# Optimism SDK (Viem extension)

**Canonical:** https://apis.io/apis/optimism/viem-sdk/  
**Provider:** Optimism — https://apis.io/providers/optimism/  
**Base URL:** https://viem.sh/op-stack  
**Documentation:** https://docs.optimism.io/app-developers/tutorials/bridging/cross-dom-solidity

Optimism SDK (Viem extension) is one of 10 APIs that [Optimism](https://apis.io/providers/optimism/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include SDK, TypeScript, Viem, and Cross-Chain. The published artifact set on APIs.io includes API documentation.

Modern Optimism SDK exposed as a Viem extension (viem/op-stack) for L1<->L2 message tracking, deposit and withdrawal flows, fee estimation, and Superchain multi-chain helpers.

## Machine-readable artifacts (1)

- **Documentation** — https://viem.sh/op-stack

## Other Optimism APIs (9)

- [OP Mainnet JSON-RPC](https://apis.io/apis/optimism/mainnet-rpc/)
- [OP Sepolia JSON-RPC](https://apis.io/apis/optimism/sepolia-rpc/)
- [Optimism Bridge (Standard Bridge)](https://apis.io/apis/optimism/bridge/)
- [OP Stack](https://apis.io/apis/optimism/op-stack/)
- [Superchain Registry](https://apis.io/apis/optimism/superchain-registry/)
- [Supersim](https://apis.io/apis/optimism/supersim/)
- [Optimism Etherscan](https://apis.io/apis/optimism/etherscan-explorer/)
- [Optimism Blockscout](https://apis.io/apis/optimism/blockscout-explorer/)
- [Optimism JSON-RPC API](https://apis.io/apis/optimism/optimism-json-rpc-api/)

## Tags

SDK, TypeScript, Viem, Cross-Chain

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/optimism/viem-sdk/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/optimism/.