> ## Documentation Index > Fetch the complete documentation index at: https://docs.athenahq.ai/llms.txt > Use this file to discover all available pages before exploring further. # Update Pillar > Updates a Knowledge Base pillar's name, description, or status. At least one of the three must be provided; only provided fields change. Renaming returns a 409 when another pillar already uses the name. Status accepts published or archived: archiving hides the pillar from pillar listings and stops its facts feeding content generation, while keeping the facts stored. Requires a website-admin API key. Also available as the MCP tool `update_pillar`. ## OpenAPI ````yaml /api-reference/openapi.json patch /api/v1/knowledge-base/pillars/{pillar_id} openapi: 3.1.0 info: title: AthenaHQ API description: >- AthenaHQ API provides programmatic access to manage your websites and prompts for AI-powered content optimization. version: 1.0.0 contact: email: support@athenahq.ai servers: - url: https://api.athenahq.ai description: Production server security: - apiKey: [] tags: - name: Basics description: Core API operations for managing websites and prompts - name: Metrics description: Metrics and analytics endpoints for tracking AI visibility - name: Billing description: Billing and credits endpoints for managing usage - name: Team Management description: Endpoints for managing team members and invitations - name: Groups description: Endpoints for managing groups of websites - name: Content description: >- Endpoints for accessing Content Hub data — tabs, tracked URLs, and per-URL prompt breakdowns. - name: Pitch Workspace description: >- Endpoints for accessing pitch workspace reports — org-scoped pitch runs with competitors, prompts, attributes, and aggregate metrics. - name: Knowledge Base description: >- Endpoints for reading the brand Knowledge Base — approved brand facts and the pillars that organize them. paths: /api/v1/knowledge-base/pillars/{pillar_id}: patch: tags: - Knowledge Base summary: Update Pillar description: >- Updates a Knowledge Base pillar's name, description, or status. At least one of the three must be provided; only provided fields change. Renaming returns a 409 when another pillar already uses the name. Status accepts published or archived: archiving hides the pillar from pillar listings and stops its facts feeding content generation, while keeping the facts stored. Requires a website-admin API key. Also available as the MCP tool `update_pillar`. operationId: updatePillar parameters: - name: pillar_id in: path required: true schema: type: string format: uuid description: The pillar to update. requestBody: required: true content: application/json: schema: type: object properties: website_id: type: string format: uuid description: The website the pillar belongs to. name: type: string minLength: 1 maxLength: 120 description: New pillar name. description: type: string maxLength: 2000 description: >- New pillar description. An empty string clears the stored description. status: type: string enum: - published - archived description: >- New status. Only published and archived are accepted; the pipeline-internal states (draft, researching) cannot be set over the API. required: - website_id responses: '200': description: The updated pillar plus a pre-update snapshot of the editable fields content: application/json: schema: type: object properties: pillar: type: object properties: id: type: string name: type: string description: type: - string - 'null' status: type: string enum: - researching - published - draft - archived required: - id - name - description - status before: type: object description: Values of the editable fields before this update. properties: name: type: string description: type: - string - 'null' status: type: string enum: - researching - published - draft - archived required: - name - description - status required: - pillar - before '400': description: Bad request - Invalid parameters, or no editable field was provided content: application/json: schema: $ref: '#/components/schemas/Error' examples: empty_edit: value: error: at least one of name, description, or status is required whitespace_name: value: error: name cannot be empty blank_name: value: error: 'name: name must not be empty' '401': description: Unauthorized - Invalid or missing API key content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: >- Forbidden - No admin access to this website, or the Knowledge Base is not enabled for the organization content: application/json: schema: $ref: '#/components/schemas/Error' examples: unauthorized_website: value: error: Unauthorized access to this website kb_not_enabled: value: error: Knowledge Base is not enabled for this organization '404': description: Not found - No pillar with this id on the website content: application/json: schema: $ref: '#/components/schemas/Error' examples: pillar_not_found: value: error: Pillar not found '409': description: Conflict - Another pillar already uses the requested name content: application/json: schema: $ref: '#/components/schemas/Error' examples: name_taken: value: error: A pillar named "Pricing" already exists security: - apiKey: [] components: schemas: Error: type: object description: Error response object required: - error properties: error: type: string description: Error message describing what went wrong example: Unauthorized securitySchemes: apiKey: type: apiKey in: header name: x-api-key description: >- API key for authentication. You can create one [here](https://app.athenahq.ai/organization?tab=api). ````