Many developers don’t need the power of a full hub — their applications may only use a small amount of the hub’s resources. A paid service that allows developers to share the cost of running a hub and avoid the hassle of setting up infrastructure would be very useful for the network.
Warpcast maintains REST API’s which proxy messages to Hubs, which it intends to shutdown in a year in favor of focussing on Hubs. Developers often want the convenience of simple API’s and there’s an opportunity to rebuild this for the ecosystem. A paid service could also go beyond the simple features of the Warpcast API offering webhooks for certain events, graph-ql like querying and other such features.
An Etherscan-like website for Farcaster Hubs that has features useful for developers like viewing raw message content, estimating the time to propagate messages across hubs, validating messages in JSON format, and displaying stats about the geographic distribution of hubs.
A golang library for interacting with Hubs, similar to hub-nodejs.
A python library for interacting with Hubs, similar to hub-nodejs.