diff --git a/skills/openai-whisper-api/SKILL.md b/skills/openai-whisper-api/SKILL.md
index 99e54340ded1..2b18c6ec6dca 100644
--- a/skills/openai-whisper-api/SKILL.md
+++ b/skills/openai-whisper-api/SKILL.md
@@ -25,7 +25,7 @@ metadata:
 
 # OpenAI Whisper API (curl)
 
-Transcribe an audio file via OpenAI’s `/v1/audio/transcriptions` endpoint.
+Transcribe an audio file via OpenAI’s `/v1/audio/transcriptions` endpoint. Set `OPENAI_BASE_URL` to use an OpenAI-compatible proxy or local gateway.
 
 ## Quick start
 
@@ -49,7 +49,7 @@ Defaults:
 
 ## API key
 
-Set `OPENAI_API_KEY`, or configure it in `~/.openclaw/openclaw.json`:
+Set `OPENAI_API_KEY`, or configure it in `~/.openclaw/openclaw.json`. Optionally set `OPENAI_BASE_URL` (for example `http://127.0.0.1:51805/v1`) to use an OpenAI-compatible proxy or local gateway:
 
 ```json5
 {
diff --git a/skills/openai-whisper-api/scripts/transcribe.sh b/skills/openai-whisper-api/scripts/transcribe.sh
index 551c7b473e27..2a4fd20afa61 100644
--- a/skills/openai-whisper-api/scripts/transcribe.sh
+++ b/skills/openai-whisper-api/scripts/transcribe.sh
@@ -72,7 +72,10 @@ fi
 
 mkdir -p "$(dirname "$out")"
 
-curl -sS https://api.openai.com/v1/audio/transcriptions \
+api_base="${OPENAI_BASE_URL:-https://api.openai.com/v1}"
+api_base="${api_base%/}"
+
+curl -sS "${api_base}/audio/transcriptions" \
   -H "Authorization: Bearer $OPENAI_API_KEY" \
   -H "Accept: application/json" \
   -F "file=@${in}" \