# Create promote URL: https://docs.hanzo.ai/docs/openapi/platform/post-platform-projects-by-project-apps-by-app-promote > Promotes an already-built release to the app. `POST /v1/platform/projects/{project}/apps/{app}/promote` > [Platform →](https://docs.hanzo.ai/docs/openapi/platform) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ------------------------------------------------------------------------ | | **Address** | `https://api.hanzo.ai/v1/platform/projects/{project}/apps/{app}/promote` | | **Method** | `POST` | | **Operation** | `post_platform_projects_by_project_apps_by_app_promote` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Promotes an already-built release to the app. It redeploys an image that already exists — named either by `deploymentId`, which promotes that deployment's exact built image, or by `tag`, resolved the same way a deploy resolves one. One of the two is required; neither is 400. Promotion never builds. A deployment that carries no built image cannot be promoted and is 400, and a deployment id outside this app is 404. It runs through the same deploy core as everything else, so it takes a NEW version number and is subject to the same per-org concurrency cap. Requires a validated principal; 401 without one. ## Request 6 fields, body `application/json` (required). | Field | In | Type | Required | Description | | -------------- | ---- | ------ | -------- | ----------------------------------------------------------------------- | | `project` | path | string | yes | Project is the project the application lives under, from the path. | | `app` | path | string | yes | App is the application's slug, from the path. | | `app` | body | string | — | App is the application's slug, from the path. | | `deploymentId` | body | string | — | DeploymentID promotes that deployment's exact built image. | | `project` | body | string | — | Project is the project the application lives under, from the path. | | `tag` | body | string | — | Tag promotes an image tag, resolved the same way a deploy resolves one. | ## Response | Status | Body | Meaning | | --------- | ----------------------- | -------- | | `202` | platform.deploymentView | accepted | | `default` | problem-details | refused | `202` body — 12 fields. | Field | In | Type | Always | Description | | --------------- | ---- | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `applicationId` | body | string | — | ApplicationID is the app this deployed — the app's `id`, not its slug. | | `buildId` | body | string | — | BuildID is the build record behind a git deploy, whose logs and status live at /v1/platform/builds. | | `commit` | body | string | — | Commit is the git ref this built — the commit a deploy or a push named, else the app's branch. | | `createdAt` | body | integer (int64) | — | CreatedAt is when the attempt was recorded, unix seconds. | | `id` | body | string | — | ID is the deployment's id (`dep_…`), minted when the attempt is recorded. | | `image` | body | string | — | Image is the full `repo:tag` this deployment put in the CR. | | `message` | body | string | — | Message is why this attempt is not live: the failure, or the note that a newer deployment went live before this build finished. | | `org` | body | string | — | Org is the tenant the deployment belongs to, from the validated identity. | | `source` | body | string | — | Source is which lane produced it: `git` (built from the repo) or `image` (an already-built ref deployed as-is, including promote and rollback). | | `status` | body | string | — | Status is where the attempt got to: `building` while its image is being built, `deploying` once its CR reached the cluster — which is the terminal success state, the app's own status is what turns `live` — `error` with the reason in Message, or `superseded` when a newer version went live first. | | `updatedAt` | body | integer (int64) | — | UpdatedAt is its last transition, unix seconds — so for a terminal deployment it is when it reached that state. | | `version` | body | integer (int64) | — | Version counts this app's deployments, from 1 and monotonically. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo platform projects apps promote ``` **SDK** **.ts** ```ts import { Configuration, PlatformApi } from 'hanzoai'; const api = new PlatformApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postPlatformProjectsByProjectAppsByAppPromote({ project: 'project', app: 'app', app: "", deploymentId: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import PlatformApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = PlatformApi(client).post_platform_projects_by_project_apps_by_app_promote(project='project', app='app', app="", deployment_id="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.PlatformAPI.PostPlatformProjectsByProjectAppsByAppPromote(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, platform_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = platform_api::post_platform_projects_by_project_apps_by_app_promote(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.PlatformApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new PlatformApi(client).postPlatformProjectsByProjectAppsByAppPromote(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/platform/projects//apps//promote \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "app": "", "deploymentId": "" }' ``` **MCP** MCP reaches **platform** through the `platform` tool, which names its 38 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them: ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "describe", "arguments": { "op": "get_build" } } }' ``` --- [Platform API](https://docs.hanzo.ai/docs/openapi/platform) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)