Filament

Filament API

Signature-authenticated REST + WebSocket order-book API for the Filament perpetual DEX on Sei. Place limit/market orders, cancel orders, manage isolated collateral, set TP/SL, read tradable assets with mark/spot/funding, and stream order-book state and order updates over WebSocket. Orders are authenticated by signing the order id with an ethers.js wallet (no API keys).

Documentation GitHub

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AsyncAPI Specification

generated: '2026-07-19'
method: generated
source: https://docs.filament.finance/market-makers/filament-api
note: >-
  Generated faithfully from Filament's documented WebSocket streaming surface. The
  provider publishes no AsyncAPI document; this captures the real WS endpoints and
  subscription topics as an AsyncAPI 3.0 channel map. Message payloads mirror the
  documented REST asset/order/position shapes.
asyncapi: 3.0.0
info:
  title: Filament Orderbook Streaming API
  version: 1.0.0
  description: >-
    Real-time WebSocket streams for the Filament perpetual DEX on Sei: order-book
    state, live asset price feed, and per-account order updates.
servers:
  book:
    host: orderbook.filament.finance
    protocol: wss
    pathname: /sei/api/order-book/book-websocket
    description: Order-book state WebSocket.
  orders:
    host: orderbook.filament.finance
    protocol: wss
    pathname: /sei/api/order-websocket
    description: Order updates WebSocket.
channels:
  orderBookState:
    address: /topic/orderBookState
    servers:
    - $ref: '#/servers/book'
    description: Real-time order-book state (bids/asks) per market.
    messages:
      orderBookState:
        $ref: '#/components/messages/OrderBookState'
  livefeed:
    address: /topic/livefeed
    servers:
    - $ref: '#/servers/book'
    description: Live asset price updates (mark/spot/funding).
    messages:
      assetTick:
        $ref: '#/components/messages/AssetTick'
  orderUpdates:
    address: /topic/order-updates/{account}
    servers:
    - $ref: '#/servers/orders'
    parameters:
      account:
        description: Lowercase wallet address subscribed for order status changes.
    description: Individual order status changes for a subscribed account.
    messages:
      orderUpdate:
        $ref: '#/components/messages/OrderUpdate'
operations:
  receiveOrderBookState:
    action: receive
    channel:
      $ref: '#/channels/orderBookState'
  receiveLivefeed:
    action: receive
    channel:
      $ref: '#/channels/livefeed'
  receiveOrderUpdates:
    action: receive
    channel:
      $ref: '#/channels/orderUpdates'
components:
  messages:
    OrderBookState:
      name: OrderBookState
      summary: Snapshot/delta of order-book bids and asks for a market.
    AssetTick:
      name: AssetTick
      summary: Asset price tick.
      payload:
        type: object
        properties:
          indexToken: {type: string}
          assetName: {type: string}
          markPrice: {type: number}
          spotPrice: {type: number}
          fundingRate: {type: number}
    OrderUpdate:
      name: OrderUpdate
      summary: Status change for one of the subscribed account's orders.