OSM Tag Key Overview: Usage by Object Type (Taginfo)

osmtaginfo/key-overview

Overview of one OpenStreetMap tag key (for example amenity, highway or building): how many OSM objects use it in total and as nodes, ways and relations, how many distinct values it has, how many users and projects use it, its most prevalent values with their shares, and its wiki description by language. Statistics are rebuilt from the OSM database about once a day. Data from OpenStreetMap contributors (ODbL), via OSM Taginfo; served by Eden Engine; not an official OpenStreetMap 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 $0.50.

Data source

OpenStreetMap

Data © OpenStreetMap contributors, available under the Open Database Licence (ODbL); statistics from OSM Taginfo (taginfo.openstreetmap.org). See openstreetmap.org/copyright. Served by Eden Engine; not an official OpenStreetMap 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.

Install it Create an account

agent

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

// 2. inspect: price and input schema
omnial_inspect({ tool: "osmtaginfo/key-overview" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "osmtaginfo/key-overview" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "osmtaginfo/key-overview", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "osmtaginfo/key-overview", 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 24, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "key"
  ],
  "properties": {
    "key": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1,
      "description": "OSM tag key, for example 'amenity', 'highway' or 'cuisine'."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "The upstream request URL."
    },
    "data": {
      "type": "object",
      "required": [
        "key",
        "counts"
      ],
      "properties": {
        "key": {
          "type": "string"
        },
        "users": {
          "type": "integer",
          "description": "Number of mappers who used the key."
        },
        "counts": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "type": {
                "type": "string"
              },
              "count": {
                "type": "integer"
              },
              "values": {
                "type": "integer",
                "description": "Number of distinct values (key overview only)."
              },
              "count_fraction": {
                "type": "number"
              }
            },
            "additionalProperties": true
          },
          "description": "Usage counts split by object type: all, nodes, ways and relations."
        },
        "has_map": {
          "type": "boolean"
        },
        "projects": {
          "type": "integer",
          "description": "Number of OSM-related projects using the key."
        },
        "wiki_pages": {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": true
          }
        },
        "description": {
          "type": "object",
          "description": "Wiki description by language code.",
          "additionalProperties": true
        },
        "prevalent_values": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "count": {
                "type": "integer"
              },
              "value": {
                "type": "string"
              },
              "fraction": {
                "type": "number"
              }
            },
            "additionalProperties": true
          },
          "description": "The most used values of the key."
        }
      },
      "additionalProperties": true
    },
    "total": {
      "type": "integer",
      "description": "Total number of results."
    },
    "data_until": {
      "type": "string",
      "description": "UTC time of the newest OSM change included in the statistics."
    }
  },
  "additionalProperties": true
}