Moss - Real-time Semantic Search for Conversational AI

Browser SDK / Browser vs Node Moss ships two JavaScript clients. They share a similar API surface but target different environments. Pick the one that matches where your code runs.

Which one do I use?

Use @moss-dev/moss-web for client-side, in-browser search. Queries run locally on WebAssembly, so once an index is loaded there are no server round-trips and no data leaves the device.
Use @moss-dev/moss for server-side (Node.js) workloads, such as API routes, backend services, and pipelines.

// In the browser
import { MossClient } from "@moss-dev/moss-web";

// On the server (Node.js)
import { MossClient } from "@moss-dev/moss";

Differences

	`@moss-dev/moss-web` (Browser)	`@moss-dev/moss` (Node)
Environment	Modern browsers, runs on WebAssembly	Node.js server-side
Where queries run	Locally in the browser after `loadIndex`	Server-side runtime
Sessions	Not supported	Supported (`client.session()`)
Persistence	In-browser, per device	Server-side
Credentials	Use a custom authenticator; never ship a `projectKey` in client code	`projectKey` can be used directly in trusted server code

Both clients require an index to be loaded before querying. In the browser SDK, call loadIndex before query.

Overview MossClient

⌘I

Python

JavaScript

Swift (iOS)

Elixir

Browser

C

Browser vs Node

Which one do I use?

Differences

​Which one do I use?

​Differences

Which one do I use?

Differences