diff --git a/c-sharp/Projects/ParatextProjectDataProvider.cs b/c-sharp/Projects/ParatextProjectDataProvider.cs
index a50335e4e2..ac3dc94f8a 100644
--- a/c-sharp/Projects/ParatextProjectDataProvider.cs
+++ b/c-sharp/Projects/ParatextProjectDataProvider.cs
@@ -20,6 +20,9 @@ ProjectDetails projectDetails
         Getters.Add("getChapterUSFM", GetChapterUSFM);
         Setters.Add("setChapterUSFM", SetChapterUSFM);
         Getters.Add("getVerseUSFM", GetVerseUSFM);
+
+        Getters.Add("getChapterUSX", GetChapterUSX);
+        Setters.Add("setChapterUSX", SetChapterUSX);
     }
 
     protected override Task StartDataProvider()
@@ -61,6 +64,7 @@ private ResponseToRequest Set(string dataType, string dataQualifier, string data
         return _paratextPsi.SetProjectData(scope, data);
     }
 
+    #region USFM handling methods
     private ResponseToRequest GetBookUSFM(string jsonString)
     {
         return Get(ParatextProjectStorageInterpreter.BookUSFM, jsonString);
@@ -80,4 +84,17 @@ private ResponseToRequest SetChapterUSFM(string dataQualifier, string data)
     {
         return Set(ParatextProjectStorageInterpreter.ChapterUSFM, dataQualifier, data);
     }
+    #endregion
+
+    #region USX handling methods
+    private ResponseToRequest GetChapterUSX(string jsonString)
+    {
+        return Get(ParatextProjectStorageInterpreter.ChapterUSX, jsonString);
+    }
+
+    private ResponseToRequest SetChapterUSX(string dataQualifier, string data)
+    {
+        return Set(ParatextProjectStorageInterpreter.ChapterUSX, dataQualifier, data);
+    }
+    #endregion
 }
diff --git a/c-sharp/Projects/ParatextProjectStorageInterpreter.cs b/c-sharp/Projects/ParatextProjectStorageInterpreter.cs
index 07a7204e06..f7eb8c2f85 100644
--- a/c-sharp/Projects/ParatextProjectStorageInterpreter.cs
+++ b/c-sharp/Projects/ParatextProjectStorageInterpreter.cs
@@ -1,9 +1,18 @@
+using System.Net.Http.Json;
 using System.Text;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Text.RegularExpressions;
+using System.Xml;
+using System.Xml.Linq;
+using System.Xml.XPath;
 using Newtonsoft.Json;
 using Paranext.DataProvider.JsonUtils;
 using Paranext.DataProvider.MessageHandlers;
 using Paranext.DataProvider.MessageTransports;
 using Paratext.Data;
+using PtxUtils;
+using SIL.Scripture;
 
 namespace Paranext.DataProvider.Projects;
 
@@ -12,6 +21,7 @@ internal class ParatextProjectStorageInterpreter : ProjectStorageInterpreter
     public const string BookUSFM = "BookUSFM";
     public const string ChapterUSFM = "ChapterUSFM";
     public const string VerseUSFM = "VerseUSFM";
+    public const string ChapterUSX = "ChapterUSX";
 
