> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-eb-mini-app-ia-overhaul.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Base App Compatibility

> Which Mini App features are supported in Base App (TBA) today

Base App is working towards full compatibility with the Farcaster Mini App SDK. During beta, some features are not yet supported.

## Currently Unsupported (examples)

* Environment detection: `sdk.isInMiniApp()` (ETA 8/6)
* Haptic feedback methods: `sdk.haptics.*` (ETA 8/13)
* Token actions: `sdk.actions.swapToken()` (ETA 8/6)
* Notifications: not yet supported
* Mini App actions: `.addMiniApp()`, `.requestCameraAndMicrophoneAccess()` (ETA 8/13)

## Wallet Interactions

* `sdk.actions.getEthereumProvider()` — Base App exposes an EIP‑1193 provider; use MiniKit/Wagmi or window provider detection.

## Navigation & Links

* Avoid direct Farcaster/warpcast intent URLs; use SDK actions like `composeCast()`
* For external links, prefer `openUrl()` over raw anchors

## Supported Chains

Base, Mainnet, Optimism, Arbitrum, Polygon, Zora, BNB, Avalanche C‑Chain

## Development Notes

* Use `openUrl()` for external navigation
* Use `composeCast()` instead of composer URLs
* Provide alternatives for haptic feedback
* Avoid relying on location context for core flows
* To detect Base App, check `context.client.clientFid` (Base App: `309857`)

We are actively expanding compatibility and will update this page as support increases.