schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "categories": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": { "type": "string" },
          "sections": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "name": { "type": "string" },
                "services": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "name": { "type": "string" },
                      "description": { "type": "string" },
                      "url": { "type": "string" },
                      "github": { "type": "string", "nullable": true },
                      "icon": { "type": "string", "nullable": true },
                      "followWith": { "type": "string", "nullable": true },
                      "securityAudited": { "type": "boolean", "nullable": true },
                      "openSource": { "type": "boolean", "nullable": true },
                      "acceptsCrypto": { "type": "boolean", "nullable": true },
                      "tosdrId": { "type": "number", "nullable": true },
                      "iosApp": { "type": "string", "nullable": true },
                      "androidApp": { "type": "string", "nullable": true },
                      "discordInvite": { "type": "string", "nullable": true },
                      "subreddit": { "type": "string", "nullable": true }
                    },
                    "required": ["name", "description", "url"],
                    "additionalProperties": false
                  }
                },
                "intro": { "type": "string", "nullable": true },
                "notableMentions": {
                  "oneOf": [
                    {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "name": { "type": "string" },
                          "description": { "type": "string" },
                          "url": { "type": "string" }
                        },
                        "required": ["name", "url"],
                        "additionalProperties": false
                      }
                    },
                    { "type": "string" }
                  ],
                  "nullable": true
                },
                "furtherInfo": { "type": "string", "nullable": true },
                "wordOfWarning": { "type": "string", "nullable": true },
                "alternativeTo": {
                  "type": "array",
                  "items": { "type": "string" },
                  "nullable": true
                }
              },
              "required": ["name", "services"],
              "additionalProperties": false
            }
          }
        },
        "required": ["name", "sections"],
        "additionalProperties": false
      }
    }
  },
  "required": ["categories"],
  "additionalProperties": false
}