# APM Service Dependencies

APM Service Dependencies shows the upstream and downstream services that interact with a given service. Use the Dependencies tab to view which services call your service (upstream dependencies) and which services your service calls (downstream dependencies). Understanding these relationships helps you trace issues across your service topology and identify potential failure points in your architecture.

The Dependencies interface details both [upstream](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-dependencies/#upstream) and [downstream](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-dependencies/#downstream) service dependencies of the service.

## Upstream dependencies

To see the Upstream Dependencies report, click the **Dependencies** tab, and select **Upstream** from the drop-down.

This section of the Service page provides the following information and affordances:

1. **Requests** chart, very similar to the [APM Service Hits](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-hits/), at the level of individual deployments.
2. **Latency** chart, very similar to the [APM Service Latency](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-latency/), at the level of individual deployments.
3. **Errors** chart, very similar to the [APM Service Errors](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-errors/), at the level of individual deployments.
4. **Options** menu that controls the measurements that appear in the **Dependencies** list.

5. **Search** box for looking up a service deployment name.
6. List for all **Services**. You can control the columns of this list through the **[Options](https://docs.kloudfuse.com/platform/4.0.2/signals/apm/services/detail-dependencies/#options)** drop-down.
7. If you hover your pointer over the name of the upstream service, Kloudfuse shows a summary of some basic attributes of the service:

To see the details of the individual service dependency, click the name of the service.

The **Service** graphical detail page appears:

## Downstream dependencies

To see the Downstream Dependencies report, click the **Dependencies** tab, and select **Downstream** from the drop-down.

This section of the Service page provides the following information and affordances:

To see the details of the individual service dependency, click the name of the service.

The **Service** graphical detail page appears: