MCP Server Monitoring
Continuously test your MCP servers and tools. Get alerted when authentication, tool discovery, tool execution, or dependencies fail.
Free MCP health check, no account needed. Continuous monitoring on every plan.
An online endpoint is not a working MCP server
Classic uptime monitoring sees HTTP 200 and moves on. MCP uptime monitoring has to go further, because agents break in ways a ping never notices:
- An expired token makes every tool call return 401 while the endpoint stays “up”.
- A deploy renames or drops a tool, and agents silently lose a capability.
- A downstream database or API fails, so tool calls error even though initialize succeeds.
- Tool discovery gets slow enough that clients time out before they see your tools.
How MCP monitoring works
- 1
Connect & initialize
Every check opens a fresh MCP session and performs the initialize handshake, authenticating with your bearer token.
- 2
Discover tools
We call tools/list, validate every tool definition, and record how many tools the server exposes.
- 3
Execute a tool
Optionally call one tool with your arguments and assert that the result contains the text you expect.
Try it now: free MCP health check
Paste your MCP server URL and see initialize, tool discovery, and latency results in seconds. No account required.
Run the free MCP health checkWhat an MCP health check verifies
Reachability & TLS
DNS, TLS, and HTTP response from your MCP endpoint.
Authentication
Bearer tokens are tested on every run, so expiry is caught immediately.
MCP initialize
Protocol handshake and version negotiation succeed.
Tool discovery
tools/list works and returns parseable tool definitions.
Tool execution
MCP tool monitoring: a real tools/call, so failing dependencies surface.
Latency
End-to-end timing with an optional maximum acceptable latency.
What you see in Nexio Watch
My Production MCP Status ✓ Operational Last check 24 seconds ago Latency 184 ms Tools 12 discovered Tool check get_customer ✓ Uptime 99.98%
Clear failure reasons
When a check fails, you see exactly which step broke, not just “down”.
CONNECTION_FAILED· Connection failedTIMEOUT· Timed outAUTHENTICATION_FAILED· Authentication failedINITIALIZATION_FAILED· Initialization failedTOOLS_LIST_FAILED· tools/list failedTOOL_NOT_FOUND· Tool not foundTOOL_CALL_FAILED· Tool call failedASSERTION_FAILED· Assertion failedINVALID_MCP_RESPONSE· Invalid MCP response
Alerts and status pages you already use
MCP monitors use the same uptime history, incidents, alert routing, and status pages as every other Nexio Watch monitor. Get notified by email, Slack, SMS, Discord, Telegram, or webhook.
- Slack
- SMS
- Discord
- Telegram
- Webhooks
- Status pages
MCP monitoring FAQ
What is MCP server monitoring?
MCP server monitoring regularly connects to your Model Context Protocol server as a client would, checks that initialize and tools/list succeed, and optionally calls a tool, alerting you when any step fails.
Which MCP transports are supported?
Remote MCP servers using the Streamable HTTP transport, the current standard for remote Model Context Protocol servers. Responses can be plain JSON or server-sent events. Local stdio servers can't be reached over the internet.
How do you handle authentication?
You can add a bearer token that is sent as an Authorization header. Tokens are encrypted at rest, never shown again after saving, and never written to logs or analytics.
Will monitoring call my tools with side effects?
Only if you choose a tool. Tool execution is optional, and we recommend a read-only tool with test arguments, such as looking up a dedicated monitoring record.
How is this different from HTTP uptime monitoring?
An HTTP check only proves the endpoint answers. MCP monitoring proves the protocol handshake, tool discovery, and real tool execution work, which is what your AI agents actually depend on.