     public ParatextProjectStorageInterpreter(PapiClient papiClient)
         : base(ProjectStorageType.ParatextFolders, new[] { ProjectType.Paratext }, papiClient) { }
@@ -88,21 +98,25 @@ public override ResponseToRequest GetProjectData(ProjectDataScope scope)
         {
             BookUSFM
                 => string.IsNullOrEmpty(error)
-                    ? ResponseToRequest.Succeeded(scrText.GetText(verseRef, false, false))
+                    ? ResponseToRequest.Succeeded(scrText.GetText(verseRef, false, true))
                     : ResponseToRequest.Failed(error),
             ChapterUSFM
                 => string.IsNullOrEmpty(error)
-                    ? ResponseToRequest.Succeeded(scrText.GetText(verseRef, true, false))
+                    ? ResponseToRequest.Succeeded(scrText.GetText(verseRef, true, true))
                     : ResponseToRequest.Failed(error),
             VerseUSFM
                 => string.IsNullOrEmpty(error)
                     ? ResponseToRequest.Succeeded(scrText.Parser.GetVerseUsfmText(verseRef))
                     : ResponseToRequest.Failed(error),
+            ChapterUSX
+                => string.IsNullOrEmpty(error)
+                    ? ResponseToRequest.Succeeded(GetChapterUsx(scrText, verseRef))
+                    : ResponseToRequest.Failed(error),
             _ => ResponseToRequest.Failed($"Unknown data type: {scope.DataType}")
         };
     }
 
-    public override ResponseToRequest SetProjectData(ProjectDataScope scope, string data)
+    public override ResponseToRequest SetProjectData(ProjectDataScope scope, JsonNode data)
     {
         if (scope.ProjectID == null)
             return ResponseToRequest.Failed("Must provide a project ID");
@@ -128,13 +142,23 @@ public override ResponseToRequest SetProjectData(ProjectDataScope scope, string
                             verseRef.BookNum,
                             verseRef.ChapterNum,
                             false,
-                            data,
+                            data.ToString(),
                             writeLock
                         );
                     }
                 );
                 // The value of returned string is case sensitive and cannot change unless data provider subscriptions change
                 return ResponseToRequest.Succeeded(ChapterUSFM);
+            case ChapterUSX:
+                if (!string.IsNullOrEmpty(error))
+                    return ResponseToRequest.Failed(error);
+                ResponseToRequest? response = null;
+                RunWithinLock(
+                    WriteScope.ProjectText(scrText, verseRef.BookNum, verseRef.ChapterNum),
+                    writeLock =>
+                        response = SetChapterUsx(scrText, verseRef, data.ToString(), writeLock)
+                );
+                return response ?? ResponseToRequest.Failed("Unknown error occurred");
             default:
                 return ResponseToRequest.Failed($"Unknown data type: {scope.DataType}");
         }
@@ -157,7 +181,7 @@ public override ResponseToRequest GetExtensionData(ProjectDataScope scope)
         return ResponseToRequest.Succeeded(textReader.ReadToEnd());
     }
 
-    public override ResponseToRequest SetExtensionData(ProjectDataScope scope, string data)
+    public override ResponseToRequest SetExtensionData(ProjectDataScope scope, JsonNode data)
     {
         if (scope.ProjectID == null)
             return ResponseToRequest.Failed("Must provide a project ID");
@@ -181,7 +205,7 @@ public override ResponseToRequest SetExtensionData(ProjectDataScope scope, strin
                         throw new Exception("Write lock is not active");
                     dataStream.SetLength(0);
                     using TextWriter textWriter = new StreamWriter(dataStream, Encoding.UTF8);
-                    textWriter.Write(data);
+                    textWriter.Write(data.ToString());
                     textWriter.Flush();
                 }
             );
@@ -204,6 +228,69 @@ public override ResponseToRequest SetExtensionData(ProjectDataScope scope, strin
         );
     }
 
