> ## Documentation Index > Fetch the complete documentation index at: https://docs.gc.ai/llms.txt > Use this file to discover all available pages before exploring further. # Materialize an API Chat > Surface an API-created chat into chat history and return a shareable deep link. Chats created through `POST /chat/completions` stay out of chat history (both the GC AI web app and [chat search](/api-reference/search-chats)) until you materialize them. Use the `chat_id` from a completed completion response. The endpoint is idempotent. Calling it again on an already-materialized chat returns the same link without side effects. **Authorization:** User-scoped keys can only materialize chats they created. Organization-scoped keys can only materialize chats created by other organization-scoped keys. See [Chat Visibility](/api-reference/concepts/chat-visibility) for how this works. ## OpenAPI ````yaml POST /chat/{id}/materialize openapi: 3.0.3 info: title: GC AI External API version: 1.0.0 description: >- The GC AI External API allows programmatic access to GC AI's chat capabilities. It's designed for integration with workflow automation tools like Zapier, Make, n8n, or custom applications. ## Authentication All API requests must include an API key in the `Authorization` header: ``` Authorization: gcai_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ``` API keys can be created in the GC AI app under **Settings → API**. ## Current Limitations The API is optimized for single-turn completions. The following are not yet available via API: - **Multi-turn conversations**: each request is independent - **Interactive clarification**: the model cannot pause to ask the caller a follow-up question; the `askUserQuestions` tool is disabled on the API surface in beta ## Usage Usage is tracked and viewable in the GC AI app under **Settings → API → View Usage**. ## Support For API support, contact [support@gc.ai](mailto:support@gc.ai) or reach out to your account representative. contact: email: support@gc.ai servers: - url: https://app.gc.ai/api/external/v1 description: Production server security: [] tags: - name: Chat description: AI chat completion endpoints - name: Files description: File upload and management endpoints - name: Folders description: Folder management endpoints - name: Playbooks description: Playbook review endpoints - name: Projects description: Project management endpoints - name: Utility description: Health check and connectivity endpoints paths: /chat/{id}/materialize: post: tags: - Chat summary: Materialize an API chat description: >- Surface an API-created chat into chat history and return a shareable deep link. Chats created through `POST /chat/completions` stay out of chat history (both the GC AI web app and [chat search](/api-reference/search-chats)) until you materialize them. Use the `chat_id` from a completed completion response. The endpoint is idempotent. Calling it again on an already-materialized chat returns the same link without side effects. **Authorization:** User-scoped keys can only materialize chats they created. Organization-scoped keys can only materialize chats created by other organization-scoped keys. See [Chat Visibility](/api-reference/concepts/chat-visibility) for how this works. operationId: materializeChat parameters: - schema: type: string format: uuid description: The chat ID required: true description: The chat ID name: id in: path responses: '200': description: Chat materialized (or already materialized) content: application/json: schema: $ref: '#/components/schemas/MaterializeChatResponse' '400': description: Invalid chat ID content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Missing or malformed API key content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Token cannot materialize this chat (wrong ownership scope) content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Chat not found content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: Chat is not an API-created chat content: application/json: schema: $ref: '#/components/schemas/Error' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' '503': description: Service temporarily unavailable headers: Retry-After: schema: type: string description: >- Seconds to wait before retrying after a transient service outage. example: '5' required: true description: >- Seconds to wait before retrying after a transient service outage. content: application/json: schema: $ref: '#/components/schemas/Error' security: - ApiKeyAuth: [] components: schemas: MaterializeChatResponse: type: object properties: id: type: string format: uuid description: The chat ID title: type: string nullable: true description: The chat title, if generated chat_url: type: string format: uri description: Deep link to open the chat in the GC AI web UI materialized_at: type: string format: date-time description: When the chat was materialized required: - id - title - chat_url - materialized_at Error: type: object properties: error: type: string description: Error message message: type: string description: Additional error details details: type: object additionalProperties: nullable: true description: Validation error details (for 400 errors) required: - error securitySchemes: ApiKeyAuth: type: apiKey in: header name: Authorization description: |- API key for authentication. Format: `gcai_xxxxxxxxx` Create API keys in the GC AI app under Settings → API. ````