opentopo.elevation.area
Get terrain elevation statistics (min, max, mean, range in metres) for a bounding box area using global DEM datasets. Maximum bounding box: 0.5° × 0.5° (~55km × 55km at equator). Returns min_m, max_m, mean_m, range_m, cell_count, valid_cells, nodata_cells, and resolution. Useful for hydrological ...
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What opentopo.elevation.area does on Apibase
AI agents call opentopo.elevation.area to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
east | number | Yes | Eastern boundary of bounding box in decimal degrees (must be > west) |
west | number | Yes | Western boundary of bounding box in decimal degrees (-180 to 180) |
north | number | Yes | Northern boundary of bounding box in decimal degrees (must be > south) |
south | number | Yes | Southern boundary of bounding box in decimal degrees (-90 to 90) |
dataset | string | — | Global DEM dataset to query. SRTMGL1 = NASA SRTM 30m (default, global). COP30 = Copernicus 30m (high accuracy). AW3D30 = ALOS World 3D 30m. NASADEM = NASA 30m r |
Parameters from the server's own tool schema.
Why opentopo.elevation.area is rated Low
Retrieves public geospatial elevation data without modification or side effects.
From the tool's definition Get terrain elevation statistics for bounding box area. Returns min, max, mean, range in metres.
Attacks that exploit this kind of access
The rule that runs opentopo.elevation.area safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For opentopo.elevation.area, this is the rule to start with:
opentopo.elevation.area is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Apibase, apply this rule, and every opentopo.elevation.area call is checked against it from then on.
Questions about opentopo.elevation.area
Get terrain elevation statistics (min, max, mean, range in metres) for a bounding box area using global DEM datasets. Maximum bounding box: 0.5° × 0.5° (~55km × 55km at equator). Returns min_m, max_m, mean_m, range_m, cell_count, valid_cells, nodata_cells, and resolution. Useful for hydrological analysis, terrain characterisation, and infrastructure siting. Source: OpenTopography / USGS 3DEP, CC BY 4.0, free registration (5K req/day). It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
opentopo.elevation.area accepts 5 parameters: east, west, north, south, dataset. Required: east, west, north, south. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for opentopo.elevation.area: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Apibase. Nothing to install.
opentopo.elevation.area is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the opentopo.elevation.area rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for opentopo.elevation.area. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
opentopo.elevation.area is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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