macrostrat-mcp

Explore global geologic data to answer questions about bedrock, formations, ages, and stratigraphy.

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What it can do

  • Find Columns: Find geological stratigraphic columns, rock layers, and geological history for any location worldwide. Use for geology, bedrock, formations, age dating, and stratigraphic analysis.
  • Find Units: Find geological rock units, formations, bedrock geology, and mineral information for any location worldwide. Use for geology questions, rock types, age dating, lithology, and geological an
  • Defs: Routes giving access to standard fields and dictionaries used in Macrostrat

What data it sees

Do you need an account

No: the server works without sign-in

Explore global geologic data to answer questions about bedrock, formations, ages, and stratigraphy. Retrieve units, columns, minerals, timescales, and definitions for any location to build accurate geological context. Generate geology map tiles for quick visualization of areas of interest.

How to connect

How to connect macrostrat-mcp to Claude

The server address to paste into Claude settings:

https://macrostrat-mcp--blake365.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect macrostrat-mcp to ChatGPT

The server address to paste into ChatGPT settings:

https://macrostrat-mcp--blake365.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect macrostrat-mcp to Cursor

The server address to paste into Cursor settings:

https://macrostrat-mcp--blake365.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (8)

Raw names from tools/list. Only developers need these.

find-columnsFind geological stratigraphic columns, rock layers, and geological history for any location worldwide. Use for geology, bedrock, formations, age dating, and stratigraphic analysis.
find-unitsFind geological rock units, formations, bedrock geology, and mineral information for any location worldwide. Use for geology questions, rock types, age dating, lithology, and geological analysis.
defsRoutes giving access to standard fields and dictionaries used in Macrostrat
defs-autocompleteQuickly retrieve all definitions matching a query. Limited to 100 results
mineral-infoGet information about a mineral, use one property
timescaleGet information about a time period
lat-lng-to-tileConvert latitude/longitude coordinates to map tile coordinates (x, y) for a given zoom level. Uses the same web mercator projection as MapKit.
map-tilesGet map tile URLs from the Macrostrat tiles server. Use lat-lng-to-tile tool first to get proper x,y coordinates. Defaults to 'carto' scale which automatically adapts detail level to zoom.