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GeoSpark
io.github.Maz2580/geospark in the official MCP registry.
Endpoint https://geospark.terrascout.app/mcp. Source: github.com/Maz2580/geospark.
The registry describes it as: Verifiable geospatial tools: distances, topology, isochrones, Overture Maps, with sources.
We read its 21 tools on 2026-10-27. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
calculate_distance check_spatial_relationship spatial_operation geocode reverse_geocode get_elevation route get_weather get_air_quality get_active_fires isochrone travel_time_matrix overture_features transform_coordinates convert_height sun_position sun_times terrain_horizon line_of_sight location_report select_site
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-github-maz2580-geospark)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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