io.github.THORCollective/hearth

HEARTH

Is the HEARTH MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-11.

Search community threat hunting hypotheses by keyword, threat actor, or the log sources you have.

alive probed 2026-11-14 · unchanged since 2026-11-11

4tools

1.7ktokens in Claude Opus 5.5

0.9 %of Claude's 200k window

0.7×the median server

515 msto initialize

13 msto list tools

Run it: npx -y @thorcollective/hearth-mcp@0.1.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: hearth 0.1.1
Capabilities: tools
Instructions: 364 characters
Of a 1M window: 0.2 % of a 1M context window
Count: 1.7k tokens in Claude Opus 5.5, exact, measured 2026-11-10. With the Claude Code prefix mcp__…__ on each tool name: 1.8k. The o200k_base estimate is 967. Counted again when the tool definitions change. Method.
Repository: https://github.com/THORCollective/HEARTH
Website: https://hearth.thorcollective.com
Registry: active, updated 2026-11-10 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.78×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
hunts_for_datasources	531	299	31 %
search_hunts	496	279	29 %
hunts_for_actor	464	261	27 %
get_hunt	227	128	13 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention hearth.

Hearth rsvp.hearth/hearth · needs auth
Ensemble dev.hearthbyte/ensemble · alive
io.github.gregario/hearthstone-oracle · crashed on start
Hearth: x402 Pay-Safety & Discovery io.sslip.138-197-15-135/hearth-onchain · refused
Hearth com.protoductai/hearth · needs auth

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.