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

# List Available Blocks

> List all workflow block types with their input specs schemas.



## OpenAPI

````yaml https://api.sixtyfour.ai/openapi.json get /workflows/blocks
openapi: 3.1.0
info:
  title: Sixtyfour API
  description: >-
    Intelligence API for People and Entities. Deploy AI agents that investigate,
    resolve identities, map relationships, and surface risk signals
  contact:
    name: Sixtyfour
    url: https://sixtyfour.ai/
    email: support@sixtyfour.ai
  license:
    name: Proprietary
  version: 1.0.0
servers:
  - url: https://api.sixtyfour.ai
    description: Production
security: []
tags:
  - name: Enrichment
    description: Find and enrich emails, phones, and LinkedIn for people and companies.
  - name: org-chart
    description: Discover people inside a company and build org charts.
  - name: Search
    description: Run deep and filter searches over Sixtyfour's data.
  - name: Workflow
    description: Create, run, and manage enrichment workflows.
  - name: Workflow Schedules
    description: Create and manage recurring schedules for workflows.
  - name: Account
    description: Manage and inspect your account and credit balance.
  - name: Intelligence
    description: Verify identity attributes such as age using high-tier OSINT research.
paths:
  /workflows/blocks:
    get:
      tags:
        - Workflow
      summary: List Available Blocks
      description: List all workflow block types with their input specs schemas.
      operationId: get_available_blocks_workflows_blocks_get
      parameters:
        - name: x-api-key
          in: header
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            title: X-Api-Key
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/BlockInfoResponse'
                title: Response Get Available Blocks Workflows Blocks Get
        '400':
          description: Request was rejected by the route's validation rules.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: Invalid request body
        '401':
          description: Missing or invalid API key.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: Invalid API key
        '403':
          description: Caller does not have access to this workflow.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: Access denied
        '404':
          description: Workflow, run, or job not found.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: Workflow not found
        '409':
          description: Workflow with the supplied ID already exists.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: >-
                  Workflow with ID 0123abcd-1234-5678-9abc-def012345678 already
                  exists. Use update endpoint to modify existing workflows.
        '422':
          description: Request body failed validation.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
        '500':
          description: Unexpected server error. Retry with backoff.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
              example:
                detail: Internal server error
components:
  schemas:
    BlockInfoResponse:
      properties:
        block_name:
          type: string
          title: Block Name
          description: Registered block type name (e.g. 'enrich_lead', 'find_email').
        specs_schema:
          additionalProperties: true
          type: object
          title: Specs Schema
          description: JSON Schema describing the block's `specs` payload.
      type: object
      required:
        - block_name
        - specs_schema
      title: BlockInfoResponse
      description: Response for block info documentation endpoint.
    HTTPValidationError:
      title: HTTPValidationError
      type: object
      properties:
        detail:
          type: array
          items:
            $ref: '#/components/schemas/ValidationError'
      example:
        detail:
          - loc:
              - body
              - target_company
              - domain
            msg: Field required
            type: missing
            input: null
            ctx: {}
    ValidationError:
      title: ValidationError
      type: object
      required:
        - loc
        - msg
        - type
      properties:
        loc:
          type: array
          items:
            oneOf:
              - type: string
              - type: integer
          description: Path to the field that failed validation.
          example:
            - body
            - target_company
            - domain
        msg:
          type: string
          description: Human-readable error message.
          example: Field required
        type:
          type: string
          description: Error code (e.g. 'missing', 'value_error').
          example: missing
        input:
          description: The offending input value (any type, may be null).
          nullable: true
          example: null
        ctx:
          type: object
          description: Optional error context.
          additionalProperties: true
          example: {}

````