The substrate-api-client is a Rust-library for connecting to a substrate-based node via RPC. It is an alternative to subxt, which provides a similar functionality. RPC clients are needed in any software component, connecting to a substrate parachain. Therefore it is advisable, that there is more than one client available for Rust developers. Apart from that, the substrate-api-client fills a gap, providing the possibility to create extrinsics in a no_std-environment. Thereby facilitating extrinsic creation from within trusted hardware (like Intel sgx). This has a big potential for further usage in IoT environments. Last but not least, the substrate-api-client has an easy-to-use interface and comes with many practical examples, which makes it a good option for new developers.

This proposal aims to fund:

1. maintenance and support for the substrate api client over 3 months (Nov-22 until Jan-23).

2. evaluation and design of two new features:

   • CLI-wallet implementation
   • full no_std-compatibility

See the discussion and our full proposal for the details.