explain.json

{
  "explain": {
    "documentation": {
      "url": "https://www.elastic.co/guide/en/elasticsearch/reference/master/search-explain.html",
      "description": "Returns information about why a specific matches (or doesn't match) a query."
    },
    "stability": "stable",
    "visibility": "public",
    "headers": {
      "accept": ["application/json"],
      "content_type": ["application/json"]
    },
    "url": {
      "paths": [
        {
          "path": "/{index}/_explain/{id}",
          "methods": ["GET", "POST"],
          "parts": {
            "id": {
              "type": "string",
              "description": "The document ID"
            },
            "index": {
              "type": "string",
              "description": "The name of the index"
            }
          }
        }
      ]
    },
    "params": {
      "analyze_wildcard": {
        "type": "boolean",
        "description": "Specify whether wildcards and prefix queries in the query string query should be analyzed (default: false)"
      },
      "analyzer": {
        "type": "string",
        "description": "The analyzer for the query string query"
      },
      "default_operator": {
        "type": "enum",
        "options": ["AND", "OR"],
        "default": "OR",
        "description": "The default operator for query string query (AND or OR)"
      },
      "df": {
        "type": "string",
        "description": "The default field for query string query (default: _all)"
      },
      "stored_fields": {
        "type": "list",
        "description": "A comma-separated list of stored fields to return in the response"
      },
      "lenient": {
        "type": "boolean",
        "description": "Specify whether format-based query failures (such as providing text to a numeric field) should be ignored"
      },
      "preference": {
        "type": "string",
        "description": "Specify the node or shard the operation should be performed on (default: random)"
      },
      "q": {
        "type": "string",
        "description": "Query in the Lucene query string syntax"
      },
      "routing": {
        "type": "string",
        "description": "Specific routing value"
      },
      "_source": {
        "type": "list",
        "description": "True or false to return the _source field or not, or a list of fields to return"
      },
      "_source_excludes": {
        "type": "list",
        "description": "A list of fields to exclude from the returned _source field"
      },
      "_source_includes": {
        "type": "list",
        "description": "A list of fields to extract and return from the _source field"
      }
    },
    "body": {
      "description": "The query definition using the Query DSL"
    }
  }
}