Type-safe APIs with Protobuf and TypeScript.
npm install @connectrpc/connectConnect is a family of libraries for building type-safe APIs with different languages and platforms.
@connectrpc/connect brings them to TypeScript,
web browsers, and Node.js.
With Connect, you define your schema first:
``proto`
service ElizaService {
rpc Say(SayRequest) returns (SayResponse) {}
}
And with the magic of code generation, this schema produces servers and clients:
`ts`
const answer = await eliza.say({ sentence: "I feel happy." });
console.log(answer);
// {sentence: 'When you feel happy, what do you do?'}
Unlike REST, the RPCs you use with Connect are typesafe end to end, but they are
regular HTTP under the hood. You can see all requests in the network inspector,
and you can curl them if you want:
`shell`
curl \
--header 'Content-Type: application/json' \
--data '{"sentence": "I feel happy."}' \
https://demo.connectrpc.com/connectrpc.eliza.v1.ElizaService/Say
With Connect for ECMAScript, you can spin up a service in Node.js and call it
from the web, the terminal, or native mobile clients. Under the hood, it uses
Protocol Buffers for the schema, and
implements RPC (remote procedure calls) with three protocols: The widely available
gRPC and gRPC-web, and Connect's own protocol,
optimized for the web. This gives you unparalleled interoperability with
full-stack type safety.
Follow our 10-minute tutorial where
we use Vite and React to create a
web interface for ELIZA.
React, Svelte, Vue, Next.js and Angular are supported (see examples),
and we have an expansion pack for TanStack Query.
We support all modern web browsers that implement the widely available
fetch API
and the Encoding API.
Follow our 10-minute tutorial
to spin up a service in Node.js, and call it from the web, and from a gRPC client
in your terminal.
You can use vanilla Node.js, or our server plugins for Fastify
or Express. We support the builtin http, and http2`
modules on Node.js v18.14.1 and later.