{"slug":"saylorinnovations-com-api-chain-pending-tx-ff3e73","title":"Transaction status on 16 EVM chains","host":"saylorinnovations.com","method":"GET","resource":"https://saylorinnovations.com/api/chain/pending-tx","category":"code","description":"Transaction status on 16 EVM chains: pending in the mempool or confirmed, execution result, fee against the base fee, nonce gap and confirmations.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":486,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:42161","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"chain":"ethereum","hash":"0x4161950dcf2da21c66767c7935ecaffbb78042b5a1f369d93134decaee69247a"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"chain":{"description":"chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id","type":"string"},"hash":{"description":"the transaction hash (0x plus 64 hex characters)","type":"string"}},"required":["chain","hash"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"block_number":{"description":"block that included the transaction, null while pending","type":["number","null"]},"chain":{"description":"the chain name that was queried","type":"string"},"chain_id":{"description":"EIP-155 chain id of that network","type":"number"},"confirmations":{"description":"blocks on top of the including block, counting it","type":["number","null"]},"current_base_fee_gwei":{"description":"base fee of the latest block in gwei","type":["number","null"]},"execution":{"description":"success or reverted, once mined","type":["string","null"]},"fee_below_base_fee":{"description":"true when a pending transaction's fee cap is under the current base fee","type":["boolean","null"]},"from":{"description":"sender address","type":["string","null"]},"gas_limit":{"description":"gas limit set on the transaction","type":"number"},"gas_price_gwei":{"description":"gas price in gwei (effective price once mined)","type":["number","null"]},"gas_used":{"description":"gas actually used, once mined","type":["number","null"]},"hash":{"description":"the transaction hash that was looked up","type":"string"},"max_fee_per_gas_gwei":{"description":"fee cap in gwei for type-2 transactions","type":["number","null"]},"max_priority_fee_gwei":{"description":"tip cap in gwei for type-2 transactions","type":["number","null"]},"native_symbol":{"description":"native currency of the chain","type":"string"},"nonce":{"description":"sender nonce of this transaction","type":["number","null"]},"nonce_ahead_of_account":{"description":"how many nonces a pending transaction sits ahead of the sender's confirmed nonce","type":["number","null"]},"note":{"description":"plain-language reading of the result","type":"string"},"source":{"description":"where the data was read from","type":"string"},"status":{"description":"pending, confirmed or not_found","type":"string"},"to":{"description":"recipient or contract, null for contract creation","type":["string","null"]},"value_native":{"description":"value sent in the native currency","type":"number"}},"required":["chain","chain_id","hash","status","note","source"],"type":"object"},"type":{"const":"json","type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-21","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":486,"error":null}],"description_full":"Transaction status on 16 EVM chains: pending in the mempool or confirmed, execution result, fee against the base fee, nonce gap and confirmations.","last_updated":"2026-10-21T04:11:10.267Z","schemes":["exact"]}