+    private string GetChapterUsx(ScrText scrText, VerseRef vref)
+    {
+        XmlDocument usx = ConvertUsfmToUsx(
+            scrText,
+            scrText.GetText(vref, true, true),
+            vref.BookNum
+        );
+        return usx.OuterXml ?? string.Empty;
+    }
+
+    private ResponseToRequest SetChapterUsx(
+        ScrText scrText,
+        VerseRef vref,
+        string newUsx,
+        WriteLock writeLock
+    )
+    {
+        try
+        {
+            XDocument doc;
+            using (TextReader reader = new StringReader(newUsx))
+                doc = XDocument.Load(reader, LoadOptions.PreserveWhitespace);
+
+            if (doc.Root?.Name != "usx")
+                return ResponseToRequest.Failed("Invalid USX");
+
+            UsxFragmenter.FindFragments(
+                scrText.ScrStylesheet(vref.BookNum),
+                doc.CreateNavigator(),
+                XPathExpression.Compile("*[false()]"),
+                out string usfm
+            );
+
+            usfm = UsfmToken.NormalizeUsfm(scrText, vref.BookNum, usfm);
+            scrText.PutText(vref.BookNum, vref.ChapterNum, true, usfm, writeLock);
+        }
+        catch (Exception e)
+        {
+            return ResponseToRequest.Failed(e.ToString());
+        }
+
+        return ResponseToRequest.Succeeded(ChapterUSX);
+    }
+
+    /// <summary>
+    /// Converts usfm to usx, but does not annotate
+    /// </summary>
+    private XmlDocument ConvertUsfmToUsx(ScrText scrText, string usfm, int bookNum)
+    {
+        ScrStylesheet scrStylesheet = scrText.ScrStylesheet(bookNum);
+        // Tokenize usfm
+        List<UsfmToken> tokens = UsfmToken.Tokenize(scrStylesheet, usfm ?? string.Empty, true);
+
+        XmlDocument doc = new XmlDocument();
+        using (XmlWriter xmlw = doc.CreateNavigator()!.AppendChild())
+        {
+            // Convert to XML
+            UsfmToUsx.ConvertToXmlWriter(scrStylesheet, tokens, xmlw, false);
+            xmlw.Flush();
+        }
+        return doc;
+    }
+
     private static void RunWithinLock(WriteScope writeScope, Action<WriteLock> action)
     {
         var myLock =
diff --git a/c-sharp/Projects/ProjectStorageInterpreter.cs b/c-sharp/Projects/ProjectStorageInterpreter.cs
index 8c7d109e43..f488053dc9 100644
--- a/c-sharp/Projects/ProjectStorageInterpreter.cs
+++ b/c-sharp/Projects/ProjectStorageInterpreter.cs
@@ -55,13 +55,13 @@ out string errorMessage
             case "getProjectData":
                 return GetProjectData(dataScope);
             case "setProjectData":
-                var setProjectReturn = SetProjectData(dataScope, args[1]!.ToJsonString());
+                var setProjectReturn = SetProjectData(dataScope, args[1]!);
                 SendDataUpdateEvent(setProjectReturn.Contents);
                 return setProjectReturn;
             case "getExtensionData":
                 return GetExtensionData(dataScope);
             case "setExtensionData":
-                var setExtensionReturn = SetExtensionData(dataScope, args[1]!.ToJsonString());
+                var setExtensionReturn = SetExtensionData(dataScope, args[1]!);
                 SendDataUpdateEvent(setExtensionReturn.Contents);
                 return setExtensionReturn;
             default:
@@ -106,7 +106,7 @@ private ResponseToRequest GetSupportedTypes()
     /// <summary>
     /// Set data in a project identified by <param name="scope"></param>.
     /// </summary>
-    public abstract ResponseToRequest SetProjectData(ProjectDataScope scope, string jsonData);
+    public abstract ResponseToRequest SetProjectData(ProjectDataScope scope, JsonNode data);
 
