> ## Documentation Index
> Fetch the complete documentation index at: https://docs.closient.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Resolve a coordinate to a country

> Resolves `lat`/`lon` to an ISO 3166-1 alpha-2 country with the same offline point-in-polygon rule Closient's own store importers use (Natural Earth admin-0, no third-party call). Use it to earn `country_derived: true` on a store row: send the returned `country` as the row's `country` and set `country_derived` only when `method` is not `none` and `flagged` is false.

A coordinate that resolves to nothing is a successful `200` with `country: null` and `method: none`, not an error.



## OpenAPI

````yaml /openapi/openapi-locations.json get /locations/api/v1/countries/resolve
openapi: 3.1.0
info:
  title: Locations API
  version: 1.0.0
  description: >
    Location management for physical stores.


    ## Authentication


    All endpoints require an API key passed via the `X-API-Key` HTTP header,
    unless otherwise noted.


    ```

    X-API-Key: csb_<body>_<checksum>

    ```


    Generate API keys in **Settings > API Keys** in your dashboard, or via the
    Account API.

    Session-based (cookie) authentication is also accepted for browser-based
    access.


    ## Rate Limits


    | Tier        | Requests / minute | Requests / day |

    |-------------|-------------------|----------------|

    | Default     | 300               | 10,000         |

    | Custom      | Contact us        | Contact us     |


    Rate-limit headers are included on every response so callers can
    self-throttle without

    hitting our 429s ("informed governor"):


    - `RateLimit-Policy` — every active window, e.g. `300;w=60, 10000;w=86400`

    - `RateLimit-Limit` — quota for the **most-restrictive** currently-active
    window

    - `RateLimit-Remaining` — requests left in that window

    - `RateLimit-Reset` — seconds until that window resets (relative; clock-skew
    safe)


    Legacy `X-RateLimit-*` aliases are also emitted for back-compat.
    `X-RateLimit-Reset`

    keeps the absolute Unix-timestamp shape to avoid breaking existing
    consumers.


    When rate-limited, you receive `429 Too Many Requests` with a
    `retry_after_seconds` field

    in the error envelope and a `Retry-After` header.


    ## Pagination


    List endpoints return paginated results in this envelope:


    ```json

    {
      "data": [...],
      "pagination": {
        "page": 1,
        "page_size": 25,
        "total_count": 342,
        "total_pages": 14,
        "has_next": true,
        "has_previous": false
      }
    }

    ```


    Use `?page=2&page_size=50` query parameters. Maximum page size is 100.


    ## Error Responses


    All errors conform to [RFC 9457 Problem
    Details](https://www.rfc-editor.org/rfc/rfc9457)

    with `Content-Type: application/problem+json`:


    ```json

    {
      "type": "https://closient.com/docs/errors/not_found",
      "title": "Not Found",
      "status": 404,
      "detail": "The requested resource was not found.",
      "error_code": "not_found",
      "retryable": false,
      "timestamp": "2026-03-31T12:00:00+00:00"
    }

    ```


    Common error codes: `unauthorized` (401), `forbidden` (403), `not_found`
    (404),

    `validation_error` (422), `rate_limited` (429), `internal_error` (500).
  termsOfService: https://www.closient.com/terms/
servers:
  - url: https://www.closient.com
security: []
tags:
  - name: Locations
    description: Manage physical store locations.
  - name: Countries
    description: Resolve coordinates to countries.
  - name: Store Locator (Public)
    description: Public endpoints for the embeddable store locator widget.
externalDocs:
  description: Closient Documentation
  url: https://docs.closient.com
paths:
  /locations/api/v1/countries/resolve:
    get:
      tags:
        - Countries
      summary: Resolve a coordinate to a country
      description: >-
        Resolves `lat`/`lon` to an ISO 3166-1 alpha-2 country with the same
        offline point-in-polygon rule Closient's own store importers use
        (Natural Earth admin-0, no third-party call). Use it to earn
        `country_derived: true` on a store row: send the returned `country` as
        the row's `country` and set `country_derived` only when `method` is not
        `none` and `flagged` is false.


        A coordinate that resolves to nothing is a successful `200` with
        `country: null` and `method: none`, not an error.
      operationId: apps_locations_api_countries_resolve_country_from_coordinate
      parameters:
        - in: query
          name: lat
          schema:
            description: Latitude in decimal degrees, WGS 84 / EPSG:4326.
            maximum: 90
            minimum: -90
            title: Lat
            type: number
          required: true
          description: Latitude in decimal degrees, WGS 84 / EPSG:4326.
        - in: query
          name: lon
          schema:
            description: Longitude in decimal degrees, WGS 84 / EPSG:4326.
            maximum: 180
            minimum: -180
            title: Lon
            type: number
          required: true
          description: Longitude in decimal degrees, WGS 84 / EPSG:4326.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CountryResolveOut'
        '400':
          description: Bad Request
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '401':
          description: Unauthorized
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '403':
          description: Forbidden
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '404':
          description: Not Found
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '405':
          description: Method Not Allowed
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '422':
          description: Unprocessable Content
