Safecast Radiation Measurements Near a Latitude and Longitude

safecast/measurements-near

Radiation measurements from the volunteer Safecast network taken within a radius of a latitude and longitude, 25 per page: value and unit (counts per minute), capture time, position, device id and detector height. Optionally only readings captured on or after a date. Coverage is densest in Japan. Order is not strictly by time and the radius can be up to 100 km. An area with no readings returns an empty list. Slow queries can take several seconds. Safecast data under CC0, passed through unmodified and served by Eden Engine; not an official Safecast 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

Safecast

Data from Safecast, the volunteer radiation monitoring network, published under CC0 (safecast.org/data). Attribution is not required and is appreciated: credit Safecast. Served by Eden Engine; not an official Safecast 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.

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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: "safecast/measurements-near" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "safecast/measurements-near" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "safecast/measurements-near", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "safecast/measurements-near", input: { /* ... */ } })

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

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "latitude",
    "longitude"
  ],
  "properties": {
    "page": {
      "type": "integer",
      "default": 1,
      "maximum": 1000,
      "minimum": 1,
      "description": "Page number, 25 readings per page. Defaults to 1."
    },
    "distance": {
      "type": "integer",
      "default": 10000,
      "maximum": 100000,
      "minimum": 1,
      "description": "Search radius in metres, 1 to 100000. Defaults to 10000."
    },
    "latitude": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Centre latitude in decimal degrees, for example 37.42 (near Fukushima)."
    },
    "longitude": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Centre longitude in decimal degrees, for example 141.03."
    },
    "captured_after": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
      "description": "Only readings captured after this date, YYYY-MM-DD, for example 2026-01-01. Leave out for all dates. Queries with a date can be slower."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "results"
  ],
  "properties": {
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "value",
          "unit",
          "captured_at",
          "latitude",
          "longitude"
        ],
        "properties": {
          "id": {
            "type": "integer",
            "description": "The measurement id."
          },
          "unit": {
            "type": "string",
            "description": "The unit of `value`; cpm is counts per minute of the detector. A conversion to dose rate depends on the detector."
          },
          "value": {
            "type": "number",
            "description": "The reading, in `unit`."
          },
          "height": {
            "type": [
              "number",
              "null"
            ],
            "description": "Height of the detector above ground in centimetres, where reported."
          },
          "latitude": {
            "type": "number"
          },
          "device_id": {
            "type": [
              "integer",
              "null"
            ],
            "description": "The id of the device that took the reading."
          },
          "longitude": {
            "type": "number"
          },
          "captured_at": {
            "type": "string",
            "description": "When the reading was taken, ISO 8601 UTC."
          },
          "location_name": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": true
      }
    }
  },
  "description": "One page of readings, in `results`. Empty when nothing was measured in the radius.",
  "additionalProperties": true
}