> ## Documentation Index > Fetch the complete documentation index at: https://help.treble.ai/llms.txt > Use this file to discover all available pages before exploring further. # Condition Node Webhook Request Body > This endpoint must be implemented on YOUR server (e.g., https://yourdomain.com/webhooks/on-condition). Treble will call this webhook when a conditional node is evaluated in the conversation. You must configure the URL of this webhook in the Treble admin panel. You can also configure the response webhook for each path that exits from a condition node. Configure condition node webhook If you do this, the HTTP request body that is sent to the endpoint configured in Treble will add the following field to the request body: ```json theme={null} { "condition": { "operator": "EQ", "value": "18" } } ``` The condition is an object with an `operator` property to show which action was used in the condition and a `value` for the condition action to be evaluated: * Equal: EQ * Different: DIFF * Greater than: GT * Less than: LT * Greater than or equal to: GTEQ * Less than or equal to: LTEQ * Contains: CONT * Does not contain: NCONT * Default path: DEFAULT The response can also have new variables for the session that can be updated or created for later use in the session. That is, you can add them in the webhook response as part of the `user_session_keys`. ## OpenAPI ````yaml open-api-files/treble-api-en.json POST /webhooks/on-condition openapi: 3.0.1 info: title: Treble Poll API description: Documentation for the poll deployment endpoint in Treble version: 1.0.0 servers: - url: https://main.treble.ai description: Main Treble server - url: https://yourdomain.com description: >- Example server for implementing webhooks. This represents YOUR server where you must implement the endpoints that Treble will call. security: [] tags: - name: Webhooks description: >- Endpoints that Treble will call on your server. These are not real endpoints that you can call, but a representation of the webhooks that Treble will invoke in your system. paths: /webhooks/on-condition: post: tags: - Webhooks summary: Webhook - When a conditional node is evaluated description: >- This endpoint must be implemented on YOUR server (e.g., https://yourdomain.com/webhooks/on-condition). Treble will call this webhook when a conditional node is evaluated in the conversation. You must configure the URL of this webhook in the Treble admin panel. requestBody: description: Information of the condition evaluation event content: application/json: schema: $ref: '#/components/schemas/ConditionEvent' example: country_code: '+57' cellphone: '3161234567' session_id: abcsderfwer3252432423-1324325235 conversation_id: 1234 variable: name: age value: '18' condition: operator: EQ value: '18' user_session_keys: - key: age value: '18' type: null - key: user_id value: '12345' type: null responses: '200': description: Response to update or add information to the session content: application/json: schema: type: object description: >- JSON object with the new information that will be replaced or added to the session for future use. The service must respond in less than 10 seconds. servers: - url: https://yourdomain.com description: Your server where you must implement this webhook components: schemas: ConditionEvent: type: object required: - country_code - cellphone - session_id - conversation_id - variable - condition - user_session_keys description: >- Event that is triggered when a conditional node is evaluated in the conversation properties: country_code: type: string description: Country code of the user cellphone: type: string description: User's phone number without the country code session_id: type: string description: ID of the user's session conversation_id: type: integer description: ID of the conversation variable: $ref: '#/components/schemas/Variable' description: Variable that is evaluated in the condition condition: $ref: '#/components/schemas/Condition' description: Condition that is evaluated user_session_keys: type: array description: >- User session keys collected during the conversation or provided during the deployment items: $ref: '#/components/schemas/ExtendedUserSessionKey' Variable: type: object required: - name - value properties: name: type: string description: Name of the variable that is evaluated in the condition value: type: string description: Current value of the variable Condition: type: object required: - operator - value properties: operator: type: string description: >- Operator used to evaluate the condition (e.g.: 'EQ' for equal, 'GT' for greater than, etc.) enum: - EQ - GT - LT - GTE - LTE - NEQ value: type: string description: Value against which the variable is compared ExtendedUserSessionKey: type: object required: - key - value properties: key: type: string description: Name of the variable value: type: string description: Value of the variable type: type: string nullable: true description: >- Type of the variable. Can be null or a specific type like 'location'. ````