Service A2A Requests

These actions provide ability to expose existing microservice capabilities over A2A.

Service A2A Requests Actions

GetA2A

Responds with the agent card configuration for .well-known/agent.json calls.

CallA2A

Responds to a request using A2A protocol. Event metadata fields applicable for this action are as follows:

Fields (table)

Field	Definition	Example	Default
Domain	ID of the A2A server to interact with	procurement_specialist	-
Input Element	Json path for the input in request event payload in A2A JSON-RPC format	message	-
Output Element	Json path for the output in response event payload	output	-

Fields (JSON Schema)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "eventMeta": {
      "type": "object",
      "properties": {
        "domain": {
          "type": "string",
          "description": "ID of the A2A server to interact with",
          "examples": ["procurement_specialist"],
          "default": null
        },
        "inputElement": {
          "type": "string",
          "description": "Json path for the input in request event payload in A2A JSON-RPC format",
          "examples": ["message"],
          "default": null
        },
        "outputElement": {
          "type": "string",
          "description": "Json path for the output in response event payload",
          "examples": ["output"],
          "default": null
        }
      }
    }
  }
}

With event metadata parameters as:

Parameters (table)

Parameter	Definition	Example	Default
Input Pattern	Jmespath expression for converting input payload to A2A call	-	-

Parameters (JSON Schema)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "eventMeta": {
      "type": "object",
      "properties": {
        "parameters": {
          "type": "object",
          "properties": {
            "inputPattern": {
              "type": "string",
              "description": "Jmespath expression for converting input payload to A2A call",
              "default": null
            }
          }
        }
      }
    }
  }
}