> ## Documentation Index
> Fetch the complete documentation index at: https://docs.neynar.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Developer Ecosystem

> Building blocks for developing on Farcaster protocol with Neynar infrastructure

Tools below can help you build on Farcaster more easily

## Libraries and SDKs

* [@neynar/nodejs-sdk](https://github.com/neynarxyz/nodejs-sdk) by Neynar (official library)
* [@neynar/react-native-signin](https://github.com/neynarxyz/siwn/tree/main/react-native-sign-in-with-neynar) by Neynar (official library)
* [farcaster-js library](https://www.npmjs.com/package/@standard-crypto/farcaster-js) for Neynar by [Standard Crypto](https://warpcast.com/gavi/0x69ab635a)
* [Next-js library](https://github.com/alex-grover/neynar-next) for Neynar by [Alex Grover](https://warpcast.com/alexgrover.eth/0x3b27d4e3)
* [GoLang signer generation library](https://gist.github.com/benny-conn/57c073dab01488f3107d126979ee14fd) for Neynar by [Gallery](https://warpcast.com/robin/0x629551fd)
* [SDK](https://github.com/cameronvoell/fcrn) to build on React Native, fetch feed with Neynar APIs by [Cameron Voell](https://warpcast.com/cyrcus/0x8cad5b56)
* [farcaster-py library](https://github.com/vrypan/farcaster-py) for using Neynar Hubs by [vrypan.eth](https://warpcast.com/vrypan.eth)

## Open source clients and bots using Neynar Hubs and APIs

### Web

* [Herocast](https://app.herocast.xyz/feeds) ([github](https://github.com/hellno/herocast/) by [Hellno](https://warpcast.com/hellno.eth/0xcf26ab28)
* [Managed signer client](https://github.com/neynarxyz/farcaster-examples/tree/main/managed-signers) by Neynar

### Mobile

* [Farcaster Expo example](https://github.com/dylsteck/farcaster-expo-example) by [Dylan Steck](https://warpcast.com/dylsteck.eth/0x9bbef5d4)
* [Wownar Expo/RN example](https://github.com/neynarxyz/farcaster-examples/tree/main/wownar-react-native) by Neynar
* [Farcaster Expo example](https://github.com/buidlerfoundation/farcaster-expo-example) by [Edric](https://warpcast.com/edricnguyen.eth/0x20ba4055)
* [Farcaster Expo](https://github.com/mko4444/farcaster-expo) by [Matthew](https://warpcast.com/matthew/0x99a7a6b5)
* [FCRN](https://github.com/cameronvoell/fcrn) by [Cameron Voell](https://warpcast.com/cyrcus/0x8cad5b56)
* [React Native Farcaster Starter](https://github.com/natedevxyz/rn-farcaster-starter) by [Nate](https://warpcast.com/natedevxyz)

### Bots

* [Open source repo](https://github.com/davidfurlong/farcaster-bot-template) to build bots that reply using Neynar webhooks by [David Furlong](https://warpcast.com/df)
* [Follow all bot](https://github.com/wbarobinson/followall) that follows users by [Will Robinson](https://warpcast.com/dangerwillrobin)
* [Frames bot](https://github.com/neynarxyz/farcaster-examples/tree/main/frames-bot) that replies with frames by Neynar

## Frames and Cast actions using Neynar frame validate

### Frames

* [farcards](https://warpcast.com/~/channel/farcards) by [undefined](https://warpcast.com/undefined)

### Cast actions

* [Follower count cast action](https://github.com/neynarxyz/farcaster-examples/tree/main/cast-action) by Neynar
* [Bot or not](https://warpcast.com/~/channel/bot-or-not) by [Angel](https://warpcast.com/sayangel)

## Data science and analytics

* [Neynar tables on Dune](https://dune.com/docs/data-tables/community/neynar/farcaster/) allowing Farcaster queries on Dune dashboards -- sample dashboards by [pixel](https://dune.com/pixelhack/farcaster), [yesyes](https://dune.com/yesyes/farcaster-users-onchain-activities) and [shoni](https://dune.com/alexpaden/farcaster-x-dune)
* [Neynar SQL playground](https://neynar.notion.site/Neynar-Farcaster-SQL-playground-08ca6b55953b4d9386c59a91cb823af5?pvs=4) to query real-time Farcaster protocol data -- sample [dashboard by ghostlinkz](https://data.hubs.neynar.com/public/dashboards/U6aGGq6CQOZXIx6IO71NbaUFDMwX14nYs0OyhT88)

## Tools and debugging

* [ChatGPT Neynar SQL bot](https://warpcast.com/iconia.eth/0x42ad25a9) to write analytics Neynar SQL queries for Farcaster data by [iconia](https://warpcast.com/iconia.eth/0x42ad25a9)
* [ChatGPT Dune SQL bot](https://chat.openai.com/g/g-lKnQHXJKS-dune-x-farcaster-gpt) to write dune queries for Farcaster data by [iconia](https://warpcast.com/iconia.eth)
* [Fario](https://github.com/vrypan/fario) Farcaster command line tools in Python on by [Vrypan](https://warpcast.com/vrypan.eth)
* [CastStorage](https://caststorage.com) to check user storage by [Sam](https://warpcast.com/sammdec.eth)
* [Farcaster Scraper](https://github.com/leo5imon/farcaster-scraper) to fetch, filter, and fine-tune your channel scraping by [Leo Simon](https://warpcast.com/leo5)
* [ChatGPT bot to help write code](https://chat.openai.com/g/g-rSpJCtUwJ-code-caster) using Neynar APIs and Dune by [Emre](https://warpcast.com/ekinci.eth/0xf3b54700)

<Info>
  ### APIs and hosted hubs

  For all the above, you can use APIs and hosted hubs from Neynar

  * [Neynar APIs](/reference/neynar-farcaster-api-overview) for reading and writing Farcaster data (profiles, casts, feed, etc.)
  * [Open source Farcaster channel data](https://github.com/neynarxyz/farcaster-channels/) including Warpcast channels -- community contributed
  * [Neynar hosted hubs](https://neynar.com)
</Info>