Meeting key-value store

Last updated Oct 19, 2026 The RealtimeKit Stores API allows you to create multiple key-value pair realtime stores. Users can subscribe to changes in a store and receive real-time updates. Data is stored until a session is active.

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Create a Store

You can create a realtime store (changes are synced with other users):

To create a store:

const stores = useRealtimeKitSelector((m) => m.stores);
const store = stores.create('myStore');

const store = meeting.stores.create('myStore');

const store = meeting.stores.create('myStore');

val meeting = RealtimeKitMeetingBuilder.build(activity)
val store = meeting.stores.create("myStore")

let meeting = RealtimeKitiOSClientBuilder().build()
let store = meeting.stores.create(name: "myStore")

Note

This method must be executed for every user.

Update a Store

You can add, update or delete entries in a store:

type StoreValue = string | number | object | array;

const stores = useRealtimeKitSelector((m) => m.stores.stores);
const store = stores.get("myStore");

await store.set("user", { name: "John Doe" });

await store.update("user", { age: 34 }); // { name: 'John Doe', age: 34 }

await store.delete("user");

type StoreValue = string | number | object | array;

const { stores } = meeting.stores;
const store = stores.get("myStore");

await store.set("user", { name: "John Doe" });

await store.update("user", { age: 34 }); // { name: 'John Doe', age: 34 }

await store.delete("user");

type StoreValue = string | number | object | array;

const { stores } = meeting.stores;
const store = stores.get("myStore");

await store.set("user", { name: "John Doe" });

await store.update("user", { age: 34 }); // { name: 'John Doe', age: 34 }

await store.delete("user");

val store = meeting.stores.get("myStore")

store.set("user", mapOf("name" to "John Doe"))

let store = meeting.stores.get(name: "myStore")
store.set("user", ["name": "John Doe"])

Note

The set method overwrites the existing value, while the update method updates the existing value.

For example, if the stored value is ['a', 'b'] and you call update with ['c'], the final value will be ['a', 'b', 'c'].

Subscribe to a Store

You can attach event listeners on a store's key, which fire when the value changes.

const stores = useRealtimeKitSelector((m) => m.stores.stores);
const store = stores.get('myStore');
store.subscribe('key', (data) => {
    console.log(data);
});

// subscribe to all keys of a store
store.subscribe('\*', (data) => {
console.log(data);
});

store.unsubscribe('key');

const { stores } = meeting.stores;
const store = stores.get('myStore');
store.subscribe('key', (data) => {
    console.log(data);
});

// subscribe to all keys of a store
store.subscribe('\*', (data) => {
console.log(data);
});

store.unsubscribe('key');

const { stores } = meeting.stores;
const store = stores.get('myStore');
store.subscribe('key', (data) => {
    console.log(data);
});

// subscribe to all keys of a store
store.subscribe('\*', (data) => {
console.log(data);
});

store.unsubscribe('key');

val store = meeting.stores.create("myStore")
val keyChangeCallback = { key: String, value: Any? ->
  println(value)
}
store.subscribe("key", keyChangeCallback)

// Subscribe to all keys
store.subscribe(RtkStore.WILDCARD_KEY) { key, value ->
  println(value)
}

store.unsubscribe("key", keyChangeCallback)

let store = meeting.stores.create(name: "myStore")
let keyChangeCallback: ((String, (Any?)) -> Void) = { key, value in
    print(value ?? "null")
}
store.subscribe(key: "key", onChange: keyChangeCallback)

// Subscribe to all keys
store.subscribe(key: RtkStore.Companion().WILDCARD_KEY) { key, value in
    print(value ?? "null")
}

store.unsubscribe(key: "key", onChange: keyChangeCallback)

Fetch Store Data

You can fetch the data stored in the store:

const stores = useRealtimeKitSelector((m) => m.stores.stores);
const store = stores.get('myStore');

// fetch value for a specific key
const data = store.get('key');

// fetch all the data in the store
const data = store.getAll();

const { stores } = meeting.stores;
const store = stores.get('myStore');

// fetch value for a specific key
const data = store.get('key');

// fetch all the data in the store
const data = store.getAll();

const { stores } = meeting.stores;
const store = stores.get('myStore');

// fetch value for a specific key
const data = store.get('key');

// fetch all the data in the store
const data = store.getAll();

val store = meeting.stores.create("myStore")

// fetch value for a specific key
val data = store.get("key")

// fetch all the data in the store
val data = store.getAll()

let store = meeting.stores.create(name: "myStore")

// fetch value for a specific key
store.get(key: "key")

// fetch all the data in the store
store.getAll()

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description: Send custom broadcast messages to all participants in a RealtimeKit meeting. title: Message broadcast image: https://developers.cloudflare.com/realtime/realtimekit/collaboration/message-broadcast/og.png?v=f55262cc4bd037d0

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