returns 503","Malformed input object missing 'type' or 'method' fields — returns 400"],"whenToPreferThis":"Choose this endpoint when you need a quick, permissionless AI text completion without account registration or API keys, and are comfortable paying $0.01 USDC per call via x402 on Base. Ideal for agents operating in crypto-native environments where micropayment-based API access is preferred over subscription models.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:40:38.598Z","isFirstParty":false,"canonicalSlug":"synapse-ai-complete-api-005bb675"}