Power Platform Community Forum Thread Details

I'm trying to create a webhook trigger in Power Automate via the OpenApi spec.
The webhook url must be in the body and it's required, but I also want to have dynamic properties in the body aswell. So far I have this:

"/webhook/triggers/{entityType}": {
 "x-ms-notification-content": {
 "description": "When a operation is performed on a entity",
 "x-ms-summary": "When a operation is performed on a entity",
 "schema": {
 "type": "object",
 "properties": {
 "data": {
 "type": "object",
 "x-ms-dynamic-schema": {
 "operationId": "GetDynamicSchema",
 "parameters": {
 "entityType": {
 "parameter": "entityType"
 }
 }
 }
 },
 "id": {
 "type": "string"
 },
 "source": {
 "type": "string"
 },
 "type": {
 "type": "string"
 },
 "time": {
 "format": "date-time",
 "type": "string"
 },
 "dataSchema": {
 "type": "string"
 },
 "dataContentType": {
 "type": "string"
 },
 "extensionAttributes": {
 "type": "object",
 "additionalProperties": {
 "type": "object"
 }
 }
 }
 }
 },
 "post": {
 "description": "When a operation is performed on a entity",
 "x-ms-trigger": "single",
 "x-ms-visibility": "important",
 "summary": "When a operation is performed on a entity",
 "operationId": "RegisterTriggerWithEntity",
 "consumes": ["application/json"],
 "produces": ["application/json"],
 "parameters": [
 {
 "name": "entityType",
 "x-ms-summary": "Entity",
 "description": "The entity",
 "x-ms-url-encoding": "single",
 "in": "path",
 "required": true,
 "type": "string",
 "x-ms-dynamic-values": {
 "operationId": "GetEntityTypes",
 "value-path": "name",
 "value-title": "description"
 }
 },
 {
 "name": "body",
 "in": "body",
 "required": true,
 "schema": {
 "type": "object",
 "properties": {
 "webhookUrl": {
 "type": "string",
 "x-ms-notification-url": true,
 "x-ms-visibility": "internal"
 },
 "data": {
 "type": "object",
 "x-ms-dynamic-schema": {
 "operationId": "GetSchema",
 "parameters": {
 "entityType": {
 "parameter": "entityType"
 }
 }
 },
 "x-ms-dynamic-properties": {
 "operationId": "GetSchema",
 "parameters": {
 "entityType": {
 "parameterReference": "entityType"
 }
 }
 }
 }
 },
 "required": [
 "webhookUrl"
 ],
 "x-ms-visibility": "important"
 }
 }
 ],
 "responses": {
 "201": {
 "description": "Created"
 },
 "401": {
 "description": "Unauthorized"
 },
 "403": {
 "description": "Forbidden"
 }
 }
 }
 }

Which passes validation, I also have the schema properties prompted in the UI ready to be provided by the user, but on saving the flow, I get the following OpenApiOperationParameterValidationFailed:

Flow save failed with code 'OpenApiOperationParameterValidationFailed' and message 'Input parameter 'body' validation failed in workflow operation 'When_a_operation_is_performed_on_a_entity': The API operation 'RegisterTriggerWithEntity' requires the property 'body/data' to be set to one of its defined enum values '[]' but is set to '{ "firstProperty": "testValue" }'.'.

What might be the problem with this flow? What is the suggested way of having a webhook trigger with dynamic schema properties?

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Webhook trigger with dynamic schema properties

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