{"slug":"blockrun-ai-api-v1-messages-ec981f","title":"Anthropic-compatible Messages API — pay per token with USDC on Base","host":"blockrun.ai","method":"POST","resource":"https://blockrun.ai/api/v1/messages","category":"market","description":"Anthropic-compatible Messages API — pay per token with USDC on Base","price_listed":0.011,"price_asked":0.011,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":207,"reported_calls_30d":5449,"reported_payers_30d":5,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"bodyFields":{"max_tokens":{"description":"Max output tokens","type":"integer"},"messages":{"description":"Conversation history","type":"array"},"model":{"description":"Anthropic-style model id","type":"string"},"stream":{"description":"Stream response as SSE","type":"boolean"},"system":{"description":"Optional system prompt","type":"string"},"tools":{"description":"Optional tool definitions","type":"array"}},"discoverable":true,"method":"POST","type":"http"},"output_schema":{"properties":{"input":{"properties":{"body":{"properties":{"max_tokens":{"description":"Max output tokens the model may generate","type":"integer"},"messages":{"description":"Conversation history, Anthropic Messages API shape","type":"array"},"model":{"description":"Anthropic-style model id (e.g. anthropic/claude-opus-5, anthropic/claude-sonnet-4.6)","type":"string"},"stream":{"description":"Stream the response as SSE","type":"boolean"},"system":{"description":"Optional system prompt","type":"string"},"temperature":{"description":"Sampling temperature 0–1","type":"number"},"tools":{"description":"Optional tool definitions for tool use","type":"array"}},"required":["model","max_tokens","messages"],"type":"object"}},"type":"object"},"output":{"properties":{"example":{"properties":{"content":{"type":"array"},"id":{"type":"string"},"model":{"type":"string"},"role":{"type":"string"},"type":{"type":"string"},"usage":{"type":"object"}},"type":"object"}},"type":"object"}},"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.011,"price_match":true,"latency_ms":207,"error":null}],"description_full":"Anthropic-compatible Messages API — pay per token with USDC on Base","last_updated":"2026-09-23T11:09:41.345Z","schemes":["exact"]}