> ## Documentation Index > Fetch the complete documentation index at: https://docs.particle.pro/llms.txt > Use this file to discover all available pages before exploring further. # Send a test webhook > Sends a synthetic `alert.match.created` payload to every active webhook connection attached to this alert, so you can verify your endpoint end to end — receipt, signature, and parsing — without waiting for a real match. The payload is byte-for-byte shaped like a live delivery and carries this alert's real id, title, kind, and first watched entity, but its match content is illustrative sample data and the envelope is flagged `test: true` so your handler can skip real side effects. Nothing is persisted — a test never appears in the alert's delivery log. Returns one result per connection the test was POSTed to: whether the endpoint accepted the POST, its status code, and any error. Channels whose connection has been deleted are skipped and don't appear in the results. A down or non-2xx endpoint is reported as `delivered: false` rather than failing the request. Returns 422 when the alert has no active webhook connection — either none is configured, or every configured connection has been deleted. ## OpenAPI ````yaml /openapi.json post /v1/alerts/{id}/test-webhook openapi: 3.1.0 info: description: Public API for Particle — news intelligence, financial data, and analysis. title: Particle API version: 0.1.0 servers: - url: https://api.particle.pro security: - ApiKeyHeader: [] - BearerAuth: [] paths: /v1/alerts/{id}/test-webhook: post: tags: - Alerts - tier:standard summary: Send a test webhook description: >- Sends a synthetic `alert.match.created` payload to every active webhook connection attached to this alert, so you can verify your endpoint end to end — receipt, signature, and parsing — without waiting for a real match. The payload is byte-for-byte shaped like a live delivery and carries this alert's real id, title, kind, and first watched entity, but its match content is illustrative sample data and the envelope is flagged `test: true` so your handler can skip real side effects. Nothing is persisted — a test never appears in the alert's delivery log. Returns one result per connection the test was POSTed to: whether the endpoint accepted the POST, its status code, and any error. Channels whose connection has been deleted are skipped and don't appear in the results. A down or non-2xx endpoint is reported as `delivered: false` rather than failing the request. Returns 422 when the alert has no active webhook connection — either none is configured, or every configured connection has been deleted. operationId: send-alert-test-webhook parameters: - description: Alert ID in: path name: id required: true schema: description: Alert ID type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/AlertTestWebhookResult' description: OK default: content: application/problem+json: schema: $ref: '#/components/schemas/PlatformError' description: Error x-codeSamples: - label: cURL lang: curl source: |- curl -X POST \ -H "X-API-Key: $PARTICLE_API_KEY" \ "https://api.particle.pro/v1/alerts/{id}/test-webhook" components: schemas: AlertTestWebhookResult: additionalProperties: false properties: deliveries: description: >- One entry per active webhook connection the test was POSTed to, in the order attempted. A channel whose connection has been deleted is skipped and does not appear here. items: $ref: '#/components/schemas/AlertTestWebhookDelivery' type: - array - 'null' required: - deliveries type: object PlatformError: additionalProperties: false properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string error_code: type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string resolve: $ref: '#/components/schemas/ErrorResolve' status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string type: object AlertTestWebhookDelivery: additionalProperties: false properties: delivered: description: True when the endpoint acknowledged with a 2xx status. type: boolean duration_ms: description: Round-trip time for the POST in milliseconds. format: int64 type: integer error: description: >- Failure reason when delivered is false — the endpoint's non-2xx status or the transport error. type: string status_code: description: >- HTTP status the endpoint returned. Absent on a transport-level failure (timeout, connection refused, or a blocked non-public address). format: int64 type: integer url: description: The destination the test payload was POSTed to. type: string webhook_connection_id: type: string required: - webhook_connection_id - url - delivered type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object ErrorResolve: additionalProperties: false properties: action: type: string endpoint: type: string message: type: string method: type: string url: type: string required: - message type: object securitySchemes: ApiKeyHeader: description: Pass your API key in the X-API-Key header (recommended). in: header name: X-API-Key type: apiKey BearerAuth: description: Pass your API key as a Bearer token in the Authorization header. scheme: bearer type: http ````