LangWatch Projects API

openapi: 3.1.0
info:
  title: LangWatch Agents Projects API
  version: 1.0.0
  description: LangWatch openapi spec
servers:
- url: https://app.langwatch.ai
security:
- project_api_key: []
tags:
- name: Projects
paths:
  /api/projects:
    get:
      operationId: listProjects
      summary: List projects
      description: List all non-archived projects for the organization (paginated). Requires an admin API key with project:view permission.
      security:
      - admin_api_key: []
      parameters:
      - in: query
        name: page
        schema:
          type: integer
          minimum: 1
          default: 1
      - in: query
        name: limit
        schema:
          type: integer
          minimum: 1
          maximum: 1000
          default: 50
      responses:
        '200':
          description: Paginated list of projects
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Project'
                  pagination:
                    $ref: '#/components/schemas/Pagination'
        '401':
          description: Invalid or missing API key token
        '403':
          description: Insufficient permissions for this operation
      tags:
      - Projects
    post:
      operationId: createProject
      summary: Create a project
      description: Create a new project in the organization. Returns the project with its API key (sk-lw-...) for sending traces. Provide either teamId (existing team) or newTeamName (creates a new team). Requires project:create permission.
      security:
      - admin_api_key: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                  minLength: 1
                  maxLength: 255
                  description: Project name
                teamId:
                  type: string
                  description: ID of an existing team to assign the project to
                newTeamName:
                  type: string
                  maxLength: 255
                  description: Name for a new team to create and assign the project to
                language:
                  type: string
                  description: Programming language (e.g. python, typescript)
                framework:
                  type: string
                  description: Framework (e.g. langchain, vercel-ai, openai)
              required:
              - name
              - language
              - framework
      responses:
        '201':
          description: Project created. Returns a scoped service API key for this project.
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/Project'
                - type: object
                  properties:
                    serviceApiKey:
                      type: string
                      description: Scoped service API key with ADMIN on this project (sk-lw-..._...). Store securely — shown only once.
                    serviceApiKeyId:
                      type: string
                      description: ID of the auto-created service key, for management via DELETE /api/api-keys/{id}.
        '400':
          description: Team does not belong to this organization
        '401':
          description: Invalid or missing API key token
        '403':
          description: Insufficient permissions (requires project:create)
        '409':
          description: A project with this name already exists in the team
        '422':
          description: Validation error (missing required fields)
      tags:
      - Projects
  /api/projects/{id}:
    get:
      operationId: getProject
      summary: Get a project
      description: Get a project by ID, including its API key. Requires project:view permission.
      security:
      - admin_api_key: []
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
        description: Project ID (project_...)
      responses:
        '200':
          description: Project details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Project'
        '401':
          description: Invalid or missing API key token
        '403':
          description: Insufficient permissions for this operation
        '404':
          description: Project not found
      tags:
      - Projects
    patch:
      operationId: updateProject
      summary: Update a project
      description: Update project fields. Only provided fields are changed. Requires project:update permission.
      security:
      - admin_api_key: []
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
        description: Project ID
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                  minLength: 1
                  maxLength: 255
                language:
                  type: string
                framework:
                  type: string
                piiRedactionLevel:
                  type: string
                  enum:
                  - STRICT
                  - ESSENTIAL
                  - DISABLED
      responses:
        '200':
          description: Updated project
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Project'
        '401':
          description: Invalid or missing API key token
        '403':
          description: Insufficient permissions (requires project:update)
        '404':
          description: Project not found
      tags:
      - Projects
    delete:
      operationId: archiveProject
      summary: Archive a project
      description: Soft-delete (archive) a project. Archived projects are excluded from list responses. Requires project:delete permission.
      security:
      - admin_api_key: []
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
        description: Project ID
      responses:
        '200':
          description: Project archived
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  name:
                    type: string
                  archivedAt:
                    type: string
                    format: date-time
        '401':
          description: Invalid or missing API key token
        '403':
          description: Insufficient permissions (requires project:delete)
        '404':
          description: Project not found
      tags:
      - Projects
components:
  schemas:
    Pagination:
      type: object
      properties:
        page:
          type: integer
        limit:
          type: integer
        total:
          type: integer
    Project:
      type: object
      properties:
        id:
          type: string
          description: Project ID (project_...)
        name:
          type: string
        slug:
          type: string
        language:
          type: string
        framework:
          type: string
        teamId:
          type: string
        piiRedactionLevel:
          type: string
          enum:
          - STRICT
          - ESSENTIAL
          - DISABLED
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
  securitySchemes:
    project_api_key:
      type: apiKey
      in: header
      name: X-Auth-Token
      description: 'Project API key for sending traces and accessing project-scoped resources. Format: sk-lw-... (no underscore). Obtain one by creating a project via the Admin API or the LangWatch UI.'
    admin_api_key:
      type: http
      scheme: bearer
      description: 'Admin API key for organization-level operations (managing projects, API keys). Create one in Settings > API Keys or via POST /api/api-keys. Format: sk-lw-{id}_{secret}.'