> ## Documentation Index > Fetch the complete documentation index at: https://docs.optimism.io/llms.txt > Use this file to discover all available pages before exploring further. # Tools & SDKs Support Matrix > One page that differentiates the OP Stack SDK surfaces and developer tools — what each is for, who owns it, where its canonical docs live, and its support status. Items on this page refer to third-party projects or products that are not maintained by Optimism. They are provided for convenience; refer to each project's own documentation as the source of truth. This page is the canonical hub for the tools and SDKs that surround the OP Stack. Following the [content guide](/op-stack/contribute/content-guide), each listing links exactly one canonical documentation home — this page routes, it does not restate. What gets listed here (and what gets removed) is governed by the [listing criteria](/app-developers/tools-sdks/listing-criteria). ## Support Status Levels | Status | Meaning | | --------------------- | ------------------------------------------------------------------------------------------ | | **Production** | Stable and recommended for production use by its owner. | | **Developer preview** | Usable today, but its owner has declared it not yet ready for production; APIs may change. | | **Experimental** | A staging ground. Features may change, move, or be upstreamed elsewhere. | ## The Matrix | Tool | Purpose | Owner | Canonical docs | Support status | | ---------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- | | [`viem/op-stack`](https://viem.sh/op-stack) | General-purpose TypeScript client for OP Stack chains: deposits, withdrawals, L1 gas estimation, and all standard chain interaction, built into viem | [wevm](https://github.com/wevm/viem) (third party) | [viem.sh/op-stack](https://viem.sh/op-stack) | Production | | [`@eth-optimism/viem`](https://github.com/ethereum-optimism/ecosystem/tree/main/packages/viem) | viem extension for OP Stack features that have not yet been upstreamed into viem — Superchain interop actions and utilities; used by this site's bridging and interop tutorials | Optimism ([`ecosystem`](https://github.com/ethereum-optimism/ecosystem) repo) | [Package README & SDK reference](https://github.com/ethereum-optimism/ecosystem/tree/main/packages/viem#readme) | Experimental | | [Actions SDK](https://github.com/ethereum-optimism/actions) (`@eth-optimism/actions-sdk`) | High-level abstractions for building onchain apps — wallet, lend, and swap namespaces over Superchain protocols | Optimism ([`actions`](https://github.com/ethereum-optimism/actions) repo) | [Actions quickstart](/app-developers/quickstarts/actions) and [reference](/app-developers/reference/actions/integrating-wallets) on this site | Developer preview | | [wagmi](https://wagmi.sh) | React hooks for Ethereum apps; works with OP Stack chains as with any EVM chain | [wevm](https://github.com/wevm/wagmi) (third party) | [wagmi.sh](https://wagmi.sh) | Production | | [supersim](/app-developers/tools/supersim) | Local Superchain simulator: one L1 plus multiple OP Stack L2s for testing L1↔L2 and L2↔L2 message passing without deploying to live networks | Optimism ([`supersim`](https://github.com/ethereum-optimism/supersim) repo) | [Supersim docs](https://supersim.pages.dev) | Developer preview (all releases are alpha pre-releases; interop features in active development) | | [super-cli](https://github.com/ethereum-optimism/super-cli) (`sup`) | Foundry companion CLI for multichain workflows: deploy and verify contracts on multiple chains at once, bridge funds, use connected wallets | Optimism ([`super-cli`](https://github.com/ethereum-optimism/super-cli) repo) | [Repository README](https://github.com/ethereum-optimism/super-cli#readme) | Experimental | | [superchain-registry](https://github.com/ethereum-optimism/superchain-registry) tooling | Not an SDK — the source-of-truth library of chain configs that OP Stack software (such as `op-node` and `op-geth`) consumes, plus the `just` tasks and validation checks used to add and verify a chain | Optimism ([`superchain-registry`](https://github.com/ethereum-optimism/superchain-registry) repo) | [Registry operations docs](https://github.com/ethereum-optimism/superchain-registry/tree/main/docs) | Production | ## Choose an SDK Surface Three of the rows above are TypeScript SDK surfaces that are easy to confuse. The distinction: * **Start with [`viem/op-stack`](https://viem.sh/op-stack).** viem provides first-class OP Stack support in the core library: extend any viem client with `publicActionsL2()` (and friends) imported from `viem/op-stack` to get deposits, withdrawals, and L1 gas estimation. If a feature is available here, this is its production home. * **Reach for [`@eth-optimism/viem`](https://github.com/ethereum-optimism/ecosystem/tree/main/packages/viem) when you need what viem does not have yet.** The package's stated goal is to upstream as much as possible into viem itself; until then it is the home of Superchain interop actions and other pre-production features. The [interop tutorials](/app-developers/tutorials/interoperability/manual-relay) and [bridging tutorials](/app-developers/tutorials/bridging/cross-dom-bridge-erc20) on this site use it. * **Use the [Actions SDK](/app-developers/quickstarts/actions) for app-level building blocks, not chain plumbing.** Where the two viem surfaces expose protocol operations, the Actions SDK offers wallet, lend, and swap namespaces for building end-user apps. It is a developer preview and not yet ready for production use. ## Using wagmi With the OP Stack If you build with React, you likely start from wagmi — and it works with OP Stack chains out of the box. OP Stack chains are standard EVM chains, and `wagmi/chains` ships their definitions (`optimism`, `base`, `zora`, and every other chain from `viem/chains`). Nothing OP-specific is required for reads, writes, or wallet connections. For OP Stack–specific operations — deposits, withdrawals, interop — use the fact that wagmi is a wrapper over viem: 1. Get a viem client from wagmi with the [`useClient`](https://wagmi.sh/react/api/hooks/useClient) or [`useConnectorClient`](https://wagmi.sh/react/api/hooks/useConnectorClient) hooks, following wagmi's own [viem guide](https://wagmi.sh/react/guides/viem). 2. Extend that client with the [`viem/op-stack`](https://viem.sh/op-stack) actions and call them directly. For Superchain interop specifically, the experimental [`@eth-optimism/wagmi`](https://github.com/ethereum-optimism/ecosystem/tree/main/packages/wagmi) package provides React hooks (such as `useSendL2ToL2Message`) over `@eth-optimism/viem`. Treat it like its underlying package: experimental. ## Next Steps * Read the [listing criteria and maintenance-sweep policy](/app-developers/tools-sdks/listing-criteria) that govern this page. * Adding a chain rather than building an app? See [Join the Superchain Registry](/chain-operators/guides/join-superchain-registry). * For where content belongs in general, see the [content guide](/op-stack/contribute/content-guide).