3 files changed, 13 insertions, 0 deletions
diff --git a/internal/api/model/instancev1.go b/internal/api/model/instancev1.go
index 03e27619c..217edc08c 100644
--- a/internal/api/model/instancev1.go
+++ b/internal/api/model/instancev1.go
@@ -59,6 +59,8 @@ type InstanceV1 struct {
 	//
 	// example: 0.1.1 cb85f65
 	Version string `json:"version"`
+	// Whether or not instance is running in DEBUG mode. Omitted if false.
+	Debug *bool `json:"debug,omitempty"`
 	// Primary language of the instance.
 	// example: ["en"]
 	Languages []string `json:"languages"`
diff --git a/internal/api/model/instancev2.go b/internal/api/model/instancev2.go
index dda9033b4..a1b98ea65 100644
--- a/internal/api/model/instancev2.go
+++ b/internal/api/model/instancev2.go
@@ -40,6 +40,8 @@ type InstanceV2 struct {
 	//
 	// example: 0.1.1 cb85f65
 	Version string `json:"version"`
+	// Whether or not instance is running in DEBUG mode. Omitted if false.
+	Debug *bool `json:"debug,omitempty"`
 	// The URL for the source code of the software running on this instance, in keeping with AGPL license requirements.
 	// example: https://github.com/superseriousbusiness/gotosocial
 	SourceURL string `json:"source_url"`
diff --git a/internal/typeutils/internaltofrontend.go b/internal/typeutils/internaltofrontend.go
index 2b340a191..abe2cfaee 100644
--- a/internal/typeutils/internaltofrontend.go
+++ b/internal/typeutils/internaltofrontend.go
@@ -26,6 +26,7 @@ import (
 	"strings"
 	"time"
 
+	"codeberg.org/gruf/go-debug"
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
@@ -1200,6 +1201,10 @@ func (c *Converter) InstanceToAPIV1Instance(ctx context.Context, i *gtsmodel.Ins
 		instance.Version = toMastodonVersion(instance.Version)
 	}
 
+	if debug.DEBUG {
+		instance.Debug = util.Ptr(true)
+	}
+
 	// configuration
 	instance.Configuration.Statuses.MaxCharacters = config.GetStatusesMaxChars()
 	instance.Configuration.Statuses.MaxMediaAttachments = config.GetStatusesMediaMaxFiles()
@@ -1307,6 +1312,10 @@ func (c *Converter) InstanceToAPIV2Instance(ctx context.Context, i *gtsmodel.Ins
 		instance.Version = toMastodonVersion(instance.Version)
 	}
 
+	if debug.DEBUG {
+		instance.Debug = util.Ptr(true)
+	}
+
 	// thumbnail
 	thumbnail := apimodel.InstanceV2Thumbnail{}