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '429':
          description: Too Many Requests
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
      security:
        - APIKeyHeaderAuth: []
        - OAuthTokenAuth: []
        - CookieGatedSessionAuth: []
components:
  schemas:
    CountryResolveOut:
      examples:
        - country: CA
          country_name: Canada
          flagged: false
          method: polygon
          reason: ''
      properties:
        country:
          anyOf:
            - description: >-
                ISO 3166-1 alpha-2 country code (``US``, ``CA``, ``GB``).
                Case-insensitive on input and normalized to upper case;
                unassigned codes are rejected with a 422.
              format: iso3166-alpha2
              maxLength: 2
              minLength: 2
              pattern: ^[A-Za-z]{2}$
              type: string
            - type: 'null'
          description: >-
            ISO 3166-1 alpha-2 country the coordinate falls in, or `null` when
            the coordinate is in no country and no land is within the fallback
            distance, or when the polygon is sovereignty-indeterminate. `null`
            is never a default: reject or hold the row.
          title: Country
        country_name:
          default: ''
          description: >-
            Natural Earth's name for the matched feature; empty when `country`
            is null.
          title: Country Name
          type: string
        method:
          description: >-
            How the answer was reached: `polygon` (the point is inside a
            country), `nearest_polygon` (the point is at sea and was attributed
            to land within `distance_km`) or `none`.
          title: Method
          type: string
        flagged:
          description: >-
            True when a human should look at this answer first: a micro-state,
            or a contested border region where the dataset's editorial choice is
            one of several defensible ones. When you also hold a source label
            for the row, prefer the label for a flagged answer rather than
            asserting `country_derived`.
          title: Flagged
          type: boolean
        reason:
          default: ''
          description: Why the answer is flagged or unresolved; empty otherwise.
          title: Reason
          type: string
        distance_km:
          anyOf:
            - type: number
            - type: 'null'
          description: >-
            Distance to the attributed land in kilometres. Set only for
            `nearest_polygon`.
          title: Distance Km
      required:
        - method
        - flagged
      title: CountryResolveOut
      type: object
    ErrorOut:
      description: |-
        RFC 9457 Problem Details response.

        All API errors are returned in this format with Content-Type:
        application/problem+json.
      examples:
        - detail: The requested resource was not found.
          error_code: not_found
          retryable: false
          status: 404
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Not Found
          type: https://closient.com/docs/errors/not_found
        - detail: Validation error.
          details:
            - loc:
                - body
                - name
              msg: Field required
              type: missing
          error_code: validation_error
          retryable: false
          status: 422
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Validation Error
          type: https://closient.com/docs/errors/validation_error
        - detail: Rate limit exceeded. Please try again later.
          error_code: rate_limited
          retry_after: 31
          retryable: true
          status: 429
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Rate Limited
          type: https://closient.com/docs/errors/rate_limited
      properties:
        type:
          description: URI reference identifying the error type.
          title: Type
          type: string
        title:
          description: Short human-readable summary of the error.
          title: Title
          type: string
        status:
          description: HTTP status code.
          title: Status
          type: integer
        detail:
          description: Human-readable explanation of this specific occurrence.
          title: Detail
          type: string
        error_code:
          description: Machine-readable error code (e.g. not_found, unauthorized).
          title: Error Code
          type: string
        retryable:
          default: false
          description: Whether retrying the same request can succeed.
          title: Retryable
          type: boolean
        timestamp:
          description: ISO 8601 timestamp of when the error occurred.
          title: Timestamp
          type: string
        retry_after:
          anyOf:
            - type: integer
            - type: 'null'
          description: Seconds to wait before retrying (when applicable).
          title: Retry After
        owner_action_required:
          anyOf:
            - type: boolean
            - type: 'null'
          description: Whether the error requires account owner intervention.
          title: Owner Action Required
        details:
          description: Additional context (validation errors, etc.).
          title: Details
      required:
        - type
        - title
        - status
        - detail
        - error_code
        - timestamp
      title: ErrorOut
      type: object
  securitySchemes:
    APIKeyHeaderAuth:
      type: apiKey
      in: header
      name: X-API-Key
    OAuthTokenAuth:
      type: http
      scheme: bearer
    CookieGatedSessionAuth:
      type: apiKey
      in: cookie
      name: sessionid

````

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