Bankr Web3 Sign & Submit API
Enables synchronous signing of cryptographic messages and direct submission of raw blockchain transactions across multiple chains.
The Bankr Sign & Submit API skill empowers developers to perform low-level Web3 operations directly within Claude Code using Bankr's multi-chain DeFi infrastructure. It provides specialized guidance for synchronous endpoints, allowing for immediate signing of plain text messages, EIP-712 typed data (permits), and raw transactions without the need for job polling. This skill is essential for building efficient Web3 workflows, including wallet authentication, gasless approvals, and the execution of pre-constructed calldata on networks like Base, Ethereum, and Polygon.
Key Features
01Direct submission of raw transactions with real-time hash returns
02Synchronous message signing using personal_sign and EIP-712
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04On-chain transaction confirmation and gas usage tracking
05Multi-chain support for Base, Ethereum, and Polygon networks
06Structured handling of EIP-712 permits and gasless approval workflows
Use Cases
01Authenticating users by signing unique nonces or plain text messages
02Executing gasless token approvals through EIP-2612 permit signatures
03Broadcasting complex DeFi transactions pre-built by external smart contract tools