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

# Trader-volume concentration for a builder

> How much of the builder's window volume is concentrated in its top traders. Returns total volume + total trader count + top-1/10/100/1k/10k volume and share.



## OpenAPI

````yaml https://api.struct.to/openapi.json get /polymarket/builders/{builder_code}/concentration
openapi: 3.1.0
info:
  title: Polymarket API
  description: >-
    RESTful API for querying Polymarket prediction markets data including
    events, markets, traders, holders, and real-time metrics
  license:
    name: ''
  version: 1.0.0
servers:
  - url: https://api.struct.to/v1
security: []
paths:
  /polymarket/builders/{builder_code}/concentration:
    get:
      tags:
        - Builders
      summary: Trader-volume concentration for a builder
      description: >-
        How much of the builder's window volume is concentrated in its top
        traders. Returns total volume + total trader count + top-1/10/100/1k/10k
        volume and share.
      operationId: get_builder_concentration
      parameters:
        - name: builder_code
          in: path
          description: Builder code.
          required: true
          schema:
            type: string
        - name: timeframe
          in: query
          description: 'Window: lifetime, 1d (24h), 7d, 30d (1mo). Default: 1d'
          required: false
          schema:
            $ref: '#/components/schemas/BuilderTimeframe'
      responses:
        '200':
          description: Concentration metrics
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConcentrationResponse'
components:
  schemas:
    BuilderTimeframe:
      type: string
      description: Time window for cumulative builder stats.
      enum:
        - lifetime
        - 1d
        - 7d
        - 30d
    ConcentrationResponse:
      type: object
      required:
        - builder_code
        - total_volume_usd
        - total_traders
        - top1_volume_usd
        - top10_volume_usd
        - top100_volume_usd
        - top1k_volume_usd
        - top10k_volume_usd
        - top1_share
        - top10_share
        - top100_share
        - top1k_share
        - top10k_share
      properties:
        builder_code:
          type: string
          description: >-
            The builder this response is about. Always populated, even when the

            builder has no activity in the window (the rest of the fields are
            0).
        total_volume_usd:
          type: number
          format: double
          description: Total volume in the window across every trader of this builder.
        total_traders:
          type: integer
          format: int64
          description: Total traders that routed through this builder in the window.
        top1_volume_usd:
          type: number
          format: double
          description: Volume routed by the single biggest trader.
        top10_volume_usd:
          type: number
          format: double
          description: Volume routed by the top-10 traders.
        top100_volume_usd:
          type: number
          format: double
          description: Volume routed by the top-100 traders.
        top1k_volume_usd:
          type: number
          format: double
          description: Volume routed by the top-1k traders.
        top10k_volume_usd:
          type: number
          format: double
          description: Volume routed by the top-10k traders.
        top1_share:
          type: number
          format: double
          description: >-
            Top-1 share — fraction of total volume held by the single biggest
            trader.
        top10_share:
          type: number
          format: double
          description: Top-10 share.
        top100_share:
          type: number
          format: double
          description: Top-100 share.
        top1k_share:
          type: number
          format: double
          description: Top-1k share.
        top10k_share:
          type: number
          format: double
          description: Top-10k share.

````