json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "description": "schema for index of machine-readable issuer JSON URLs",
      "id": "http://www.healthcare.gov/schemas/v1/issuer-index#",
      "properties": {
          "formulary_urls": {
              "items": {
                  "_format": "uri",
                  "type": "string"
              },
              "type": "array"
          },
          "plan_urls": {
              "items": {
                  "_format": "uri",
                  "type": "string"
              },
              "minItems": 1,
              "type": "array"
          },
          "provider_urls": {
              "items": {
                  "_format": "uri",
                  "type": "string"
              },
              "minItems": 1,
              "type": "array"
          }
      },
      "required": [
          "provider_urls",
          "formulary_urls",
          "plan_urls"
      ],
      "type": "object"
  }