-   **Binary data:** JSON is a text serialization method, and it takes
    up the “payload” area of each HTTP request, so there is no
    reasonable way to include binary data in the JSON message without
    some sort of codec like Base64, for which there is no provision in
    the current JSON API. You will therefore find no JSON API for
    committing changes to a file in the repository, for example. Other
    Fossil APIs such as [`/raw`](/help?cmd=/raw) or
    Fossil APIs such as [`/raw`](/help/www/raw) or
    [`/fileedit`](../fileedit-page.md) may serve you better.
-   **64-bit integers:** The JSON standard does not specify integer precision,
    because it targets many different platforms, and not all of
    them can support more than 32 bits. JavaScript (from which JSON
    derives) supports 53 bits of integer precision, which may affect how
    a given client-side JSON implementation sends large integers to Fossil’s JSON
    API. Our JSON parser can cope with integers larger than 32 bits on input, and it