{"endpoint":"https://statepulse-api.hahavoid0.workers.dev/blockchain/send","method":"POST","price":"$0.010","description":"Relays a transaction to Base Mainnet, paying the native gas on your behalf and charging your wallet equivalent USDC via EIP-3009 receiveWithAuthorization. Matches: gasless tx relayer, submit transaction base, pay gas in usdc.","example_input":{"target_contract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","calldata":"0x095ea7b300000000000000000000000055014c5b9781682b3cd1eedfd56e85bfe4a33251ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff","max_gas_fee_usdc":"0.50","sender":"0x742d35Cc6634C0532925a3b844Bc454e4438f44e","nonce":"0x0000000000000000000000000000000000000000000000000000000000000002","valid_before":1800000000,"signature":"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},"example_output":{"supported":true,"result":{"status":"RELAYED","gas_fee_collected_usdc":"0.50","payment_tx_hash":"0x...","execution_tx_hash":"0x..."},"confidence":"high"},"request_schema":{"type":"object","required":["target_contract","calldata","max_gas_fee_usdc","sender","nonce","valid_before","signature"],"properties":{"target_contract":{"type":"string","description":"The destination contract address to call"},"calldata":{"type":"string","description":"The hex payload calldata of the call"},"max_gas_fee_usdc":{"type":"string","description":"Maximum USDC authorized for gas payment (e.g. 0.50)"},"sender":{"type":"string","description":"EVM address of the sender paying USDC"},"nonce":{"type":"string","description":"32-byte hex nonce for the EIP-3009 transfer"},"valid_before":{"type":"number","description":"Unix timestamp after which signature is invalid"},"signature":{"type":"string","description":"Hex signature authorizing the USDC receiveWithAuthorization transfer"}}},"response_schema":{"type":"object"}}