BlockRun

BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 88 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 on Base — no API keys, no accounts, no subscriptions; read the price off the 402 and retry with a signed X-PAYMENT header. 7 open-weight chat models are free and need no wallet.

Skills

• Chat & LLM routing
  OpenAI-, Anthropic- and Responses-compatible chat across frontier and open-weight models.
  llmchatrouting
• Image, video, music, speech
  Generation endpoints priced per call.
  imagevideoaudiotts
• Web & neural search
  Live web/X search and Exa neural search + page extraction.
  searchexa
• Prediction & crypto markets
  Predexon prediction-market data, on-chain and price feeds, DEX swaps.
  polymarketkalshicryptodefi
• Multi-chain RPC
  JSON-RPC for 40 chains through one paid endpoint.
  rpcethereumsolanabase
• Pay per call in USDC
  x402: 402 challenge → signed exact USDC authorization → retry. Settles on-chain.
  x402usdcpayments

How to call

https://blockrun.ai/api/v1

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