> ## 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.

# Screener

> Live cross-instrument screen: per-instrument funding rate, open interest, and the **basis** (mark minus index, in bps). Sort by `funding`, `oi`, or `basis`, and filter by `min_funding`. Computed on demand — Polymarket has no cross-instrument screen.

A cross-instrument screen computed live from current prices. For every instrument it returns the funding rate, open interest, and the **basis** — the mark price minus the index price, both as an absolute number and in basis points (the perp's premium or discount to spot).

Sort by `funding`, `oi`, or `basis` (widest first), and filter with `min_funding` to surface only instruments paying above a threshold. Polymarket returns tickers but offers no way to sort or screen across them — this does it in one call, always on current data.


## OpenAPI

````yaml GET /v3/perps/screener
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/screener:
    get:
      tags:
        - Perps
      summary: Screener
      description: >-
        Live cross-instrument screen: per-instrument funding rate, open
        interest, and the **basis** (mark minus index, in bps). Sort by
        `funding`, `oi`, or `basis`, and filter by `min_funding`. Computed on
        demand — Polymarket has no cross-instrument screen.
      operationId: perps_screener
      parameters:
        - name: sort
          in: query
          required: false
          description: funding | oi | basis
          schema:
            type: string
        - name: min_funding
          in: query
          required: false
          description: Only instruments with funding rate >= this
          schema:
            type: number
      responses:
        '200':
          description: Success
          content:
            application/json:
              example:
                data:
                  - basis: '-0.012000'
                    basis_bps: '-1.77'
                    funding_rate: '0.0000125'
                    index_price: '67.638'
                    instrument_id: 10
                    mark_price: '67.626'
                    open_interest: '485.754'
                    symbol: HYPE-USD
                  - basis: '-20.000000'
                    basis_bps: '-3.19'
                    funding_rate: '0.0000125'
                    index_price: '62781'
                    instrument_id: 6
                    mark_price: '62761'
                    open_interest: '66.53743'
                    symbol: BTC-USD
                  - basis: '0.016000'
                    basis_bps: '2.68'
                    funding_rate: '0.00000625'
                    index_price: '59.602'
                    instrument_id: 5
                    mark_price: '59.618'
                    open_interest: '8641.76'
                    symbol: SILVER-USD
                  - basis: '-0.030000'
                    basis_bps: '-4.07'
                    funding_rate: '0.00000625'
                    index_price: '73.648'
                    instrument_id: 3
                    mark_price: '73.618'
                    open_interest: '3790.472'
                    symbol: WTIOIL-USD
                  - basis: '-3.000000'
                    basis_bps: '-1.02'
                    funding_rate: '0.00000625'
                    index_price: '29515'
                    instrument_id: 4
                    mark_price: '29512'
                    open_interest: '153.1141'
                    symbol: NAS100-USD
                  - basis: '-1.800000'
                    basis_bps: '-2.40'
                    funding_rate: '0.00000625'
                    index_price: '7498.9'
                    instrument_id: 1
                    mark_price: '7497.1'
                    open_interest: '793.42066'
                    symbol: SP500-USD
                  - basis: '-0.020000'
                    basis_bps: '-1.32'
                    funding_rate: '0.00000625'
                    index_price: '151.38'
                    instrument_id: 9
                    mark_price: '151.36'
                    open_interest: '1880.1307'
                    symbol: SPCX-USD
                  - basis: '-1.300000'
                    basis_bps: '-3.16'
                    funding_rate: '0.00000625'
                    index_price: '4116.4'
                    instrument_id: 2
                    mark_price: '4115.1'
                    open_interest: '226.72911'
                    symbol: GOLD-USD
                  - basis: '-0.043000'
                    basis_bps: '-5.52'
                    funding_rate: '-0.00000525'
                    index_price: '77.92'
                    instrument_id: 8
                    mark_price: '77.877'
                    open_interest: '1389.3'
                    symbol: SOL-USD
                  - basis: '-1.000000'
                    basis_bps: '-5.73'
                    funding_rate: '-0.00000623'
                    index_price: '1746.7'
                    instrument_id: 7
                    mark_price: '1745.7'
                    open_interest: '2357.9583'
                    symbol: ETH-USD
components:
  securitySchemes:
    api_key:
      type: apiKey
      in: header
      name: x-api-key

````