diff --git a/backend/CrdtMerge/CrdtMerge.csproj b/backend/CrdtMerge/CrdtMerge.csproj
index e6dc205b6..d828a99e4 100644
--- a/backend/CrdtMerge/CrdtMerge.csproj
+++ b/backend/CrdtMerge/CrdtMerge.csproj
@@ -9,6 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.0-rc.1.24452.1" />
+    <PackageReference Include="Scalar.AspNetCore" Version="1.2.22" />
     <PackageReference Include="SIL.ChorusPlugin.LfMergeBridge" Version="4.2.0-beta0027" />
     <PackageReference Include="SIL.Chorus.Mercurial" Version="6.5.1.*" />
   </ItemGroup>
diff --git a/backend/CrdtMerge/Program.cs b/backend/CrdtMerge/Program.cs
index 8774acf85..674aa6dfd 100644
--- a/backend/CrdtMerge/Program.cs
+++ b/backend/CrdtMerge/Program.cs
@@ -4,6 +4,7 @@
 using LcmCrdt;
 using Microsoft.Extensions.Options;
 using MiniLcm;
+using Scalar.AspNetCore;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -19,6 +20,8 @@
 if (app.Environment.IsDevelopment())
 {
     app.MapOpenApi();
+    //access at /scalar/v1
+    app.MapScalarApiReference();
 }
 
 app.UseHttpsRedirection();