> ## Documentation Index > Fetch the complete documentation index at: https://docs.catenatelematics.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Event Schema Version > Get detailed information about a specific webhook event schema by its name and version. ## OpenAPI ````yaml https://api.catenatelematics.com/v2/notifications/openapi.json get /v2/notifications/schemas/{event_name}/versions/{version} openapi: 3.1.0 info: title: Notifications Service - REST API description: Notifications Service REST API. version: 0.1.0 servers: - url: https://api.catenatelematics.com description: Catena Telematics API security: [] tags: - name: Webhook Subscriptions description: >- Create and manage webhooks to subscribe to events and receive notifications when they occur. - name: Webhook Event Schemas description: Get the OpenAPI 3.0 schema for our versioned webhook events. - name: Webhook Events description: View available webhook events. paths: /v2/notifications/schemas/{event_name}/versions/{version}: get: tags: - Webhook Event Schemas summary: Get Event Schema Version description: >- Get detailed information about a specific webhook event schema by its name and version. operationId: get_event_schema_versions parameters: - name: event_name in: path required: true schema: type: string title: Event Name - name: version in: path required: true schema: type: string title: Version responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/EventSchema' '400': content: application/json: schema: $ref: '#/components/schemas/BadRequest' description: Bad Request '401': content: application/json: schema: $ref: '#/components/schemas/Unauthorized' description: Unauthorized '403': content: application/json: schema: $ref: '#/components/schemas/Forbidden' description: Forbidden '404': content: application/json: schema: $ref: '#/components/schemas/NotFound' description: Not Found '405': content: application/json: schema: $ref: '#/components/schemas/MethodNotAllowed' description: Method Not Allowed '409': content: application/json: schema: $ref: '#/components/schemas/Conflict' description: Conflict '422': content: application/json: schema: $ref: '#/components/schemas/UnprocessableEntity' description: Unprocessable Entity '429': content: application/json: schema: $ref: '#/components/schemas/TooManyRequests' description: Too Many Requests '500': content: application/json: schema: $ref: '#/components/schemas/InternalServerError' description: Internal Server Error security: - Bearer: [] components: schemas: EventSchema: properties: event_name: type: string title: Event Name description: The name of the event version: type: string pattern: ^\d+\.\d+$ title: Version description: The version of the schema examples: - '1.0' - '1.1' - '2.0' created_at: type: string format: date-time title: Created At description: The date and time the schema was created openapi_schema: type: string title: OpenAPI Schema description: >- The complete OpenAPI 3.0 document containing the event schema as a JSON string examples: - >- {"openapi": "3.0.0", "info": {"title": "Event Schema", "version": "1.0.0"}, "components": {"schemas": {"EventSchema": {"type": "object", "properties": {"event_name": {"type": "string"}}}}}} changelog: type: string title: ChangeLog description: >- The changes made to this version of the schema, when compared to the previous version default: Initial schema version type: object required: - event_name - version - openapi_schema title: EventSchema description: Model for storing event schemas and their versions BadRequest: properties: code: type: integer title: Code default: 400 message: type: string title: Message default: Bad Request detail: anyOf: - type: string - type: 'null' title: Detail type: object title: BadRequest Unauthorized: properties: code: type: integer title: Code default: 401 message: type: string title: Message default: Unauthorized detail: anyOf: - type: string - type: 'null' title: Detail type: object title: Unauthorized Forbidden: properties: code: type: integer title: Code default: 403 message: type: string title: Message default: Forbidden detail: anyOf: - type: string - type: 'null' title: Detail type: object title: Forbidden NotFound: properties: code: type: integer title: Code default: 404 message: type: string title: Message default: Not Found detail: anyOf: - type: string - type: 'null' title: Detail type: object title: NotFound MethodNotAllowed: properties: code: type: integer title: Code default: 405 message: type: string title: Message default: Method Not Allowed detail: anyOf: - type: string - type: 'null' title: Detail type: object title: MethodNotAllowed Conflict: properties: code: type: integer title: Code default: 409 message: type: string title: Message default: Conflict detail: anyOf: - type: string - type: 'null' title: Detail type: object title: Conflict UnprocessableEntity: properties: code: type: integer title: Code default: 422 message: type: string title: Message default: Invalid Request Body detail: anyOf: - items: $ref: '#/components/schemas/ValidationErrorDetail' type: array - type: 'null' title: Detail type: object title: UnprocessableEntity TooManyRequests: properties: code: type: integer title: Code default: 429 message: type: string title: Message default: Too Many Requests detail: anyOf: - $ref: '#/components/schemas/RetryAfterDetail' - type: 'null' type: object title: TooManyRequests InternalServerError: properties: message: type: string title: Message default: Internal Server Error type: object title: InternalServerError ValidationErrorDetail: properties: path: type: string title: Path input: type: string title: Input message: type: string title: Message error_type: type: string title: Error Type type: object required: - path - input - message - error_type title: ValidationErrorDetail RetryAfterDetail: properties: retry_after_seconds: type: integer title: Retry After Seconds message: type: string title: Message type: object required: - retry_after_seconds - message title: RetryAfterDetail securitySchemes: Bearer: type: oauth2 flows: clientCredentials: refreshUrl: >- https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token scopes: {} tokenUrl: >- https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token authorizationCode: refreshUrl: >- https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token scopes: {} authorizationUrl: >- https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/auth tokenUrl: >- https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token ````