AI Coding API Relay Guide: How to Use Claude Code from China at Lower Cost

Claude Code, Codex, and Gemini CLI have become the most powerful terminal AI coding tools. However, developers in China face two major barriers: network access restrictions and international payment difficulties. API relay services have emerged as the bridge connecting developers to overseas AI models. This article provides a practical comparison of major relay services to help you choose.

One-Line Summary

• Official direct access: Best experience, but requires a VPN + international credit card, highest cost
• Coding-specific relays: Designed for Claude Code / Codex, zero-config setup, pay-as-you-go or monthly
• General API aggregators: More models (600+), but less optimized for coding tools
• Self-hosted open source: Most secure data handling, but requires technical skills and servers

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Official vs Relay: Which Should I Choose?

Dimension	Official Direct	Coding-Specific Relay	General API Aggregator	Self-Hosted
Examples	Anthropic API	AICodeMirror, GAC Code	OpenRouter, Lingya	OneAPI / New API
Direct access from China	No (requires VPN)	Yes	Partial	Yes (your server)
Payment	International credit card	Alipay/WeChat	Alipay/WeChat	Server costs only
Price	Base price	1.0x–1.5x multiplier	1.0x–1.5x multiplier	API base price + server
Tool integration	Native	One-click setup scripts	Manual configuration	Manual configuration
Data security	Highest	Medium (trust the platform)	Medium	Highest (self-controlled)
Best for	Users with VPN + credit card	Most developers in China	Multi-model app developers	Enterprise / privacy-sensitive

What is a “multiplier”? The markup ratio compared to official API pricing. 1.0x = forwarding at original price, 1.5x = 1.5 times the official price.

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Coding-Specific Relay Services Comparison

These relay services are specifically designed for terminal coding tools like Claude Code / Codex / Gemini CLI. Unlike general API aggregators, they typically provide one-click configuration scripts and optimized experiences for coding scenarios.

Overview

Relay Service	Supported Tools	Billing Model	Direct China Access	Payment	Highlights
AICodeMirror	Claude Code, Codex, VS Code, JetBrains	Credits (top-up)	Yes	Alipay/WeChat	Free credits on signup, one-click scripts
SSSAiCode	Claude Code, Codex, Gemini CLI	Monthly + Pay-as-you-go	Yes	Alipay/WeChat	Lowest price positioning, same-day invoicing
GAC Code	Claude Code	Tiered monthly plans	Yes	Alipay/WeChat	Near-Max features, tiered pricing
UniVibe	Claude Code, Codex, Cursor	Subscription	Yes	Alipay/WeChat	One subscription, multi-platform access
AiCodeWith	Claude Code, Codex	Pay-as-you-go	Yes	Alipay/WeChat	Good community reputation
88Code	Claude Code, Codex	Monthly	Yes	Alipay/WeChat	Budget positioning, from $9.99/mo
AIGoCode	TBD	TBD	TBD	TBD	Limited public information

Pricing Reference

Relay Service	Entry Price	Heavy Usage	vs Official Max ($200/mo)
AICodeMirror	Free credits on signup	Depends on top-up amount	Significantly lower
SSSAiCode	Pay-as-you-go ~¥0.5/$	Monthly plans available	~30%-50% of official
GAC Code	¥299/mo (mid-tier)	¥599/mo (high-tier)	Mid ~20%, High ~40%
88Code	$9.99/mo (10M tokens)	Suitable for light-medium use	~5% of official
AnyRouter	Free $60-100 credits on signup	Pay-as-you-go after	Free initially

⚠ Prices change frequently. The above data is for reference only — please check each platform’s website for current pricing.

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General API Aggregation Platforms

If you need more than just Claude Code — say, access to GPT, DeepSeek, Gemini, and other models for application development — general aggregation platforms are more suitable.

Platform	Model Count	Direct China Access	Highlights
OpenRouter	300+	No (requires VPN)	Widest global model library, OpenAI-compatible API
Lingya API	600+	Yes	Domestic + overseas models, Alipay/WeChat, invoicing
SiliconFlow	100+	Yes	High performance, low latency, 99.95% SLA
Yunwu API	Major models	Yes	Established direct-access service

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Self-Hosted Open Source Solutions

For enterprise users or developers with strict data security requirements.

