Langfuse

Langfuse Projects API

The Projects API from Langfuse — 4 operation(s) for projects.

GitHub OpenAPI

Documentation

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https://langfuse.com/docs/tracing
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APIReference
https://api.reference.langfuse.com/
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Documentation
https://langfuse.com/docs/api
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https://langfuse.com/docs/analytics
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https://langfuse.com/docs/prompts
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https://langfuse.com/docs/datasets
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https://langfuse.com/docs/evaluation
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Specifications

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OpenAPI
https://raw.githubusercontent.com/api-evangelist/langfuse/refs/heads/main/openapi/langfuse-projects-api-openapi.yml

OpenAPI Specification

langfuse-projects-api-openapi.yml Raw ↑ 
openapi: 3.0.1
info:
  title: langfuse AnnotationQueues Projects API
  version: ''
  description: '## Authentication


    Authenticate with the API using [Basic Auth](https://en.wikipedia.org/wiki/Basic_access_authentication), get API keys in the project settings:


    - username: Langfuse Public Key

    - password: Langfuse Secret Key


    ## Exports


    - OpenAPI spec: https://cloud.langfuse.com/generated/api/openapi.yml'
tags:
- name: Projects
paths:
  /api/public/projects:
    get:
      description: Get Project associated with API key (requires project-scoped API key). You can use GET /api/public/organizations/projects to get all projects with an organization-scoped key.
      operationId: projects_get
      tags:
      - Projects
      parameters: []
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Projects'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
    post:
      description: Create a new project (requires organization-scoped API key)
      operationId: projects_create
      tags:
      - Projects
      parameters: []
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Project'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                metadata:
                  type: object
                  additionalProperties: true
                  nullable: true
                  description: Optional metadata for the project
                retention:
                  type: integer
                  description: Number of days to retain data. Must be 0 or at least 3 days. Requires data-retention entitlement for non-zero values. Optional.
              required:
              - name
              - retention
  /api/public/projects/{projectId}:
    put:
      description: Update a project by ID (requires organization-scoped API key).
      operationId: projects_update
      tags:
      - Projects
      parameters:
      - name: projectId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Project'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                metadata:
                  type: object
                  additionalProperties: true
                  nullable: true
                  description: Optional metadata for the project
                retention:
                  type: integer
                  nullable: true
                  description: 'Number of days to retain data.

                    Must be 0 or at least 3 days.

                    Requires data-retention entitlement for non-zero values.

                    Optional. Will retain existing retention setting if omitted.'
              required:
              - name
    delete:
      description: Delete a project by ID (requires organization-scoped API key). Project deletion is processed asynchronously.
      operationId: projects_delete
      tags:
      - Projects
      parameters:
      - name: projectId
        in: path
        required: true
        schema:
          type: string
      responses:
        '202':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProjectDeletionResponse'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
  /api/public/projects/{projectId}/apiKeys:
    get:
      description: Get all API keys for a project (requires organization-scoped API key)
      operationId: projects_getApiKeys
      tags:
      - Projects
      parameters:
      - name: projectId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiKeyList'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
    post:
      description: Create a new API key for a project (requires organization-scoped API key)
      operationId: projects_createApiKey
      tags:
      - Projects
      parameters:
      - name: projectId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiKeyResponse'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                note:
                  type: string
                  nullable: true
                  description: Optional note for the API key
                publicKey:
                  type: string
                  nullable: true
                  description: Optional predefined public key. Must start with 'pk-lf-'. If provided, secretKey must also be provided.
                secretKey:
                  type: string
                  nullable: true
                  description: Optional predefined secret key. Must start with 'sk-lf-'. If provided, publicKey must also be provided.
  /api/public/projects/{projectId}/apiKeys/{apiKeyId}:
    delete:
      description: Delete an API key for a project (requires organization-scoped API key)
      operationId: projects_deleteApiKey
      tags:
      - Projects
      parameters:
      - name: projectId
        in: path
        required: true
        schema:
          type: string
      - name: apiKeyId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiKeyDeletionResponse'
        '400':
          description: ''
          content:
            application/json:
              schema: {}
        '401':
          description: ''
          content:
            application/json:
              schema: {}
        '403':
          description: ''
          content:
            application/json:
              schema: {}
        '404':
          description: ''
          content:
            application/json:
              schema: {}
        '405':
          description: ''
          content:
            application/json:
              schema: {}
      security:
      - BasicAuth: []
components:
  schemas:
    ApiKeyList:
      title: ApiKeyList
      type: object
      description: List of API keys for a project
      properties:
        apiKeys:
          type: array
          items:
            $ref: '#/components/schemas/ApiKeySummary'
      required:
      - apiKeys
    ApiKeyDeletionResponse:
      title: ApiKeyDeletionResponse
      type: object
      description: Response for API key deletion
      properties:
        success:
          type: boolean
      required:
      - success
    ProjectDeletionResponse:
      title: ProjectDeletionResponse
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
      required:
      - success
      - message
    ApiKeySummary:
      title: ApiKeySummary
      type: object
      description: Summary of an API key
      properties:
        id:
          type: string
        createdAt:
          type: string
          format: date-time
        expiresAt:
          type: string
          format: date-time
          nullable: true
        lastUsedAt:
          type: string
          format: date-time
          nullable: true
        note:
          type: string
          nullable: true
        publicKey:
          type: string
        displaySecretKey:
          type: string
      required:
      - id
      - createdAt
      - publicKey
      - displaySecretKey
    Projects:
      title: Projects
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Project'
      required:
      - data
    ApiKeyResponse:
      title: ApiKeyResponse
      type: object
      description: Response for API key creation
      properties:
        id:
          type: string
        createdAt:
          type: string
          format: date-time
        publicKey:
          type: string
        secretKey:
          type: string
        displaySecretKey:
          type: string
        note:
          type: string
          nullable: true
      required:
      - id
      - createdAt
      - publicKey
      - secretKey
      - displaySecretKey
    Project:
      title: Project
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        organization:
          $ref: '#/components/schemas/Organization'
          description: The organization this project belongs to
        metadata:
          type: object
          additionalProperties: true
          description: Metadata for the project
        retentionDays:
          type: integer
          nullable: true
          description: Number of days to retain data. Null or 0 means no retention. Omitted if no retention is configured.
      required:
      - id
      - name
      - organization
      - metadata
    Organization:
      title: Organization
      type: object
      properties:
        id:
          type: string
          description: The unique identifier of the organization
        name:
          type: string
          description: The name of the organization
      required:
      - id
      - name
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic