> ## Documentation Index
> Fetch the complete documentation index at: https://docs.runaether.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Enable an MCP server on a project

> Enables the server, or changes its credential policy. The policy is null for a server that needs no credential; the org policy is refused until org-owned connections exist.



## OpenAPI

````yaml api-reference/openapi.v1.json PUT /projects/{id}/mcp-servers/{mcpServerID}
openapi: 3.1.0
info:
  title: Aether Public API
  version: 0.1.0
  description: >-
    The versioned, public Aether REST API. Authenticate with an `aether_`
    platform API key or a session token.
servers:
  - url: https://api.runaether.dev/v1
security:
  - bearerAuth: []
paths:
  /projects/{id}/mcp-servers/{mcpServerID}:
    put:
      tags:
        - mcp-servers
      summary: Enable an MCP server on a project
      description: >-
        Enables the server, or changes its credential policy. The policy is null
        for a server that needs no credential; the org policy is refused until
        org-owned connections exist.
      operationId: enableProjectMcpServer
      parameters:
        - in: path
          name: id
          required: true
          schema:
            format: uuid
            type: string
        - in: path
          name: mcpServerID
          required: true
          schema:
            format: uuid
            type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EnableProjectMcpServerRequest'
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProjectMcpServerResponse'
          description: OK
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Bad Request
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Unauthorized
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OrgAuthorizationErrorResponse'
          description: Forbidden
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Not Found
        '422':
          content:
            application/json:
              schema:
                anyOf:
                  - $ref: '#/components/schemas/ErrorResponse'
                  - $ref: '#/components/schemas/McpServerErrorResponse'
          description: Unprocessable Entity
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Internal Server Error
        '503':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Service Unavailable
components:
  schemas:
    EnableProjectMcpServerRequest:
      additionalProperties: false
      properties:
        credential_policy:
          enum:
            - creator
            - org
          type:
            - string
            - 'null'
      required:
        - credential_policy
      type: object
    ProjectMcpServerResponse:
      additionalProperties: false
      properties:
        project_mcp_server:
          $ref: '#/components/schemas/ProjectMcpServer'
      required:
        - project_mcp_server
      type: object
    ErrorResponse:
      additionalProperties: false
      properties:
        code:
          type: string
        error:
          minLength: 1
          type: string
        errors:
          items:
            $ref: '#/components/schemas/ErrorDetail'
          type: array
      required:
        - error
      type: object
    OrgAuthorizationErrorResponse:
      additionalProperties: false
      properties:
        code:
          enum:
            - org_membership_required
            - org_role_insufficient
            - org_suspended
            - account_deleting
          type: string
        error:
          minLength: 1
          type: string
      required:
        - error
        - code
      type: object
    McpServerErrorResponse:
      additionalProperties: false
      properties:
        code:
          enum:
            - mcp_server_key_invalid
            - mcp_server_key_reserved
            - mcp_server_key_taken
            - mcp_server_display_name_invalid
            - mcp_server_url_invalid
            - mcp_server_address_refused
            - mcp_server_unreachable
            - mcp_server_not_mcp
            - mcp_server_auth_unsupported
            - mcp_server_auth_discovery_failed
            - mcp_server_response_too_large
            - mcp_server_auth_change_conflict
            - mcp_credential_policy_required
            - mcp_credential_policy_not_applicable
            - mcp_credential_policy_org_unavailable
          type: string
        error:
          minLength: 1
          type: string
      required:
        - error
        - code
      type: object
    ProjectMcpServer:
      additionalProperties: false
      properties:
        credential_policy:
          enum:
            - creator
            - org
          type:
            - string
            - 'null'
        mcp_server_id:
          format: uuid
          type: string
      required:
        - mcp_server_id
        - credential_policy
      type: object
    ErrorDetail:
      additionalProperties: false
      properties:
        location:
          description: >-
            Where the error occurred, e.g. 'body.items[3].tags' or
            'path.thing-id'
          type: string
        message:
          description: Error message text
          type: string
        value:
          description: The value at the given location
      type: object
  securitySchemes:
    bearerAuth:
      bearerFormat: JWT
      scheme: bearer
      type: http

````