Expo Docs MCP Server

--- title: qr.expo.dev description: Reference for the QR code generator at qr.expo.dev. --- qr.expo.dev is a cloud function that generates Expo-branded QR codes. This function creates QR codes for [EAS Update](/eas-update/introduction/), which are used to preview updates in [development builds](/develop/development-builds/introduction/) and Expo Go. For example, if you and your team have a development build, and you'd like to load the latest update on a specific build's channel, you could go to the following endpoint to generate a QR code: ```text https://qr.expo.dev/eas-update?projectId=your-project-id&runtimeVersion=your-runtime-version&channel=your-channel ``` Which would produce the following QR code SVG: This QR code represents the following URL: ```text exp+your-slug://expo-development-client/?url=https://u.expo.dev/your-project-id?runtime-version=your-runtime-version&channel-name=your-channel ``` This URL will deep link into a development build and instruct it to fetch the latest update on the specified channel. > **info** If sharing the URL is more convenient, you can request the URL directly by adding `format=url` to the query parameters. ## General The following parameters apply to the `/eas-update` endpoint. ### Base query parameters The following base query parameters can be included with any request to `/eas-update`. | Param | Required | Default | Description | | ------------------------ | -------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `slug` | No | exp | Use [`slug`](/versions/latest/config/app/#slug) from [app config](/workflow/configuration/) to target a development build. Otherwise use "exp" to target Expo Go. | | `appScheme` (deprecated) | No | exp | Replaced by `slug`. Use `slug` instead. | | `host` | No | u.expo.dev | The hostname of the server that handles update requests. | | `format` | No | svg | Endpoints respond with SVGs by default. To receive a plain text URL, use `url`. | ### Update by device traits Preview and production builds make requests to the EAS Update service with `runtimeVersion` and `channel` properties. You can emulate this behavior with the following query parameters: | Param | Required | Description | | ---------------- | -------- | ----------------------------------------------------------------- | | `projectId` | Yes | The ID of the project | | `runtimeVersion` | Yes | The [runtime version](/eas-update/runtime-versions/) of the build | | `channel` | Yes | The channel name of the build | #### Example ```text https://qr.expo.dev/eas-update?projectId=your-project-id&runtimeVersion=your-runtime-version&channel=your-channel ``` ### Update by ID You can create a QR code for a specific update given its platform-specific ID. | Param | Required | Description | | ---------- | -------- | -------------------- | | `updateId` | Yes | The ID of the update | #### Example ```text https://qr.expo.dev/eas-update?updateId=your-update-id ``` ### Update by group ID You can create a QR code for an update group given the update's group ID. | Param | Required | Description | | ----------- | -------- | -------------------------- | | `projectId` | Yes | The ID of the project | | `groupId` | Yes | The ID of the update group | #### Example ```text https://qr.expo.dev/eas-update?projectId=your-project-id&groupId=your-update-id ``` ### Update by branch ID You can create a QR code with a branch's ID, which will return the latest update available on that branch. | Param | Required | Description | | ----------- | -------- | --------------------- | | `projectId` | Yes | The ID of the project | | `branchId` | Yes | The ID of the branch | #### Example ```text https://qr.expo.dev/eas-update?projectId=your-project-id&branchId=your-branch-id ``` ### Update by channel ID You can create a QR code with a channel's ID, which will return the latest update available on the branch or branches that are mapped to that channel. | Param | Required | Description | | ----------- | -------- | --------------------- | | `projectId` | Yes | The ID of the project | | `channelId` | Yes | The ID of the channel | #### Example ```text https://qr.expo.dev/eas-update?projectId=your-project-id&channelId=your-channel-id ```