> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polynode.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Tickers

> Live prices, open interest and funding for one instrument. `index_price` is the real underlying asset price.

| Field           | Meaning                                           |
| --------------- | ------------------------------------------------- |
| `index_price`   | External reference price of the underlying        |
| `mark_price`    | Exchange mark used for margining and liquidations |
| `last_price`    | Price of the most recent trade                    |
| `mid_price`     | Orderbook midpoint                                |
| `open_interest` | Open contracts (base-asset units)                 |
| `funding_rate`  | Current hourly funding rate                       |
| `next_funding`  | When the next funding payment occurs (ms)         |

Tickers update continuously; for sub-second consumption use the [`perps_tickers` WebSocket channel](/perps/websocket/channels).

Omit the instrument — `GET /v3/perps/tickers` — to get every instrument's ticker in one call, wrapped as `{"data": [...]}`.


## OpenAPI

````yaml GET /v3/perps/tickers/{instrument}
openapi: 3.1.0
info:
  title: PolyNode API
  description: >-
    Real-time Polymarket data API with decoded mempool settlements, OHLCV
    candles, and full Polygon JSON-RPC proxy.
  contact:
    name: PolyNode
    url: https://polynode.dev
  license:
    name: ''
  version: 2.0.0
servers:
  - url: https://api.polynode.dev
    description: Production
security:
  - api_key: []
paths:
  /v3/perps/tickers/{instrument}:
    get:
      tags:
        - Perps
      summary: Ticker
      description: >-
        Live prices, open interest and funding for one instrument. `index_price`
        is the real underlying asset price.
      operationId: perps_ticker
      parameters:
        - name: instrument
          in: path
          required: true
          description: Instrument id (e.g. `6`), symbol (`BTC-USD`), or bare asset (`btc`).
          schema:
            type: string
      responses:
        '200':
          description: Success
          content:
            application/json:
              example:
                funding_rate: '0.0000125'
                index_price: '62752'
                instrument_id: 6
                last_price: '62772'
                mark_price: '62739'
                mid_price: '62738'
                next_funding: 1783598400000
                open_interest: '66.67903'
                symbol: BTC-USD
                timestamp: 1783598395354
components:
  securitySchemes:
    api_key:
      type: apiKey
      in: header
      name: x-api-key

````