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Sei exposes native chain functionality through precompiled contracts at deterministic EVM addresses. You can call them from any EVM library (viem, ethers, or wagmi) with the ABIs that @sei-js/precompiles exports. You do not need a special SDK. Available precompiles include:
  • Bank: query the native SEI bank balance
  • Staking: delegate, undelegate, and query delegations
  • Distribution: claim staking rewards
  • Governance: vote on active proposals
  • JSON: parse JSON payloads within contracts
  • P256: verify P-256 elliptic curve signatures

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Try it live

You can call precompiles like any other contract, even with a plain eth_call from the browser. This snippet calls name("usei") on the Bank precompile at 0x0000000000000000000000000000000000001001 on Sei Mainnet. The response is ABI-encoded. It contains the bytes 53 45 49, which are ASCII for SEI. For installation instructions, code examples (viem and ethers), common patterns, and a full working Node.js script, see the precompiles reference:

Precompile example usage

Usage examples for all precompiles with viem and ethers: Bank, Staking, Distribution, Governance, JSON, and P256.
For the full ABI reference and every available function on each precompile, see these pages:

Staking precompile

Governance precompile

Distribution precompile

JSON precompile

P256 precompile