{"openapi":"3.1.0","info":{"title":"Cronos API","version":"1.0.0","description":"Real-time on-chain data for Cronos (chain-id 25) — the EVM-compatible Layer-1 (Cosmos SDK / Ethermint) backed by Crypto.com, using CRO as its native coin. Query live network status (latest block height, network id, client version), fetch any block by height or the latest one (timestamp, transaction count, gas used / limit, base fee, miner), read the current gas price in wei and gwei, and look up the native CRO balance and transaction count of any address. A keyless, no-account JSON wrapper over the canonical Cronos JSON-RPC node — decoded from hex into plain decimals and human-readable CRO so you do not have to. Ideal for explorers, wallets, dashboards, gas estimators and analytics on Cronos.","contact":{"name":"PremiumApi","url":"https://www.oanor.com/by/premiumapi"}},"servers":[{"url":"https://api.oanor.com/cronos-api","description":"oanor gateway"}],"tags":[{"name":"Network"},{"name":"Blocks"},{"name":"Gas"},{"name":"Accounts"},{"name":"Meta"}],"components":{"securitySchemes":{"oanorKey":{"type":"apiKey","in":"header","name":"x-oanor-key","description":"Get your key at https://www.oanor.com/developer/keys"}}},"security":[{"oanorKey":[]}],"paths":{"/v1/status":{"get":{"operationId":"get_v1_status","tags":["Network"],"summary":"Network status (latest block, chain id, client version)","description":"","parameters":[],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"chain":"Cronos","chain_id":25,"network_id":25,"rpc_healthy":true,"latest_block":77304817,"native_symbol":"CRO","client_version":"Version dev ()\nCompiled at  using Go go1.25.0 (arm64)"},"meta":{"timestamp":"2026-06-15T20:41:16.756Z","request_id":"9150f6cd-5cd4-4830-bda4-0705902dfc4c"},"status":"ok","message":"Chain status retrieved successfully","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/block":{"get":{"operationId":"get_v1_block","tags":["Blocks"],"summary":"Block by height (or latest)","description":"","parameters":[{"name":"number","in":"query","required":false,"description":"Block height (decimal or 0x-hex), or 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respond"}}}},"/v1/gas":{"get":{"operationId":"get_v1_gas","tags":["Gas"],"summary":"Current gas price (wei + gwei)","description":"","parameters":[],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"at_block":77304817,"gas_price_wei":"378750000000","native_symbol":"CRO","gas_price_gwei":378.75},"meta":{"timestamp":"2026-06-15T20:41:17.009Z","request_id":"c7841c02-e3fb-4463-8151-469c053d6eb2"},"status":"ok","message":"Gas price retrieved successfully","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/balance":{"get":{"operationId":"get_v1_balance","tags":["Accounts"],"summary":"Native CRO balance and transaction count of an 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