Environments

Promote an unnamed environment

Changed on Oct 4, 2026

Give an UNNAMED (ad-hoc) environment a name, promoting it IN PLACE — the same environment, now a permanent entry in the project's list, with the same id every existing run still points at.

The ONLY promotion path. PATCH /environments/{environmentId} renames an already-named environment and is admin-gated; this is member-gated and refuses a row that already has a name (409). The platform keeps them apart on purpose: routing promotion through the rename would either open it to members or leave ad-hoc rows unnameable.

Promotion also drops the content fingerprint, because a named environment is mutable: keeping it would let a later identical composition deduplicate onto a row that has since been edited into something else.

post/projects/{projectId}/environments/{environmentId}/name

Request

Base URL
https://app.mcpjam.com/api/v1
URL
https://app.mcpjam.com/api/v1/projects/{projectId}/environments/{environmentId}/name
Auth
HTTP bearer

Path parameters

projectIdstring required

ID of the hosted project that contains the server.

environmentIdstring required

Project environment ID, as returned by the project's environment list.

Request body

expectedRevisioninteger required

The revision you last read. Stale ⇒ 409.

namestring required

Must be unique among the project's live environments.

descriptionstring

Response

The promoted environment.

idstring required

projectIdstring required

namestring required

Unique among the project's live (non-archived) environments.

descriptionstring

hostIdstring required

The host this environment runs against.

serverAttachmentIdstring

Present only when the environment pins a standalone server group; otherwise the host config's own servers apply.

modelIdstring

The environment's model override. ABSENT means the environment INHERITS the model pinned on its host — not that it has no model. Resolve the environment and read effectiveModelId to learn what will actually run. COMPUTED in responses: the selection's modelId when there is one, else the stored bare id. Accepted on writes as a shorthand: send a bare id and the platform converts it (a hosted id becomes a hosted selection, any other a LegacyModelSelection).

modelSelectionOrigin'backfill'

backfill when a conversion (a save of a bare id, or the old-data backfill) chose modelSelection rather than a person. Absent when a person chose it, and on rows with no selection.

pluginVersionIdsstring[]

Pinned plugin VERSION IDs. Narrow by design: the plugin must be installed and enabled, the version must be ready, at most one version per plugin may be pinned, and none of its skills may carry supporting files. Not a general-purpose plugin list.

sandboxImageIdstring

Sandbox-image pin: a project-shared image (see the images endpoints) that eval runs in this environment boot a fresh sandbox from. Absent when unpinned.

revisioninteger required

Optimistic-concurrency counter. Pass this back as expectedRevision on the next write; if it no longer matches, the write is rejected with 409 instead of overwriting a concurrent edit.

archivedboolean required

Archived environments cannot be edited or launched until restored.

archivedAtnumber

Unix epoch milliseconds. Present only when archived.

createdAtnumber required

Unix epoch milliseconds.

updatedAtnumber required