diff --git a/.env.example b/.env.example
index 35e22d4..f560588 100644
--- a/.env.example
+++ b/.env.example
@@ -1,11 +1,18 @@
 # LLM Provider Configuration
-# Support Anthropic API or compatible providers (e.g. OpenRouter)
+# Support Anthropic API or compatible providers (e.g. OpenRouter, OrcaRouter)
 ANTHROPIC_API_KEY=sk-ant-xxxxx
 MODEL_ID=claude-sonnet-4-20250514
 
 # Optional: custom base URL for API-compatible providers
 # ANTHROPIC_BASE_URL=https://openrouter.ai/api/v1
 
+# OrcaRouter: OpenAI-compatible AI gateway (models + agents), with adaptive
+# routing, failover, observability, guardrails and agent-tool governance.
+# Works with the Anthropic SDK via base_url; use a namespaced model id:
+# ANTHROPIC_API_KEY=<your OrcaRouter key>
+# ANTHROPIC_BASE_URL=https://api.orcarouter.ai
+# MODEL_ID=orcarouter/auto
+
 # Telegram (optional, for s04_channels.py)
 # TELEGRAM_BOT_TOKEN=123456:ABC-DEF
 
diff --git a/README.ja.md b/README.ja.md
index 457aef3..aee80e1 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -81,6 +81,10 @@ pip install -r requirements.txt
 # 3. 設定
 cp .env.example .env
 # .env を編集: ANTHROPIC_API_KEY と MODEL_ID を設定
+# 互換性のある API ゲートウェイを名前付きプロバイダーとして使うこともできます (例: OrcaRouter):
+#   ANTHROPIC_API_KEY=<あなたの OrcaRouter キー>
+#   ANTHROPIC_BASE_URL=https://api.orcarouter.ai
+#   MODEL_ID=orcarouter/auto
 
 # 4. 任意のセクションを実行 (言語を選択)
 python sessions/ja/s01_agent_loop.py    # 日本語
diff --git a/README.md b/README.md
index 29adea6..8318fff 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,10 @@ pip install -r requirements.txt
 # 3. Configure
 cp .env.example .env
 # Edit .env: set ANTHROPIC_API_KEY and MODEL_ID
+# Or use any API-compatible gateway as a named provider, e.g. OrcaRouter:
+#   ANTHROPIC_API_KEY=<your OrcaRouter key>
+#   ANTHROPIC_BASE_URL=https://api.orcarouter.ai
+#   MODEL_ID=orcarouter/auto
 
 # 4. Run any section (pick your language)
 python sessions/en/s01_agent_loop.py    # English
diff --git a/README.zh.md b/README.zh.md
index 3db3a5c..632a6a0 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -81,6 +81,10 @@ pip install -r requirements.txt
 # 3. 配置
 cp .env.example .env
 # 编辑 .env: 填入 ANTHROPIC_API_KEY 和 MODEL_ID
+# 也可使用任意 API 兼容网关作为命名服务商, 例如 OrcaRouter:
+#   ANTHROPIC_API_KEY=<你的 OrcaRouter key>
+#   ANTHROPIC_BASE_URL=https://api.orcarouter.ai
+#   MODEL_ID=orcarouter/auto
 
 # 4. 运行任意章节 (选择你的语言)
 python sessions/zh/s01_agent_loop.py    # 中文