Neynar developer ecosystem for Farcaster

Tools below can help you build on Farcaster more easily

Libraries and SDKs

@neynar/nodejs-sdk by Neynar (official library)
@neynar/react-native-signin by Neynar (official library)
farcaster-js library for Neynar by Standard Crypto
Next-js library for Neynar by Alex Grover
GoLang signer generation library for Neynar by Gallery
SDK to build on React Native, fetch feed with Neynar APIs by Cameron Voell
farcaster-py library for using Neynar Hubs by vrypan.eth

Open source clients and bots using Neynar Hubs and APIs

Web

Mobile

Bots

Follow all bot that follows users by Will Robinson
Frames bot that replies with frames by Neynar

Frames and Cast actions using Neynar frame validate

Frames

farcards by undefined

Cast actions

Follower count cast action by Neynar
Bot or not by Angel

Data science and analytics

Neynar tables on Dune allowing Farcaster queries on Dune dashboards -- sample dashboards by pixel, yesyes and shoni
Neynar SQL playground to query real-time Farcaster protocol data -- sample dashboard by ghostlinkz

Tools and debugging

Vasco Neynar and Warpcast debugging tools by Pedro
ChatGPT Neynar SQL bot to write analytics Neynar SQL queries for Farcaster data by iconia
ChatGPT Dune SQL bot to write dune queries for Farcaster data by iconia
Fario Farcaster command line tools in Python on by Vrypan
MFSA simple bot builder by borodutch
CastStorage to check user storage by Sam
Farcaster Scraper to fetch, filter, and fine-tune your channel scraping by Leo Simon
ChatGPT bot to help write code using Neynar APIs and Dune by Emre

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

Neynar APIs for reading and writing Farcaster data (profiles, casts, feed, etc.)

Open source Farcaster channel data including Warpcast channels -- community contributed

Neynar hosted hubs