healthchecks-mcpCron monitoring, in the conversation

MCP server for Healthchecks — inspect, create and adjust cron and uptime checks, and read why one failed

Answers why it failed
get_ping_body returns the output a job POSTed when it reported failure — the stack trace, not just the red dot. list_flips gives the history behind the current status, narrowed to a time window.
Read-only keys work properly
Healthchecks hands a read-only key a different object — a unique_key where a uuid would be, and no ping URLs at all. Checks are addressable by either, and get_api_key_info reports up front which kind of key is configured and which tools it cannot reach.
Only the tools you want
HEALTHCHECKS_READ_ONLY=true registers the read tools and nothing else. HEALTHCHECKS_ALLOW_TOOLS cuts finer — essential for a curated handful, your own comma-separated list, or a whole family with list_* — and HEALTHCHECKS_DENY_TOOLS subtracts. Whatever is filtered out does not exist on the protocol rather than failing when called, and a name that matches no tool stops the server at startup instead of quietly going missing.
Safe by default
Destructive tools need a server-issued confirmation token, upstream content is marked untrusted, and read-only mode simply does not register the write tools.

The server only reads and writes checks. The pings that keep them green come from the jobs themselves, on a path this server is deliberately not on.

Fourteen tools, or seven

The tool list is not fixed. HEALTHCHECKS_ALLOW_TOOLS=essential narrows it to the seven that cover the job end to end, and a name that matches nothing stops the server instead of quietly leaving a tool out of tools/list.

Listing the tools, narrowing them to the essential preset, and the startup abort a mistyped tool name produces

Recorded from docs/demo.tape with no credentials at all — the server starts without an API key so that registries and inspectors can introspect it.

healthchecks-mcpCron monitoring, in the conversation

Answers why it failed

Read-only keys work properly

Only the tools you want

Safe by default

Fourteen tools, or seven ​

Fourteen tools, or seven