> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcus.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Account attribute updates > > **Endpoint:** `wss://api.testnet.arcus.xyz/v1/ws` — one socket multiplexes every channel and RPC request. Click **Connect**, then send the example subscribe message below to start receiving data. Per-account attribute state, discriminated by entry `type`. `type: "leverage"` entries carry effective leverage per market. `type: "feeTier"` entries carry account-level fee tier state. Snapshot returns one leverage entry per market plus, when available, one fee tier entry. Streaming delivers one entry for each changed attribute. ## AsyncAPI ````yaml api-reference/asyncapi.yaml accountAttributeUpdates id: accountAttributeUpdates title: Account attribute updates description: > > **Endpoint:** `wss://api.testnet.arcus.xyz/v1/ws` — one socket multiplexes every channel and RPC request. Click **Connect**, then send the example subscribe message below to start receiving data. Per-account attribute state, discriminated by entry `type`. `type: "leverage"` entries carry effective leverage per market. `type: "feeTier"` entries carry account-level fee tier state. Snapshot returns one leverage entry per market plus, when available, one fee tier entry. Streaming delivers one entry for each changed attribute. servers: - id: testnet protocol: wss host: api.testnet.arcus.xyz bindings: [] variables: [] - id: mainnet protocol: wss host: api.arcus.xyz bindings: [] variables: [] address: /v1/ws?channel=accountAttributeUpdates parameters: [] bindings: [] operations: - &ref_3 id: subscribeAccountAttributes title: Subscribe account attributes type: receive messages: - &ref_5 id: subscribe contentType: application/json payload: - name: Subscribe to an account channel type: object properties: - name: type type: string description: subscribe required: true - name: channel type: string enumValues: - account - positions - userFills - orders - funding - accountAttributeUpdates required: true - name: id type: string description: Master Ethereum address (0x-prefixed) or core account id. required: true - name: snapshot type: boolean description: >- When false, suppress the initial state snapshot on subscribe and stream only live updates (e.g. userFills, orders). Defaults to true. required: false headers: [] jsonPayloadSchema: type: object required: - type - channel - id properties: type: type: string const: subscribe x-parser-schema-id: channel: type: string enum: - account - positions - userFills - orders - funding - accountAttributeUpdates x-parser-schema-id: id: type: string description: Master Ethereum address (0x-prefixed) or core account id. example: 0xAbCd...1234 x-parser-schema-id: snapshot: type: boolean description: >- When false, suppress the initial state snapshot on subscribe and stream only live updates (e.g. userFills, orders). Defaults to true. default: true x-parser-schema-id: x-parser-schema-id: SubscribeByAddressPayload title: Subscribe to an account channel example: |- { "type": "subscribe", "channel": "account", "id": "0xAbCd...1234" } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribe bindings: [] extensions: &ref_2 - id: x-parser-unique-object-id value: accountAttributeUpdates - &ref_4 id: receiveAccountAttributes title: Receive account attributes type: send messages: - &ref_6 id: snapshot contentType: application/json payload: - allOf: &ref_0 - type: object description: Common envelope for all server-pushed channel messages. required: - type - channel properties: type: type: string enum: - subscribed - channel_data description: >- `subscribed` for the initial snapshot; `channel_data` for updates. x-parser-schema-id: channel: type: string description: Channel name. x-parser-schema-id: id: type: string description: >- Channel id (market or address). Absent for global channels. x-parser-schema-id: contents: type: object additionalProperties: true description: Channel-specific payload. Schema varies by channel. properties: {} x-parser-schema-id: x-parser-schema-id: ChannelDataEnvelope - type: object properties: contents: type: object required: - isSnapshot - entries properties: isSnapshot: type: boolean description: >- True for subscribe-time snapshots; false for streaming deltas. x-parser-schema-id: entries: type: array items: oneOf: - type: object required: - type - marketId - marketDisplayName - leverage properties: type: type: string enum: - leverage description: >- Discriminator for per-market leverage entries. x-parser-schema-id: marketId: type: integer description: >- Market identifier. BTC-USD is `0` and is always present. x-parser-schema-id: marketDisplayName: type: string example: BTC-USD x-parser-schema-id: leverage: type: integer minimum: 1 description: >- Effective leverage (user override or market default). x-parser-schema-id: x-parser-schema-id: AccountAttributesLeverageEntry - type: object required: - type - feeTierLevel - makerFeeBps - takerFeeBps properties: type: type: string enum: - feeTier description: >- Discriminator for account-level fee tier entries. x-parser-schema-id: feeTierLevel: type: integer minimum: 0 description: > Tier level index (0=Base, 1=Bronze, 2=Silver, 3=Gold, 4=Platinum, 5=VIP, 6=Max). Base tier is `0` and is always present. x-parser-schema-id: makerFeeBps: type: integer format: int32 description: >- Maker fee rate in ppm — parts-per-million of notional (e.g. 200 = 0.02% = 2 bps). x-parser-schema-id: takerFeeBps: type: integer format: int32 description: >- Taker fee rate in ppm — parts-per-million of notional (e.g. 500 = 0.05% = 5 bps). x-parser-schema-id: x-parser-schema-id: AccountAttributesFeeTierEntry discriminator: type x-parser-schema-id: AccountAttributesEntry x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: AccountAttributesUpdatePayload name: Account Attributes Snapshot description: >- One leverage entry per market plus, when available, one fee tier entry. Sent once on subscribe. headers: [] jsonPayloadSchema: &ref_1 allOf: *ref_0 x-parser-schema-id: AccountAttributesUpdatePayload title: Account Attributes Snapshot description: >- One leverage entry per market plus, when available, one fee tier entry. Sent once on subscribe. example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: snapshot - &ref_7 id: update contentType: application/json payload: - allOf: *ref_0 x-parser-schema-id: AccountAttributesUpdatePayload name: Account Attributes Update description: Single-entry delta keyed by `type`. headers: [] jsonPayloadSchema: *ref_1 title: Account Attributes Update description: Single-entry delta keyed by `type`. example: '{}' bindings: [] extensions: - id: x-parser-unique-object-id value: update bindings: [] extensions: *ref_2 sendOperations: - *ref_3 receiveOperations: - *ref_4 sendMessages: - *ref_5 receiveMessages: - *ref_6 - *ref_7 extensions: - id: x-parser-unique-object-id value: accountAttributeUpdates securitySchemes: [] ````