> ## Documentation Index > Fetch the complete documentation index at: https://docs.trackup.me/llms.txt > Use this file to discover all available pages before exploring further. # Create a builder page from catalog blocks > Requires page.create. Creates a builder page (editable later in the Trackup builder) from blocks of listPageBlocks; it is a draft until publishPage. page: { title, description?, basedOnPreset?, theme?: { primary: "#RRGGBB", accent?, mode: "light" | "dark" }, blocks: [{ type, overrides?: { fields?: { "": "text" }, items?: [{ "": "text" }] } }] }. Field paths and item keys come from the block in listPageBlocks; texts longer than a field max are cut. A preset supplies its sections and a block of the same type replaces the preset one. Content that cannot be placed is listed in warnings. ## OpenAPI ````yaml https://api.trackup.me/openapi.json post /v1/projects/{id}/pages/compose openapi: 3.1.0 info: title: Trackup API description: >- API-key-accessible Trackup operations. Send your key in the `X-Api-Key` header. Keys belong to a team. `X-Team-Id` is not required; if supplied, it must match that team. Each operation lists its required key permission. The key creator must remain a team member and normally hold that permission. The ingest-only permissions `visitor.create`, `conversion.create`, and `request.create` do not need to be held by the creator. Project access and selection are described per operation. Session-only account, administration and OAuth operations are not part of this reference. The same operations are available as MCP tools at `/mcp` (Streamable HTTP). Authenticate with `X-Api-Key` or connect through OAuth, which issues an API key on consent. Schema validation errors return HTTP 422 with an `errors` object. Other errors generally contain `error` and `message`; operation-specific responses describe exceptions. version: 1.0.0 servers: - url: / description: Current API environment security: - ApiKey: [] paths: /v1/projects/{id}/pages/compose: post: tags: - Pages summary: Create a builder page from catalog blocks description: >- Requires page.create. Creates a builder page (editable later in the Trackup builder) from blocks of listPageBlocks; it is a draft until publishPage. page: { title, description?, basedOnPreset?, theme?: { primary: "#RRGGBB", accent?, mode: "light" | "dark" }, blocks: [{ type, overrides?: { fields?: { "": "text" }, items?: [{ "": "text" }] } }] }. Field paths and item keys come from the block in listPageBlocks; texts longer than a field max are cut. A preset supplies its sections and a block of the same type replaces the preset one. Content that cannot be placed is listed in warnings. operationId: composeBuilderPage parameters: - in: path name: id schema: type: string format: uuid required: true requestBody: required: true content: application/json: schema: type: object properties: name: type: string minLength: 1 maxLength: 255 purpose: type: string enum: - landing - checkout default: landing pathname: type: string pattern: ^\/?[a-zA-Z0-9\-._~/]+$ minLength: 1 maxLength: 1024 salesPlatformId: type: string format: uuid page: type: object properties: title: type: string minLength: 1 maxLength: 120 description: type: string maxLength: 300 basedOnPreset: type: string theme: type: object properties: primary: type: string pattern: ^#[0-9a-fA-F]{6}$ accent: type: string pattern: ^#[0-9a-fA-F]{6}$ mode: type: string enum: - light - dark default: light required: - primary additionalProperties: false blocks: type: array items: type: object properties: type: type: string overrides: type: object properties: fields: type: object additionalProperties: type: string items: type: array items: type: object additionalProperties: type: string maxItems: 16 additionalProperties: false required: - type additionalProperties: false minItems: 0 maxItems: 14 required: - title - blocks additionalProperties: false required: - name - page responses: '201': description: Created page and compile warnings. content: application/json: schema: $ref: '#/components/schemas/ComposedBuilderPage' '400': description: Malformed request or an invalid operation. content: application/json: schema: $ref: '#/components/schemas/ApiError' '401': description: The X-Api-Key header is missing or the API key is invalid. content: application/json: schema: $ref: '#/components/schemas/ApiError' '403': description: >- The key is expired, revoked, lacks permission, or its creator no longer has the required team access. A conflicting X-Team-Id is also rejected. content: application/json: schema: $ref: '#/components/schemas/ApiError' '404': description: >- The requested resource was not found or is outside the permitted scope. content: application/json: schema: $ref: '#/components/schemas/ApiError' '409': description: The operation conflicts with existing data. content: application/json: schema: $ref: '#/components/schemas/ApiError' '422': description: >- Invalid input. Each field path maps to its first validation message; _form identifies an object-level error. content: application/json: schema: $ref: '#/components/schemas/ValidationError' '500': description: An unexpected error occurred. content: application/json: schema: $ref: '#/components/schemas/ApiError' components: schemas: ComposedBuilderPage: type: object properties: page: $ref: '#/components/schemas/CreatedPage' warnings: type: array items: type: string required: - page - warnings ApiError: type: object properties: error: type: string message: type: string required: - error - message additionalProperties: true ValidationError: type: object properties: errors: type: object additionalProperties: type: string required: - errors CreatedPage: type: object properties: id: type: string format: uuid projectId: type: string format: uuid name: type: string type: type: string enum: - redirect - builder - html createdAt: type: string format: date-time link: $ref: '#/components/schemas/PageLink' required: - id - projectId - name - type - createdAt - link example: id: 33333333-3333-4333-8333-333333333333 name: Autumn offer type: redirect createdAt: '2026-10-26T12:00:00.000Z' projectId: 11111111-1111-4111-8111-111111111111 link: id: 99999999-9999-4999-8999-999999999999 name: Autumn offer pathname: /autumn-offer type: generic urls: - id: aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa pageId: 33333333-3333-4333-8333-333333333333 salesPlatformId: null name: Autumn offer weight: 1 isActive: true PageLink: type: object properties: id: type: string format: uuid name: type: string pathname: type: string type: type: string enum: - generic - traffic_source - sales_platform urls: type: array items: $ref: '#/components/schemas/UrlVariant' required: - id - name - pathname - type - urls example: id: 99999999-9999-4999-8999-999999999999 name: Autumn offer pathname: /autumn-offer type: generic urls: - id: aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa pageId: 33333333-3333-4333-8333-333333333333 salesPlatformId: null name: Autumn offer weight: 1 isActive: true UrlVariant: type: object properties: id: type: string format: uuid pageId: type: string format: uuid salesPlatformId: type: - string - 'null' format: uuid name: type: string weight: type: number isActive: type: boolean required: - id - pageId - salesPlatformId - name - weight - isActive example: id: 55555555-5555-4555-8555-555555555555 pageId: 33333333-3333-4333-8333-333333333333 salesPlatformId: null name: Landing A weight: 50 isActive: true securitySchemes: ApiKey: type: apiKey in: header name: X-Api-Key ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.