Add Service Dependency Support (#99)

* Add service dependency support

* Improve service dependency tools with validation and cleaner output

- Validate service exists via GetService before fetching dependencies/dependents
- Rename ServiceId field to ComponentId for clarity
- Remove non-functional search parameter from both tools
- Remove Locked field from serialized output
- Use empty slice instead of nil for consistent JSON output

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Add changie entry for service dependency tools

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Apply suggestions from code review

Co-authored-by: Farjaad <8631006+Farjaad@users.noreply.github.com>

* rename all service references in new field to component

---------

Co-authored-by: Wesley Ellis <wesley@opslevel.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Farjaad <8631006+Farjaad@users.noreply.github.com>

Author: 4 people

.changes/unreleased/Added-20260218-092748.yaml

@@ -0,0 +1,3 @@
+kind: Added
+body: Add componentDependencies and componentDependents tools to fetch the upstream and downstream service dependency graph for a given component
+time: 2026-02-18T09:27:48.836718-05:00

README.md

@@ -38,6 +38,8 @@ Currently, the MCP server only uses read-only access to your OpsLevel account an
 - Campaigns
 - Checks
 - Components
+- Component Dependencies (components that a component depends on)
+- Component Dependents (components that depend on a component)
 - Documentation (API & Tech Docs)
 - Domains
 - Filters

src/cmd/root.go

@@ -107,6 +107,13 @@ type serializedCampaign struct {
 	Reminder     *opslevel.CampaignReminder
 }
 
+type serializedDependency struct {
+	Id          string
+	ComponentId string
+	Aliases     []string
+	Notes       string
+}
+
 // AccountMetadata represents the different types of account metadata that can be fetched
 type AccountMetadata string
 
@@ -768,6 +775,110 @@ For complete reference:
 				return newToolResult(campaigns, err)
 			})
 
+		// Register component dependencies tool
+		s.AddTool(
+			mcp.NewTool(
+				"componentDependencies",
+				mcp.WithDescription("Get all the components that a specific component depends on. Returns the dependency graph showing which components this component consumes or calls."),
+				mcp.WithString("componentId", mcp.Required(), mcp.Description("The id of the component to fetch dependencies for.")),
+				mcp.WithToolAnnotation(mcp.ToolAnnotation{
+					Title:           "Component Dependencies in OpsLevel",
+					ReadOnlyHint:    &trueValue,
+					DestructiveHint: &falseValue,
+					IdempotentHint:  &trueValue,
+					OpenWorldHint:   &trueValue,
+				}),
+			),
+			func(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+				componentId, err := req.RequireString("componentId")
+				if err != nil {
+					return mcp.NewToolResultError("componentId parameter is required"), nil
+				}
+
+				service, err := client.GetService(componentId)
+				if err != nil {
+					return mcp.NewToolResultErrorFromErr("failed to get component", err), nil
+				}
+				if service.Id == "" {
+					return mcp.NewToolResultError(fmt.Sprintf("component with id %s not found", componentId)), nil
+				}
+
+				variables := &opslevel.PayloadVariables{
+					"after": "",
+					"first": 100,
+				}
+
+				resp, err := service.GetDependencies(client, variables)
+				if err != nil {
+					return mcp.NewToolResultErrorFromErr("failed to get dependencies", err), nil
+				}
+
+				dependencies := []serializedDependency{}
+				for _, edge := range resp.Edges {
+					dep := serializedDependency{
+						Id:          string(edge.Id),
+						ComponentId: string(edge.Node.Id),
+						Aliases:     edge.Node.Aliases,
+						Notes:       edge.Notes,
+					}
+					dependencies = append(dependencies, dep)
+				}
+
+				return newToolResult(dependencies, nil)
+			})
+
+		// Register component dependents tool
+		s.AddTool(
+			mcp.NewTool(
+				"componentDependents",
+				mcp.WithDescription("Get all the components that depend on a specific component. Returns the reverse dependency graph showing which components consume or call this component."),
+				mcp.WithString("componentId", mcp.Required(), mcp.Description("The id of the component to fetch dependents for.")),
+				mcp.WithToolAnnotation(mcp.ToolAnnotation{
+					Title:           "Component Dependents in OpsLevel",
+					ReadOnlyHint:    &trueValue,
+					DestructiveHint: &falseValue,
+					IdempotentHint:  &trueValue,
+					OpenWorldHint:   &trueValue,
+				}),
+			),
+			func(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+				componentId, err := req.RequireString("componentId")
+				if err != nil {
+					return mcp.NewToolResultError("componentId parameter is required"), nil
+				}
+
+				service, err := client.GetService(componentId)
+				if err != nil {
+					return mcp.NewToolResultErrorFromErr("failed to get component", err), nil
+				}
+				if service.Id == "" {
+					return mcp.NewToolResultError(fmt.Sprintf("component with id %s not found", componentId)), nil
+				}
+
+				variables := &opslevel.PayloadVariables{
+					"after": "",
+					"first": 100,
+				}
+
+				resp, err := service.GetDependents(client, variables)
+				if err != nil {
+					return mcp.NewToolResultErrorFromErr("failed to get dependents", err), nil
+				}
+
+				dependents := []serializedDependency{}
+				for _, edge := range resp.Edges {
+					dep := serializedDependency{
+						Id:          string(edge.Id),
+						ComponentId: string(edge.Node.Id),
+						Aliases:     edge.Node.Aliases,
+						Notes:       edge.Notes,
+					}
+					dependents = append(dependents, dep)
+				}
+
+				return newToolResult(dependents, nil)
+			})
+
 		log.Info().Msg("Starting MCP server...")
 		if err := server.ServeStdio(s); err != nil {
 			if err == context.Canceled {