Retell AI Update Test Case Definition API

openapi: 3.0.3
info:
  title: Retell SDK Add Community Voice Update Test Case Definition API
  version: 3.0.0
  contact:
    name: Retell Support
    url: https://www.retellai.com/
    email: support@retellai.com
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
servers:
- url: https://api.retellai.com
  description: The production server.
security:
- api_key: []
tags:
- name: Update Test Case Definition
paths:
  /update-test-case-definition/{test_case_definition_id}:
    put:
      description: Update a test case definition
      operationId: updateTestCaseDefinition
      parameters:
      - in: path
        name: test_case_definition_id
        schema:
          type: string
        required: true
        description: ID of the test case definition to update
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TestCaseDefinitionInput'
      responses:
        '200':
          description: Test case definition updated successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TestCaseDefinition'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/InternalServerError'
      tags:
      - Update Test Case Definition
components:
  schemas:
    ResponseEngineConversationFlow:
      type: object
      required:
      - type
      - conversation_flow_id
      properties:
        type:
          type: string
          enum:
          - conversation-flow
          description: type of the Response Engine.
        conversation_flow_id:
          type: string
          description: ID of the Conversation Flow Response Engine.
        version:
          type: number
          example: 0
          description: Version of the Conversation Flow Response Engine.
          nullable: true
    ToolMock:
      type: object
      required:
      - tool_name
      - input_match_rule
      - output
      properties:
        tool_name:
          type: string
          description: Name of the tool to mock
        input_match_rule:
          $ref: '#/components/schemas/ToolMockInputMatchRule'
          description: Rule for matching tool calls
        output:
          type: string
          maxLength: 15000
          description: The output of the tool call that will be fed into the LLM. Should be a JSON string.
        result:
          type: boolean
          nullable: true
          description: For tool calls like transfer_call that require a boolean result. Optional for most tools.
    TestCaseDefinitionInput:
      type: object
      properties:
        name:
          type: string
          description: Name of the test case definition
        response_engine:
          $ref: '#/components/schemas/RetellResponseEngine'
          description: Response engine to use for the test case. Custom LLM is not supported.
        user_prompt:
          type: string
          description: User prompt to simulate in the test case
        metrics:
          type: array
          items:
            type: string
          description: Array of metric names to evaluate
        dynamic_variables:
          type: object
          additionalProperties:
            type: string
          description: Dynamic variables to inject into the response engine
        tool_mocks:
          type: array
          items:
            $ref: '#/components/schemas/ToolMock'
          description: Mock tool calls for testing
        llm_model:
          $ref: '#/components/schemas/LLMModel'
          description: LLM model to use for simulation
    TestCaseDefinition:
      allOf:
      - $ref: '#/components/schemas/TestCaseDefinitionInput'
      - type: object
        required:
        - name
        - response_engine
        - metrics
        - user_prompt
        - dynamic_variables
        - tool_mocks
        - llm_model
        - test_case_definition_id
        - type
        - creation_timestamp
        - user_modified_timestamp
        properties:
          test_case_definition_id:
            type: string
            description: Unique identifier for the test case definition
          type:
            type: string
            enum:
            - simulation
            description: Type of test case definition
          creation_timestamp:
            type: integer
            description: Timestamp when the test case definition was created (milliseconds since epoch)
          user_modified_timestamp:
            type: integer
            description: Timestamp when the test case definition was last modified (milliseconds since epoch)
    ToolMockInputMatchRule:
      oneOf:
      - type: object
        required:
        - type
        properties:
          type:
            type: string
            enum:
            - any
            description: Match any input of the tool
      - type: object
        required:
        - type
        - args
        properties:
          type:
            type: string
            enum:
            - partial_match
            description: Match only calls with specific arguments
          args:
            type: object
            additionalProperties: true
            description: Arguments to match. Only provided fields will be checked
    LLMModel:
      type: string
      enum:
      - gpt-4.1
      - gpt-4.1-mini
      - gpt-4.1-nano
      - gpt-5
      - gpt-5-mini
      - gpt-5-nano
      - gpt-5.1
      - gpt-5.2
      - gpt-5.4
      - gpt-5.4-mini
      - gpt-5.4-nano
      - gpt-5.5
      - claude-4.5-sonnet
      - claude-4.6-sonnet
      - claude-4.5-haiku
      - gemini-2.5-flash-lite
      - gemini-3.0-flash
      - gemini-3.1-flash-lite
      description: Available LLM models for agents.
    ResponseEngineRetellLm:
      type: object
      required:
      - type
      - llm_id
      properties:
        type:
          type: string
          enum:
          - retell-llm
          description: type of the Response Engine.
        llm_id:
          type: string
          description: id of the Retell LLM Response Engine.
        version:
          type: number
          example: 0
          description: Version of the Retell LLM Response Engine.
          nullable: true
    RetellResponseEngine:
      oneOf:
      - $ref: '#/components/schemas/ResponseEngineRetellLm'
      - $ref: '#/components/schemas/ResponseEngineConversationFlow'
      description: Response engine for test cases. Custom LLM is not supported.
  responses:
    TooManyRequests:
      description: Too Many Requests
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              message:
                type: string
                example: Account rate limited, please throttle your requests.
    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              message:
                type: string
                example: API key is missing or invalid.
    BadRequest:
      description: Bad Request
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              message:
                type: string
                example: Invalid request format, please check API reference.
    NotFound:
      description: Not Found
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              message:
                type: string
                example: The requested resource was not found.
    InternalServerError:
      description: Internal Server Error
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              message:
                type: string
                example: An unexpected server error occurred.
  securitySchemes:
    api_key:
      type: http
      scheme: bearer
      bearerFormat: string
      description: Authentication header containing API key (find it in dashboard). The format is "Bearer YOUR_API_KEY"