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

# List series

> Every recurring market — a series opens a new window on a fixed schedule (`sol-15m`: every 15 minutes) — with its settlement rule, price grid and fees.



## OpenAPI

````yaml api-reference/openapi.json GET /series
openapi: 3.1.0
info:
  title: updown Trade API
  version: 1.0.0
  description: >-
    Public REST API. Market data needs no key; `/account` (and order entry, when
    it ships) takes an API key. Prices are dollar strings on the 1¢ grid, counts
    are contract strings, times are epoch ms. Generated from packages/protocol —
    do not edit by hand.
servers:
  - url: https://api.updown.fast/trade-api/v1
    description: production
security: []
paths:
  /series:
    get:
      summary: List series
      description: >-
        Every recurring market — a series opens a new window on a fixed schedule
        (`sol-15m`: every 15 minutes) — with its settlement rule, price grid and
        fees.
      operationId: listSeries
      responses:
        '200':
          description: Every series.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SeriesListResponse'
        '400':
          description: Invalid request (code BAD_REQUEST).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited (code RATE_LIMITED); wait `Retry-After` seconds.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: The book could not be read (code EXCHANGE_UNAVAILABLE); retry.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security: []
components:
  schemas:
    SeriesListResponse:
      type: object
      properties:
        series:
          type: array
          items:
            type: object
            properties:
              ticker:
                type: string
                pattern: ^[a-z0-9][a-z0-9-]{0,63}$
                description: Series ticker, e.g. "btc-15m".
              title:
                type: string
              category:
                type: string
                enum:
                  - crypto
                  - stocks
              underlying:
                type: string
              interval_minutes:
                type: integer
                exclusiveMinimum: 0
                maximum: 9007199254740991
              settlement_source:
                type: string
                enum:
                  - coinbase
                  - pyth
                  - robinhood-chain
              contract_terms:
                type: string
              price_ranges:
                type: array
                items:
                  type: object
                  properties:
                    start:
                      type: string
                      pattern: ^0\.(0[1-9]|[1-9]\d)$
                      description: >-
                        Contract price in dollars, "0.01"–"0.99" (v1: whole
                        cents).
                    end:
                      type: string
                      pattern: ^0\.(0[1-9]|[1-9]\d)$
                      description: >-
                        Contract price in dollars, "0.01"–"0.99" (v1: whole
                        cents).
                    step:
                      type: string
                  required:
                    - start
                    - end
                    - step
                  additionalProperties: false
              tick_size:
                type: string
              fee_schedule:
                type: object
                properties:
                  maker:
                    type: string
                  taker:
                    type: string
                required:
                  - maker
                  - taker
                additionalProperties: false
            required:
              - ticker
              - title
              - category
              - underlying
              - interval_minutes
              - settlement_source
              - contract_terms
              - price_ranges
              - tick_size
              - fee_schedule
            additionalProperties: false
      required:
        - series
      additionalProperties: false
    Error:
      type: object
      properties:
        code:
          type: string
          enum:
            - BAD_REQUEST
            - NOT_FOUND
            - SERIES_NOT_FOUND
            - MARKET_NOT_FOUND
            - METHOD_NOT_ALLOWED
            - RATE_LIMITED
            - UNAUTHORIZED
            - INTERNAL_ERROR
            - EXCHANGE_UNAVAILABLE
        message:
          type: string
        details:
          type: string
      required:
        - code
        - message
      additionalProperties: false

````

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