External Calls

The External Calls pane in the service details page tracks all outbound calls your application makes to external services, including HTTP APIs, gRPC endpoints, and AWS Lambda functions.

Required span attributes

For a span to appear in this pane:

• span.kind = 3 — spans of kind CLIENT.
• One of the following attribute sets must be present:
  • rpc.system, rpc.service, rpc.method
  • rpc.system, net.peer.name, net.peer.port
  • rpc.system, net.peer.ip, net.peer.port
  • http.host
  • net.peer.name, net.peer.port
  • net.peer.ip, net.peer.port
  • http.url
  • peer.service

The remote host address is resolved from the first matching attribute set in the order above.

If your services are making external calls but the panel is empty, verify that your spans include the required attributes.

Metrics displayed

• Error percentage — share of external calls that returned errors.
• Average duration (ms) — mean latency of all outbound calls.
• Calls per second by address — throughput broken down by remote host.
• Average duration by address — latency broken down by remote host.

If you need help with the steps in this topic, please reach out to us on SigNoz Community Slack.

If you are a SigNoz Cloud user, please use in product chat support located at the bottom right corner of your SigNoz instance or contact us at cloud-support@signoz.io.