{"resource":"https://keyronne.com/api/chain-block","service":"EVM Block","areas":["onchain_reads"],"answering":true,"http_status":402,"latency_ms":87,"price_usdc":0.003,"buyers_30d":4,"calls_30d":4,"description":"Fetch a block header by number, hash, or \"latest\" on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: timestamp, miner, gas used/limit, base fee, transaction count, size. Public JSON-RPC, no API keys. POST a JSON body like: {\"chai","id":"975e7a03ed14","category":"Blockchain reads","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/975e7a03ed14"}