     /// <summary>
     /// Get an extension's data in a project identified by <param name="scope"></param>.
@@ -116,5 +116,5 @@ private ResponseToRequest GetSupportedTypes()
     /// <summary>
     /// Set an extension's data in a project identified by <param name="scope"></param>.
     /// </summary>
-    public abstract ResponseToRequest SetExtensionData(ProjectDataScope scope, string jsonData);
+    public abstract ResponseToRequest SetExtensionData(ProjectDataScope scope, JsonNode data);
 }
diff --git a/extensions/src/usfm-data-provider/index.d.ts b/extensions/src/usfm-data-provider/index.d.ts
index 6c8f0a85b0..d4b24ec5bb 100644
--- a/extensions/src/usfm-data-provider/index.d.ts
+++ b/extensions/src/usfm-data-provider/index.d.ts
@@ -29,12 +29,14 @@ declare module 'papi-shared-types' {
    * This is not yet a complete list of the data types available from Paratext projects.
    */
   export type ParatextStandardProjectDataTypes = MandatoryProjectDataType & {
-    /** Gets the "raw" USFM data for the specified book */
+    /** Gets/sets the "raw" USFM data for the specified book */
     BookUSFM: DataProviderDataType<VerseRef, string | undefined, string>;
-    /** Gets the "raw" USFM data for the specified chapter */
+    /** Gets/sets the "raw" USFM data for the specified chapter */
     ChapterUSFM: DataProviderDataType<VerseRef, string | undefined, string>;
-    /** Gets the "raw" USFM data for the specified verse */
+    /** Gets/sets the "raw" USFM data for the specified verse */
     VerseUSFM: DataProviderDataType<VerseRef, string | undefined, string>;
+    /** Gets/sets the data in USX form for the specified chapter */
+    ChapterUSX: DataProviderDataType<VerseRef, string | undefined, string>;
     /**
      * Gets the tokenized USJ data for the specified book
      *
@@ -188,6 +190,28 @@ declare module 'papi-shared-types' {
       options?: DataProviderSubscriberOptions,
     ): Unsubscriber;
 
+    /** Gets the Scripture text in USX format for the specified chapter */
+    getChapterUSX(verseRef: VerseRef): Promise<string | undefined>;
+    /** Sets the Scripture text in USX format for the specified chapter */
+    setChapterUSX(
+      verseRef: VerseRef,
+      usx: string,
+    ): Promise<DataProviderUpdateInstructions<ParatextStandardProjectDataTypes>>;
+    /**
+     * Subscribe to run a callback function when the USX data is changed
+     *
+     * @param verseRef tells the provider what changes to listen for
+     * @param callback function to run with the updated USX for this selector
+     * @param options various options to adjust how the subscriber emits updates
+     *
+     * @returns unsubscriber function (run to unsubscribe from listening for updates)
+     */
+    subscribeVerseUSX(
+      verseRef: VerseRef,
+      callback: (usx: string | undefined) => void,
+      options?: DataProviderSubscriberOptions,
+    ): Unsubscriber;
+
     /**
      * Gets the tokenized USJ data for the specified book
      *
diff --git a/src/main/main.ts b/src/main/main.ts
index 41bf013df1..09eb33c3d0 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -23,6 +23,9 @@ import extensionAssetProtocolService from '@main/services/extension-asset-protoc
 import { wait } from '@shared/utils/util';
 import { CommandNames } from 'papi-shared-types';
 import { SerializedRequestType } from '@shared/utils/papi-util';
+// Used with the commented out code at the bottom of this file to test the ParatextProjectDataProvider
+// import { getProjectDataProvider } from '@shared/services/project-data-provider.service';
+// import { VerseRef } from '@sillsdev/scripture';
 
 const PROCESS_CLOSE_TIME_OUT = 2000;
 
@@ -324,8 +327,11 @@ async function main() {
     const paratextPdp = await getProjectDataProvider<'ParatextStandard'>(
       '32664dc3288a28df2e2bb75ded887fc8f17a15fb',
     );
-    const verse = await paratextPdp.getVerseUSFM(new VerseRef('JHN', '1', '1'));
+    const verse = await paratextPdp.getChapterUSX(new VerseRef('JHN', '1', '1'));
     logger.info(`Got PDP data: ${verse}`);
+
+    if (verse !== undefined) await paratextPdp.setChapterUSX(new VerseRef('JHN', '1', '1'), verse);
+
     paratextPdp.setExtensionData(
       { extensionName: 'foo', dataQualifier: 'fooData' },
       'This is the data from extension foo',