diff --git a/api/CharacterData.json b/api/CharacterData.json
new file mode 100644
index 00000000000000..bcf93b6ed6a2c9
--- /dev/null
+++ b/api/CharacterData.json
@@ -0,0 +1,438 @@
+{
+  "api": {
+    "CharacterData": {
+      "__compat": {
+        "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData",
+        "support": {
+          "chrome": {
+            "version_added": "1"
+          },
+          "chrome_android": {
+            "version_added": true
+          },
+          "edge": {
+            "version_added": true
+          },
+          "edge_mobile": {
+            "version_added": true
+          },
+          "firefox": {
+            "version_added": "1"
+          },
+          "firefox_android": {
+            "version_added": true
+          },
+          "ie": {
+            "version_added": "6"
+          },
+          "opera": {
+            "version_added": true
+          },
+          "opera_android": {
+            "version_added": true
+          },
+          "safari": {
+            "version_added": true
+          },
+          "safari_ios": {
+            "version_added": true
+          },
+          "webview_android": {
+            "version_added": true
+          }
+        },
+        "status": {
+          "experimental": false,
+          "standard_track": true,
+          "deprecated": false
+        }
+      },
+      "ChildNode": {
+        "__compat": {
+          "description": "Implements <a href='https://developer.mozilla.org//docs/Web/API/ChildNode'><code>ChildNode</code></a> Interface",
+          "support": {
+            "chrome": {
+              "version_added": true
+            },
+            "chrome_android": {
+              "version_added": true
+            },
+            "edge": {
+              "version_added": true
+            },
+            "edge_mobile": {
+              "version_added": true
+            },
+            "firefox": {
+              "version_added": "25",
+              "notes": "Two properties, <code>nextElementSibling</code> and <code>previousElementSibling</code>, have been moved to the <a href='https://developer.mozilla.org/docs/Web/API/NonDocumentTypeChildNode><code>NonDocumentTypeChildNode</code></a> interface, also implemented by <code>CharacterData</code>."
+            },
+            "firefox_android": {
+              "version_added": "25",
+              "notes": "Two properties, <code>nextElementSibling</code> and <code>previousElementSibling</code>, have been moved to the <a href='https://developer.mozilla.org/docs/Web/API/NonDocumentTypeChildNode'><code>NonDocumentTypeChildNode</code></a> interface, also implemented by <code>CharacterData</code>."
+            },
+            "ie": {
+              "version_added": false
+            },
+            "opera": {
+              "version_added": true
+            },
+            "opera_android": {
+              "version_added": true
+            },
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": false,
+            "deprecated": false
+          }
+        }
+      },
+      "appendData": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/appendData",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "data": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/data",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "deleteData": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/deleteData",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "insertData": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/insertData",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "length": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/length",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "replaceData": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/replaceData",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "substringData": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CharacterData/substringData",
+          "support": {
+            "chrome": {
+              "version_added": null
+            },
+            "chrome_android": {
+              "version_added": null
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": null
+            },
+            "firefox_android": {
+              "version_added": null
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": null
+            },
+            "opera_android": {
+              "version_added": null
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      }
+    }
+  }
+}