Stratigraphic Column at a Point (Macrostrat)

macrostrat/columns-at-point

The Macrostrat stratigraphic column that covers a latitude and longitude: its column id and name, the column group, the column's centroid latitude and longitude, its area, type and status, and the literature references behind it. Use the column id with the Macrostrat units tool to see the rock units. An empty list means no column matched. Macrostrat data under CC BY 4.0, passed through and served by Eden Engine; not an official Macrostrat product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

Macrostrat

Data from Macrostrat (macrostrat.org), licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Credit Macrostrat as the data source; the response wrapper is removed and nothing else is changed. Served by Eden Engine; not an official Macrostrat product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "macrostrat/columns-at-point" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "macrostrat/columns-at-point" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "macrostrat/columns-at-point", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "macrostrat/columns-at-point", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 20, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "lat",
    "lng"
  ],
  "properties": {
    "lat": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Latitude in decimal degrees, north positive (for example 43)."
    },
    "lng": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Longitude in decimal degrees, west negative (for example -89)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "v": {
      "type": "integer",
      "description": "Macrostrat API version."
    },
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "lat": {
            "type": "string",
            "description": "Latitude of the column centroid, as a string."
          },
          "lng": {
            "type": "string",
            "description": "Longitude of the column centroid, as a string."
          },
          "refs": {
            "type": "array",
            "items": {
              "type": "integer"
            },
            "description": "Reference ids, keyed in the top-level `refs` object."
          },
          "col_id": {
            "type": "integer",
            "description": "Macrostrat column id."
          },
          "col_area": {
            "type": "string",
            "description": "Area of the column, as a string."
          },
          "col_name": {
            "type": "string"
          },
          "col_type": {
            "type": "string",
            "description": "For example column."
          },
          "col_group": {
            "type": "string",
            "description": "Name of the column group."
          },
          "project_id": {
            "type": "integer"
          },
          "status_code": {
            "type": "string",
            "description": "For example active."
          },
          "col_group_id": {
            "type": "integer"
          },
          "group_col_id": {
            "type": "string",
            "description": "The column's id within its group."
          }
        },
        "additionalProperties": true
      },
      "description": "The columns for the point. Empty when nothing matched."
    },
    "refs": {
      "type": "object",
      "description": "Literature citations, keyed by the reference ids used in `data`.",
      "additionalProperties": {
        "type": "string"
      }
    },
    "license": {
      "type": "string",
      "description": "The data licence, CC-BY 4.0."
    }
  },
  "description": "Macrostrat's response with its outer wrapper removed.",
  "additionalProperties": true
}