OpenSearch/rest-api-spec/api/indices.get_field_mapping.json

{
  "indices.get_field_mapping": {
    "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-get-field-mapping.html",
    "methods": ["GET"],
    "url": {
      "path": "/_mapping/field/{field}",
      "paths": ["/_mapping/field/{field}", "/{index}/_mapping/field/{field}", "/{index}/{type}/_mapping/field/{field}"],
      "parts": {
        "index": {
          "type" : "list",
          "description" : "A comma-separated list of index names"
        },
        "type": {
          "type" : "list",
          "description" : "A comma-separated list of document types"
        },
        "field": {
          "type" : "list",
          "description" : "A comma-separated list of fields",
          "required" : true
        }
      },
      "params": {
        "include_defaults": {
          "type" : "boolean",
          "description" : "Whether the default mapping values should be returned as well"
        }
      }
    },
    "body": null
  }
}