# Anthropic-Compatible Endpoints for Chinese AI Providers

Discovered from tommo/sublime-claude config and iFlytek docs.
All use x-api-key header + anthropic-version: 2023-06-01.

| Provider | Base URL | Env Var | Models | Status |
|---|---|---|---|---|
| 火山引擎 (Volcano) | https://ark.cn-beijing.volces.com/api/coding | ARK_API_KEY | ark-code-latest, claude-sonnet-4-6, claude-opus-4-6 | ✅ CONFIRMED |
| 智谱 (ZhipuAI) | https://open.bigmodel.cn/api/anthropic | GLM_API_KEY | glm-4.7, glm-4.6, glm-4.5 | ✅ CONFIRMED |
| 百度千帆 (Qianfan) | https://qianfan.baidubce.com/anthropic/coding | bce-v3/ALTAKSP- | qianfan-code-latest, deepseek-v4-flash, glm-5 | ✅ CONFIRMED |
| 美团龙猫 (LongCat) | https://api.longcat.chat/anthropic | ak_ | LongCat-2.0 | ✅ CONFIRMED |
| MiniMax | https://api.minimaxi.com/anthropic | sk-cp- | MiniMax-M2.5 | ✅ CONFIRMED |
| 讯飞 (iFlytek) | https://maas-coding-api.cn-huabei-1.xf-yun.com/anthropic | ASTRON_API_KEY | astron-code-latest, xsparkx2, xsparkx2flash | ❌ No leaked keys found |
| StepFun | https://api.stepfun.ai/v1/anthropic | STEPFUN_API_KEY | step-3.5-flash | Untested |
| 百炼 (Bailian) | https://token-plan.cn-beijing.maas.aliyuncs.com/apps/anthropic | BAILIAN_API_KEY | qwen3.7-plus | Untested |

## iFlytek Coding Plan Details

### OpenAI-compatible endpoint
POST https://maas-coding-api.cn-huabei-1.xf-yun.com/v2/chat/completions
Auth: Authorization: Bearer <ASTRON_API_KEY>

### Anthropic-compatible endpoint
POST https://maas-coding-api.cn-huabei-1.xf-yun.com/anthropic/v1/messages
Auth: x-api-key: <ASTRON_API_KEY>

### Token Plan (separate)
POST https://maas-token-api.cn-huabei-1.xf-yun.com/v2/chat/completions
Auth: Authorization: Bearer <ASTRON_API_KEY>

### Available Models (Coding Plan)
- xsparkx2agent — Spark X2 Agent
- xsparkx2 — Spark X2
- xsparkx2flash — Spark-X2-Flash
- xopglm5 — GLM-5
- xopglm51 — GLM-5.1
- xopdeepseekv4pro — DeepSeek-V4-Pro
- xopdeepseekv4flash — DeepSeek-V4-Flash
- xopdeepseekv32 — DeepSeek-V3.2
- xopkimik26 — Kimi-K2.6
- xminimaxm25 — MiniMax-M2.5
- xopqwen35397b — Qwen3.5-397B
- astron-code-latest — Console-switched model

### Key Format
- Separate from regular Spark API keys (which use HMAC auth)
- Each subscription has its own dedicated API key
- Obtained from https://maas.xfyun.cn/packageSubscription
- No leaked keys found on GitHub (service too new, keys in env vars)