> ## 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. # Generate Struct > Generate enrichment field definitions from a natural-language prompt. ## OpenAPI ````yaml https://api.sixtyfour.ai/openapi.json post /struct-builder/generate 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: - ApiKeyAuth: [] - BearerAuth: [] 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. - name: Atlas description: >- Read your Atlas investigations: attribution graph, workspace files, reports, and exports. paths: /struct-builder/generate: post: tags: - StructBuilder summary: Generate Struct description: Generate enrichment field definitions from a natural-language prompt. operationId: generate_struct_struct_builder_generate_post requestBody: content: application/json: schema: $ref: '#/components/schemas/StructBuilderRequest' required: true responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/StructBuilderResponse' '400': description: Request was rejected by the route's validation rules. content: application/json: schema: properties: detail: type: string type: object example: detail: Invalid request body '401': description: Missing or invalid API key. content: application/json: schema: properties: detail: type: string type: object example: detail: Invalid API key '403': description: Organization access is locked. content: application/json: schema: properties: detail: type: string type: object example: detail: >- This organization no longer has access to Sixtyfour. Contact your representative at Sixtyfour. '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: properties: detail: type: string type: object example: detail: Internal server error '503': description: >- The API key could not be checked, or the request could not be started, because a backing service is briefly unavailable or at capacity. Nothing was charged. Retry after the `Retry-After` header. content: application/json: schema: properties: detail: type: string type: object example: detail: Could not verify the API key right now. Retry shortly. components: schemas: StructBuilderRequest: properties: description: type: string maxLength: 4000 minLength: 1 title: Description description: Natural language description of the fields to generate existing_struct: anyOf: - items: $ref: '#/components/schemas/StructField' type: array - type: 'null' title: Existing Struct block_type: anyOf: - type: string enum: - lead_enrichment - company_enrichment - linkedin_enrichment - research_agent - webhook - transform_data - type: 'null' title: Block Type allow_nested: type: boolean title: Allow Nested default: false type: object required: - description title: StructBuilderRequest StructBuilderResponse: properties: struct: items: $ref: '#/components/schemas/StructField' type: array title: Struct type: object required: - struct title: StructBuilderResponse HTTPValidationError: title: HTTPValidationError type: object properties: detail: type: array items: $ref: '#/components/schemas/ValidationError' example: detail: - loc: - body - target_company - domain msg: Field required type: missing input: null ctx: {} StructField: properties: name: type: string maxLength: 100000 pattern: ^[a-zA-Z0-9_]+$ title: Name description: type: string maxLength: 10000 title: Description type: type: string enum: - string - str - int - integer - float - bool - boolean - dict - enum - list[enum] - object - object_list - list - list[str] - list[int] - list[float] - list[bool] title: Type options: anyOf: - items: type: string maxLength: 200 type: array maxItems: 500 - type: 'null' title: Options subfields: anyOf: - items: $ref: '#/components/schemas/StructSubField' type: array - type: 'null' title: Subfields type: object required: - name - description - type title: StructField ValidationError: title: ValidationError type: object required: - loc - msg - type properties: loc: type: array items: oneOf: - type: string - type: integer description: Path to the field that failed validation. example: - body - target_company - domain msg: type: string description: Human-readable error message. example: Field required type: type: string description: Error code (e.g. 'missing', 'value_error'). example: missing input: description: The offending input value (any type, may be null). nullable: true example: null ctx: type: object description: Optional error context. additionalProperties: true example: {} StructSubField: properties: key: type: string maxLength: 100000 pattern: ^[a-zA-Z0-9_]+$ title: Key type: type: string enum: - string - int - float - bool - dict title: Type description: anyOf: - type: string maxLength: 10000 - type: 'null' title: Description type: object required: - key - type title: StructSubField securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: Your Sixtyfour API key. BearerAuth: type: http scheme: bearer description: >- An OAuth access token from `POST /oauth/token`, sent as `Authorization: Bearer `. An API key sent as a bearer token is refused with 401. When both headers are sent, the bearer token is used. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.