diff --git a/internal/channel/anthropic_channel.go b/internal/channel/anthropic_channel.go
index 6e481c7..52f9482 100644
--- a/internal/channel/anthropic_channel.go
+++ b/internal/channel/anthropic_channel.go
@@ -115,8 +115,8 @@ func (ch *AnthropicChannel) ValidateKey(ctx context.Context, key string) (bool,
 	}
 	defer resp.Body.Close()
 
-	// A 200 OK status code indicates the key is valid and can make requests.
-	if resp.StatusCode == http.StatusOK {
+	// Any 2xx status code indicates the key is valid.
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
 		return true, nil
 	}
 
diff --git a/internal/channel/gemini_channel.go b/internal/channel/gemini_channel.go
index 9b4103e..0d327af 100644
--- a/internal/channel/gemini_channel.go
+++ b/internal/channel/gemini_channel.go
@@ -132,8 +132,8 @@ func (ch *GeminiChannel) ValidateKey(ctx context.Context, key string) (bool, err
 	}
 	defer resp.Body.Close()
 
-	// A 200 OK status code indicates the key is valid.
-	if resp.StatusCode == http.StatusOK {
+	// Any 2xx status code indicates the key is valid.
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
 		return true, nil
 	}
 
diff --git a/internal/channel/openai_channel.go b/internal/channel/openai_channel.go
index 650912d..39083c6 100644
--- a/internal/channel/openai_channel.go
+++ b/internal/channel/openai_channel.go
@@ -113,8 +113,8 @@ func (ch *OpenAIChannel) ValidateKey(ctx context.Context, key string) (bool, err
 	}
 	defer resp.Body.Close()
 
-	// A 200 OK status code indicates the key is valid and can make requests.
-	if resp.StatusCode == http.StatusOK {
+	// Any 2xx status code indicates the key is valid.
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
 		return true, nil
 	}