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MCP Servers

MCP Servers dashboard — sections labelled SERVERS — VOLUME & QUALITY and OAUTH STATE; six KPI cards on the volume row (MCP servers, Servers up, MCP tool calls, Distinct tools, p95 latency, Error rate), four KPI cards in the OAuth row (OAuth authorized, OAuth awaiting, OAuth errored/offline, OAuth expiring <5 min), and the MCP calls / minute stacked-by-transport chart

MCP Servers — Servers up 1 / 1 and OAuth authorized 1 reflect the built-in spring-ai-playground-tool-mcp server registered over streamable-http. Tool-call volume bars surface as soon as an external MCP catalog entry is activated and the agent reaches a tool through it.

Purpose — external MCP server health and traffic. Latency by transport, OAuth state across servers, lifecycle events.

When to look here

  • "Is one MCP server slow?" — Latency p50 / p95 / p99 stacked by transport; Top servers identifies which one carries the most traffic.
  • "Did an OAuth token expire silently?" — OAuth expiring <5 min KPI + the OAuth status grid below.
  • "Is the agent reaching a server that crashed?" — Servers up vs MCP servers KPI gap (e.g. 3 / 5 is two servers down).
  • "Which transport family dominates?" — Transport mix donut (stdio / streamable-http / sse).
  • "Did the lifecycle behave abnormally?" — Lifecycle events by transport class chart (initialize / shutdown / etc.).

Span filter

spring.ai.tool spans where mcp.transport is present and not in-process.

Controls

All dashboards share the Observability global settings — time window, refresh interval, custom range. MCP Servers has no tab-specific controls beyond those.

KPI cards — Volume & Quality (six)

Card Shows Source
MCP servers Number of registered external MCP servers McpClientService.registeredServers().size()
Servers up Number with last connection state OK Live ping / connection state
MCP tool calls Count of all externally-routed tool calls Spans with mcp.transport non-null
Distinct tools Unique tool names called externally set(spring.ai.tool.definition.name) filtered
p95 latency 95th-percentile external tool duration Span duration distribution
Error rate Percentage of external calls with status=ERROR Span status

KPI cards — OAuth State (four)

Card Shows Source
OAuth authorized Count of OAuth-protected servers currently in authorized state McpServerInfo.oauthStatus
OAuth awaiting Count awaiting authorization (user-driven OAuth dance not yet completed) OAuth state machine
OAuth errored / offline Count where OAuth flow has errored or the server is unreachable OAuth state machine + ping
OAuth expiring < 5 min Token-refresh urgency — these will fail soon if not refreshed Token expiry timestamp

Charts (seven)

Chart Type Reading
MCP calls / minute Line per transport, stacked Drop to zero on one transport → that transport class lost connectivity
Latency p50 / p95 / p99 Multi-line, ms (one per transport) stdio is consistently faster (no network); HTTP variants show round-trip cost
Top servers Horizontal bar, by call count Identifies the server carrying the most traffic
Top MCP tools Horizontal bar, by call count Same question scoped to specific tool names across servers
Transport mix Donut (stdio / streamable-http / sse) Sanity check against expected routing
Server status Stacked bar over time (OK / Error / Awaiting) Spot a server flipping in/out of healthy state
Lifecycle events by transport class Bar Unusual shutdown cluster → server crash loop

Tables

OAuth status grid — Server · Transport · Status · … — sorted by Status; expiring tokens highlighted. Click a row to navigate to the MCP Server connection page where you can re-authorize.

Cross-references

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