> ## Documentation Index > Fetch the complete documentation index at: https://print.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # Update a project > Changes a project's title or `userData` (your own customer or order details). `userData` is merged one level deep: send `null` for a key to remove it. ## OpenAPI ````yaml openapi.json PATCH /v2/projects/{id} openapi: 3.1.0 info: title: Print.App API version: 2.1.0 description: >- Server-to-server API for Print.App integrations: designs and their page content, folders, files, fonts, palettes, product assignments, projects and editor links. Authenticate every request with a secret key: `Authorization: Bearer sk_…`. Never call it from a browser. servers: - url: https://api.print.app description: Production security: - bearerAuth: [] tags: - name: Account description: The account a secret key belongs to. - name: Designs description: >- The designs (templates) your customers start from: create them at a size, manage their pages, and place text, images and shapes on them. - name: Design folders description: >- Folders that organise your designs. A design can sit in more than one folder. - name: Files description: >- Your own images and graphics, used in designs and offered to customers in the editor. - name: Graphic folders description: >- Folders of files, shown in the editor under Pictures, Backgrounds, Textures or Frames. - name: Fonts description: >- The fonts your designs and customers can use: the built-in set, imported Google fonts and fonts you upload. - name: Palettes description: Colour palettes offered in the editor. - name: Products description: Which designs open for each product (and variant) in your store. - name: Projects description: Your customers' saved designs. - name: Links description: Shareable editor links that open a design or project at create.print.app. paths: /v2/projects/{id}: patch: tags: - Projects summary: Update a project description: >- Changes a project's title or `userData` (your own customer or order details). `userData` is merged one level deep: send `null` for a key to remove it. operationId: updateProject parameters: - name: id in: path required: true schema: type: string description: The `projectId`. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ProjectUpdate' responses: '200': description: OK. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Project' example: object: project id: project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b title: Business Card status: submitted product: id: sku-123 ref: cart-line-7f3a userId: customer-1001 userData: id: customer-1001 name: Jane Doe email: jane@example.com designId: design_01J8Z9K2M3N4P5Q6R7S8T9V0W1 created: '2026-10-17T09:12:03Z' modified: '2026-10-17T09:20:41Z' pages: - index: 0 previewUrl: >- https://d1p81tn8mwpox2.cloudfront.net/?k=s3%3A%2F%2Fapp-print-cdn%2Fcontent_a1.png&size=1000 - index: 1 previewUrl: >- https://d1p81tn8mwpox2.cloudfront.net/?k=s3%3A%2F%2Fapp-print-cdn%2Fcontent_b2.png&size=1000 exports: pdf: >- https://pdf.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b png: >- https://png.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b jpeg: >- https://jpeg.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b tiff: >- https://tiff.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b '400': description: >- A parameter or body field is malformed: `param` names it and `details` lists every problem found. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: invalid_request message: width is required. param: width requestId: FZn-uhymjoEEJow= '401': description: Missing, unknown, revoked or expired secret key. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: unauthorized message: >- Missing or invalid secret key. Send it as "Authorization: Bearer sk_…". requestId: FZn-uhymjoEEJow= '403': description: The account is suspended for an unpaid invoice. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: account_suspended message: >- This account is suspended. Settle the outstanding invoice in the Print.App dashboard. requestId: FZn-uhymjoEEJow= '404': description: >- Not found in your account. Another account's resources answer 404 too. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: not_found message: Not found. requestId: FZn-uhymjoEEJow= '415': description: The body is not JSON. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: unsupported_media_type message: >- Send the request body as JSON, with "Content-Type: application/json". requestId: FZn-uhymjoEEJow= '429': description: >- Rate limited by the API gateway. Back off and retry. This response comes from the gateway, so its body is `{ "message": "Too Many Requests" }`, not the standard error. content: application/json: schema: $ref: '#/components/schemas/GatewayError' example: message: Too Many Requests '500': description: >- Something failed on our side. Retry; quote the requestId to support if it persists. headers: x-request-id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: true code: internal_error message: >- Something went wrong on our side. Retry the request; if it keeps failing, contact support with the requestId. requestId: FZn-uhymjoEEJow= components: schemas: ProjectUpdate: title: ProjectUpdate description: The fields to change. type: object additionalProperties: false minProperties: 1 properties: title: type: string minLength: 1 maxLength: 200 description: The project's name. userData: type: object description: >- Merged into the project's `userData`, one level deep. A key set to `null` is removed. Project: title: Project description: A customer's saved design. type: object required: - object - id - title - status - product - userId - userData - designId - created - modified - pages - exports properties: object: type: string const: project id: type: string description: The `projectId` from the editor's `app:saved` event. title: type: - string - 'null' status: type: string enum: - draft - saved - submitted description: >- `submitted`: the customer finished the design (the editor's submit). `saved`: saved for later. `draft`: autosaved, not yet saved by the customer. product: type: - object - 'null' additionalProperties: true description: >- Exactly the `product` object your page passed to `PrintAppClient` when the project was created — for example `{ id, ref }`. Use it to check the project was made for the product being ordered. It passes through the customer's browser, so treat it as the customer's claim about the page, not as proof. userId: type: - string - 'null' description: The `userId` your page passed to `PrintAppClient`, if any. userData: type: - object - 'null' additionalProperties: true description: >- Customer details attached to the project by a store plugin or your page: `id`, `name`, `email`, `phone`, `info`. properties: id: {} name: type: string firstName: type: string lastName: type: string email: type: string phone: type: string info: type: string designId: type: - string - 'null' description: The design (template) the project was made from. created: type: - string - 'null' format: date-time modified: type: - string - 'null' format: date-time description: Last save. pages: type: array items: type: object required: - index - previewUrl properties: index: type: integer minimum: 0 previewUrl: type: - string - 'null' description: A preview image of the page. exports: type: object required: - pdf - png - jpeg - tiff description: Print files, rendered on request from the project's current state. properties: pdf: type: string png: type: string jpeg: type: string tiff: type: string examples: - object: project id: project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b title: Business Card status: submitted product: id: sku-123 ref: cart-line-7f3a userId: customer-1001 userData: id: customer-1001 name: Jane Doe email: jane@example.com designId: design_01J8Z9K2M3N4P5Q6R7S8T9V0W1 created: '2026-10-17T09:12:03Z' modified: '2026-10-17T09:20:41Z' pages: - index: 0 previewUrl: >- https://d1p81tn8mwpox2.cloudfront.net/?k=s3%3A%2F%2Fapp-print-cdn%2Fcontent_a1.png&size=1000 - index: 1 previewUrl: >- https://d1p81tn8mwpox2.cloudfront.net/?k=s3%3A%2F%2Fapp-print-cdn%2Fcontent_b2.png&size=1000 exports: pdf: https://pdf.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b png: https://png.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b jpeg: >- https://jpeg.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b tiff: >- https://tiff.print.app/project_2b6f1c9e-8d0a-4c3e-9f57-0c1d2e3f4a5b Error: title: Error description: >- Every error the API itself returns. Match on `code`; `message` is for people and may be reworded. type: object required: - error - code - message - requestId properties: error: type: boolean const: true code: type: string enum: - unauthorized - account_suspended - invalid_request - not_found - route_not_found - idempotency_key_reused - idempotency_in_progress - folder_not_empty - builtin_folder - builtin_palette - editor_not_supported - design_changed - payload_too_large - unsupported_media_type - ops_failed - internal_error - service_unavailable description: >- `unauthorized` (401): missing, unknown, revoked or expired secret key. `account_suspended` (403): the account has an unpaid invoice. `invalid_request` (400): a parameter or body field is malformed — see `param` and `details`. `not_found` (404): no such resource in your account. `route_not_found` (404): no such endpoint. `idempotency_key_reused` (409): the Idempotency-Key was used for a different request. `idempotency_in_progress` (409): the first request with that key is still running. `folder_not_empty` (409): the folder still holds designs or folders. `builtin_folder`, `builtin_palette` (409): Print.App's own folders and palettes cannot be changed. `editor_not_supported` (409): page content can only be edited on accounts that use the new editor. `design_changed` (409): the design was saved elsewhere while the batch ran; read it again and retry. `payload_too_large` (413): a body or file over the limit. `unsupported_media_type` (415): send JSON. `ops_failed` (422): an operation in the batch failed, nothing was saved — see `details`. `internal_error` (500): retry; contact support with the `requestId` if it persists. `service_unavailable` (503): retry in a few seconds. message: type: string param: type: string description: The parameter or body field at fault, as a path (`pages[0].title`). details: type: array description: >- Every problem found, when there was more than one (`invalid_request`), or each operation's result (`ops_failed`). items: type: object requestId: type: string description: >- Also sent as the `x-request-id` header. Quote it when contacting support. examples: - error: true code: invalid_request message: limit must be an integer from 1 to 100. param: limit requestId: FZn-uhymjoEEJow= GatewayError: type: object properties: message: type: string description: Returned by the API gateway itself (429). headers: RequestId: description: Identifies the request. Quote it when contacting support. schema: type: string securitySchemes: bearerAuth: type: http scheme: bearer description: >- A secret key from Print.App admin → Domains → Secret keys, sent as `Authorization: Bearer sk_…`. Server-side only. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.