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

> List the attached-data keys a sequence’s people carry, with how many people have a value at each. Use to find what a step variable can be bound to beyond the person columns.

# List the attached-data keys a sequence's people carry



## OpenAPI

````yaml get /sequences/{sequenceId}/data-keys
openapi: 3.1.0
info:
  title: OpenCX API
  description: >

    OpenCX is an AI-powered, all-in-one platform for customer support and
    outbound communications.


    Use this API to manage your OpenCX organization's AI agents, actions,
    conversations, contacts, and more.


    To get started, generate a new API key from the dashboard.


    ## Authentication

    All API endpoints require authentication using a Bearer token. You can
    generate an API key from your OpenCX dashboard.


    ## Rate Limiting

    API requests are rate limited to ensure fair usage. The current limits are:

    - 100 requests per minute for standard endpoints

    - 1000 requests per minute for streaming endpoints


    ## Error Handling

    The API uses standard HTTP status codes and returns detailed error messages
    in the response body.
  version: 1.0-beta
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
  - url: http://localhost:8080
    description: Development
  - url: https://api.open.cx
    description: Production
security:
  - bearerAuth: []
paths:
  /sequences/{sequenceId}/data-keys:
    get:
      summary: List the attached-data keys a sequence's people carry
      description: >-
        Every top-level key of the data attached to enrolled people
        (extra_data), with how many people in a bounded sample have a value at
        it. A key here is usable verbatim as a step variable's source. Read it
        to bind data you did not attach yourself, or to check that the keys you
        attached landed as spelled.
      operationId: listSequenceDataKeys
      parameters:
        - schema:
            type: string
            format: uuid
            pattern: >-
              ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
          in: path
          name: sequenceId
          required: true
          description: The unique identifier of the sequence
      responses:
        '200':
          description: Default Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SequenceDataKeysDto'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorDto'
components:
  schemas:
    SequenceDataKeysDto:
      $schema: https://json-schema.org/draft/2020-12/schema
      $id: '#/components/schemas/SequenceDataKeysDto'
      type: object
      properties:
        sampled:
          type: boolean
          description: True when the sequence holds more people than the sample read.
        sample_size:
          type: integer
          minimum: -9007199254740991
          maximum: 9007199254740991
          description: People the keys were read over (first N by id).
        total:
          type: integer
          minimum: -9007199254740991
          maximum: 9007199254740991
          description: Enrolled people on the sequence.
        keys:
          type: array
          items:
            type: object
            properties:
              key:
                type: string
                description: A top-level attached-data key, usable verbatim as a `source`.
              present:
                type: integer
                minimum: -9007199254740991
                maximum: 9007199254740991
                description: People in the sample with a non-blank value at it.
            required:
              - key
              - present
            additionalProperties: false
          description: Most-covered first, at most 200 — a wider bag is truncated.
      required:
        - sampled
        - sample_size
        - total
        - keys
      additionalProperties: false
    ErrorDto:
      type: object
      properties:
        statusCode:
          type: integer
        message:
          type: string
        error:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

````

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