Dapr Metadata

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/dapr/blob/main/json-schema/metadata.json",
  "title": "Dapr Metadata",
  "description": "Represents the metadata response from the Dapr sidecar, including application connection details, registered components, active subscriptions, HTTP endpoints, and custom extended attributes.",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The application ID."
    },
    "runtimeVersion": {
      "type": "string",
      "description": "The Dapr runtime version."
    },
    "enabledFeatures": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "List of enabled Dapr features."
    },
    "actors": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "type": {
            "type": "string",
            "description": "The registered actor type name."
          },
          "count": {
            "type": "integer",
            "description": "The number of active instances of this actor type."
          }
        }
      },
      "description": "Registered actor types and their active instance counts."
    },
    "components": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string",
            "description": "The component name."
          },
          "type": {
            "type": "string",
            "description": "The component type (e.g., state.redis, pubsub.kafka)."
          },
          "version": {
            "type": "string",
            "description": "The component version."
          },
          "capabilities": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "Capabilities supported by this component."
          }
        }
      },
      "description": "Registered Dapr components."
    },
    "subscriptions": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "pubsubname": {
            "type": "string",
            "description": "The pub/sub component name."
          },
          "topic": {
            "type": "string",
            "description": "The subscribed topic."
          },
          "rules": {
            "type": "array",
            "items": {
              "type": "object"
            },
            "description": "Subscription routing rules."
          },
          "deadLetterTopic": {
            "type": "string",
            "description": "The dead letter topic for failed messages."
          }
        }
      },
      "description": "Active pub/sub subscriptions."
    },
    "httpEndpoints": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string",
            "description": "The HTTP endpoint name."
          }
        }
      },
      "description": "Registered HTTP endpoints."
    },
    "appConnectionProperties": {
      "type": "object",
      "description": "Application connection properties.",
      "properties": {
        "port": {
          "type": "integer",
          "description": "The application port."
        },
        "protocol": {
          "type": "string",
          "description": "The application protocol (http or grpc)."
        },
        "channelAddress": {
          "type": "string",
          "description": "The application channel address."
        },
        "maxConcurrency": {
          "type": "integer",
          "description": "Maximum concurrency level for the application."
        },
        "health": {
          "type": "object",
          "properties": {
            "healthCheckPath": {
              "type": "string",
              "description": "The health check endpoint path."
            },
            "healthProbeInterval": {
              "type": "string",
              "description": "Interval between health probes."
            },
            "healthProbeTimeout": {
              "type": "string",
              "description": "Timeout for health probes."
            },
            "healthThreshold": {
              "type": "integer",
              "description": "Number of consecutive failures before unhealthy."
            }
          },
          "description": "Application health check configuration."
        }
      }
    },
    "extended": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      },
      "description": "Custom extended metadata attributes."
    }
  }
}