The Get Test Case Definition API from Retell AI — 1 operation(s) for get test case definition.
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openapi: 3.2.0
info:
title: Retell SDK Get 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: Get Test Case Definition
paths:
/get-test-case-definition/{test_case_definition_id}:
get:
description: Get a test case definition by ID
operationId: getTestCaseDefinition
parameters:
- in: path
name: test_case_definition_id
schema:
type: string
required: true
description: ID of the test case definition to retrieve
responses:
'200':
description: Test case definition retrieved 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:
- Get Test Case Definition
summary: Get test case definition
x-summary-source: derived
components:
schemas:
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
- 'null'
description: For tool calls like transfer_call that require a boolean result. Optional for most tools.
RetellResponseEngine:
oneOf:
- $ref: '#/components/schemas/ResponseEngineRetellLm'
- $ref: '#/components/schemas/ResponseEngineConversationFlow'
description: Response engine for test cases. Custom LLM is not supported.
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
- 'null'
example: 0
description: Version of the Retell LLM Response Engine.
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
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
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
- 'null'
example: 0
description: Version of the Conversation Flow Response Engine.
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.
responses:
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.
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.
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.
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.
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.
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"