# Publish project URL: https://docs.hanzo.ai/docs/openapi/project/post-project-by-slug-publish > Promotes a build output into a new release AND goes live with it — create+activate in one call, which is the 99% path. `POST /v1/project/{slug}/publish` > [Project →](https://docs.hanzo.ai/docs/openapi/project) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ------------------------------------------------ | | **Address** | `https://api.hanzo.ai/v1/project/{slug}/publish` | | **Method** | `POST` | | **Operation** | `post_project_by_slug_publish` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Promotes a build output into a new release AND goes live with it — create+activate in one call, which is the 99% path. It is exactly the two halves in sequence with no extra semantics, so the staged flow and the one-shot flow can never drift apart: `source` is promoted under the same org-relative rule and the same guards CreateRelease applies, then the site's pointer is flipped to it, the public host is claimed and the edge is purged. Idempotent on unchanged bytes — same manifest, same release id, no copy, and so nothing more stored. Free, behind the same storage gate. Scope: a validated principal is required (401 without one) and the site is resolved within that principal's org, so another tenant's slug is a 404. ## Request 3 fields, body `application/json` (required). | Field | In | Type | Required | Description | | -------- | ---- | ------ | -------- | --------------------------------------------------------------------------------------------------------------------------- | | `slug` | path | string | yes | Slug is the site to publish, from the path. | | `slug` | body | string | — | Slug is the site to publish, from the path. | | `source` | body | string | — | Source is the build output to promote, as a path RELATIVE to your org's own storage space — never a URL and never a bucket. | ## Response | Status | Body | Meaning | | --------- | ----------------------- | ------- | | `200` | project.projectsRelease | ok | | `default` | problem-details | refused | `200` body — 8 fields. | Field | In | Type | Always | Description | | ----------- | ---- | --------------- | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `active` | body | boolean | — | Active is whether this is the release the site is SERVING right now. | | `bytes` | body | integer (int64) | — | Bytes is their total size in bytes. | | `createdAt` | body | integer (int64) | — | CreatedAt is when the release was cut, as Unix seconds — not when it was last activated. | | `objects` | body | integer (int64) | — | Objects is how many files the release holds. | | `releaseId` | body | string | — | ReleaseID is derived from a DIGEST of the release's own manifest, so identical content is the same release and a release can never be confused with another one. | | `slug` | body | string | — | Slug is the site this release belongs to. | | `source` | body | string | — | Source is what the release was cut from — the build output or upload it was promoted out of. | | `url` | body | string | — | URL is where the site serves. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo project publish ``` **SDK** **.ts** ```ts import { Configuration, ProjectApi } from 'hanzoai'; const api = new ProjectApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postProjectBySlugPublish({ slug: 'slug', slug: "", source: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import ProjectApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = ProjectApi(client).post_project_by_slug_publish(slug='slug', slug="", source="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.ProjectAPI.PostProjectBySlugPublish(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, project_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = project_api::post_project_by_slug_publish(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.ProjectApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new ProjectApi(client).postProjectBySlugPublish(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/project//publish \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "slug": "", "source": "" }' ``` **MCP** Tool `project`, op `post_project_by_slug_publish` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`. ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "project", "arguments": { "op": "post_project_by_slug_publish", "input": { "slug": "", "source": "" } } } }' ``` --- [Project API](https://docs.hanzo.ai/docs/openapi/project) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)