> ## Documentation Index > Fetch the complete documentation index at: https://docs.streamlinedpayments.com/llms.txt > Use this file to discover all available pages before exploring further. # Send test event > Sends a `ping` event to this endpoint only, whatever it subscribes to, so you can check the URL and your signature verification. Queued like any delivery; its outcome appears in the deliveries list. ## OpenAPI ````yaml /api-reference/openapi.yaml post /webhook_endpoints/{uuid}/test openapi: 3.0.3 info: title: Streamlined API description: > Access customers, customer applications, customer groups, products, payouts, invoices, transactions, and deposit links programmatically through this API, and receive webhooks when deposit links change. All requests must be authenticated with an API key. version: 1.6.0 license: name: Proprietary url: https://streamlinedpayments.com/terms servers: - url: https://api.staging.streamlinedpayments.com/api/v1 description: Sandbox - url: https://api.streamlinedpayments.com/api/v1 description: Production security: - AppIdAuth: [] ApiKeyAuth: [] tags: - name: Customers description: Create, update and delete the businesses you sell to. - name: Customer applications description: >- List the applications your customers submit, and approve them. Approving can also set net terms and export the customer to Shopify. See [Approve customer applications](/guides/customer-applications). - name: Customer groups description: >- Organize customers into groups and manage who's in each one. A group can be linked to a Shopify B2B company. - name: Customer files description: Upload and manage files attached to a customer. - name: Customer addresses description: Manage a customer's addresses and choose their default billing address. - name: Orders description: Create orders, add and remove line items, and schedule them. - name: Invoices description: Create invoices from orders, then list, look up and update them. - name: Transactions description: List transactions and look one up. - name: Payouts description: List payouts, including pending ones, and look one up. - name: Products description: >- Create and update the products and services you sell, import them in bulk, and merge duplicates. - name: Deposit links description: Collect money from a customer before an invoice exists. - name: Webhooks description: >- Register HTTPS endpoints to receive events when something changes. See [Webhooks](/guides/webhooks) for signatures, retries and delivery guarantees. paths: /webhook_endpoints/{uuid}/test: post: tags: - Webhooks summary: Send test event description: > Sends a `ping` event to this endpoint only, whatever it subscribes to, so you can check the URL and your signature verification. Queued like any delivery; its outcome appears in the deliveries list. operationId: testWebhookEndpoint parameters: - name: uuid in: path required: true schema: type: string responses: '202': description: Queued. content: application/json: schema: type: object properties: delivery: $ref: '#/components/schemas/WebhookDelivery' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '422': description: The endpoint is disabled. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: endpoint_disabled message: Enable the endpoint before testing it. components: schemas: WebhookDelivery: type: object properties: uuid: type: string description: Also sent as the Streamlined-Delivery-Id header. event_id: type: string description: The event's id, also its Streamlined-Event-Id header. event_type: type: string status: type: string enum: - pending - succeeded - failed description: > `pending` is not delivered yet, and retrying if `attempts` is above zero. `failed` gave up after every retry, or the endpoint was switched off first. attempts: type: integer response_status: type: integer nullable: true description: The HTTP status of the latest attempt. Null if we could not connect. error: type: string nullable: true description: >- Why the latest attempt could not connect, or why we refused to. Null when there was a response. last_attempted_at: type: string format: date-time nullable: true next_attempt_at: type: string format: date-time nullable: true delivered_at: type: string format: date-time nullable: true created_at: type: string format: date-time Error: type: object properties: error: type: string message: type: string responses: Unauthorized: description: Authentication failed content: application/json: schema: $ref: '#/components/schemas/Error' examples: AuthenticationRequired: value: error: Authentication required message: >- API endpoint requires authentication. Please provide valid X-App-Id and X-Api-Key headers. InvalidCredentials: value: error: Invalid credentials message: >- The provided API credentials are invalid. Please check your X-App-Id and X-Api-Key values. NotFound: description: Resource not found. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: AppIdAuth: type: apiKey in: header name: X-App-Id description: App ID for authentication ApiKeyAuth: type: apiKey in: header name: X-Api-Key description: API Key for authentication ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.