{"name":"BlockRun","description":"BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 74 LLMs plus image, video, music and speech generation, web search, prediction-market and on-chain data, and multi-chain RPC. Every paid call is billed per request in USDC over x402, batched through Circle Gateway and settled on Polygon, Arbitrum One, OP Mainnet, Unichain, Avalanche, Sonic, Sei Network, World Chain, HyperEVM, Ethereum, Arc — no API keys, no accounts, no subscriptions; read the price off the 402 and retry with a signed X-PAYMENT header. 4 open-weight chat models are free and need no wallet.","url":"https://nano.blockrun.ai/api/v1","provider":{"organization":"BlockRun, Inc.","url":"https://nano.blockrun.ai"},"version":"1.0.0","protocolVersion":"0.3.0","documentationUrl":"https://nano.blockrun.ai/llms.txt","capabilities":{"streaming":true,"pushNotifications":false,"stateTransitionHistory":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json","text/event-stream"],"securitySchemes":{"x402":{"type":"apiKey","in":"header","name":"X-PAYMENT","description":"x402 payment signature; see the 402 response for requirements."}},"security":[{"x402":[]}],"skills":[{"id":"chat","name":"Chat & LLM routing","description":"OpenAI-, Anthropic- and Responses-compatible chat across frontier and open-weight models.","tags":["llm","chat","routing"],"examples":[]},{"id":"media","name":"Image, video, music, speech","description":"Generation endpoints priced per call.","tags":["image","video","audio","tts"],"examples":[]},{"id":"search","name":"Web & neural search","description":"Live web/X search and Exa neural search + page extraction.","tags":["search","exa"],"examples":[]},{"id":"markets","name":"Prediction & crypto markets","description":"Predexon prediction-market data, on-chain and price feeds, DEX swaps.","tags":["polymarket","kalshi","crypto","defi"],"examples":[]},{"id":"rpc","name":"Multi-chain RPC","description":"JSON-RPC for 40 chains through one paid endpoint.","tags":["rpc","ethereum","solana","base"],"examples":[]},{"id":"payments","name":"Pay per call in USDC (Circle Gateway nanopayments)","description":"x402: 402 challenge → signed exact USDC authorization → retry. Many calls batch into one on-chain settlement via Circle Gateway.","tags":["x402","usdc","payments"],"examples":[]}],"links":{"llms":"https://nano.blockrun.ai/llms.txt","llmsFull":"https://nano.blockrun.ai/llms-full.txt","openapi":"https://nano.blockrun.ai/openapi.json","x402Manifest":"https://nano.blockrun.ai/.well-known/x402","agentCard":"https://nano.blockrun.ai/.well-known/agent-card.json","discovery":"https://nano.blockrun.ai/discovery","skill":"https://nano.blockrun.ai/skill.md","agentReference":"https://nano.blockrun.ai/agent.md","models":"https://nano.blockrun.ai/api/v1/models","contact":"mailto:hello@blockrun.ai"}}