Project	Purpose	Tech Stack	Stars
OneAPI / New API	General API gateway with billing, risk control, routing	Go	20k+
CLIProxyAPI	Wraps CLI tools as API services	TypeScript	5k+
claude-relay-service (CRS)	Claude Code relay, supports sharing	TypeScript	3k+
claude-code-proxy	Claude → OpenAI format conversion proxy	Python	2k+

The key advantage of self-hosting is full control over your data flow — code never passes through any third party. The downside is maintaining servers, handling high availability, and scaling.

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8 Core Evaluation Dimensions

When choosing a relay service, evaluate across these dimensions:

1. Multiplier / Unit Price

The markup over official API pricing. Mainstream coding relays range from 1.0x to 1.5x, with some platforms offering effective rates below 1.0x through top-up bonuses.

2. Billing Model

• Pay-as-you-go: Best for developers with fluctuating usage
• Monthly plans: Best for heavy daily users
• Credits system: Flexible but watch for expiration dates

3. Supported Tools

Verify support for your specific tools (Claude Code / Codex / Gemini CLI / Cursor, etc.) and whether one-click configuration scripts are provided.

4. Supported Models

Check coverage of models you need (Sonnet 4.5 / Opus 4.6 / GPT / Gemini, etc.) and how quickly new models are added.

5. Stability / Latency

Is there throttling during peak hours? Is latency consistent? Always start with a small trial before committing to large top-ups.

6. Payment & Invoicing

Does it support Alipay/WeChat? Can it issue VAT invoices? (Critical for business users in China.)

7. Security & Trust

• Relay services can theoretically log all your requests (code, prompts)
• Prefer platforms with longer track records, registered business entities, and good community reputation
• For sensitive commercial code, use official direct access or self-hosted solutions

8. Onboarding Barrier

Does registration require a VPN? Are there free trial credits? How complex is the configuration?

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Using with CodePick-Listed Tools

Claude Code + Relay Service

# Set relay URL and API Key (using AICodeMirror as example)
export ANTHROPIC_BASE_URL=https://api.aicodemirror.com
export ANTHROPIC_API_KEY=sk-xxxxx

# Launch Claude Code
claude

Cline / Roo Code + Relay Service

In the VS Code extension settings, change the API Base URL to the relay service address and enter the API Key provided by the relay service.

Aider / OpenCode + Relay Service

# Aider (for relays with OpenAI-compatible format)
export OPENAI_API_BASE=https://api.example.com/v1
export OPENAI_API_KEY=sk-xxxxx
aider --model claude-sonnet-4-5

# OpenCode (same approach)
export OPENAI_API_BASE=https://api.example.com/v1
export OPENAI_API_KEY=sk-xxxxx
opencode

Different relay services may use different Base URL formats (some use Anthropic’s native format, others use OpenAI-compatible format). Always refer to each platform’s documentation.

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Use Case Recommendations

Individual developer, light usage (occasional coding)

→ Start with AnyRouter’s free credits, or choose 88Code’s $9.99/month starter plan

Individual developer, heavy usage (daily coding)

→ GAC Code ¥299 tier or SSSAiCode monthly plan for the best value

Team / Enterprise users

→ Prioritize platforms that can issue invoices (Lingya API, SSSAiCode), or self-host OneAPI/New API

Sensitive code / High privacy requirements

→ Self-host CRS / OneAPI or use the official API + VPN

Need multi-model switching (not just Claude)

→ Lingya API (600+ models) or OpenRouter (300+ models)

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Risk Warnings

1. Data security: Relay services can see all your request content (code, prompts). Use official direct access or self-hosted solutions for proprietary code
2. Service stability: Small platforms may shut down at any time — avoid large one-time top-ups; top up in small amounts
3. Account risk: Some relays use shared account pools, which may be subject to upstream bans
4. Price volatility: Relay prices fluctuate frequently with upstream API price changes; prices listed here are for reference only
5. Compliance: Enterprise users should choose platforms with registered business entities that can issue invoices

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Price Comparison Tools

• HelpAIO Relay Rankings — Comprehensive rankings (subjective reviews + stability + pricing)
• AI API PK — Real-time model price comparison

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Summary

Your Situation	Recommended Approach
Have VPN + credit card, want best experience	Official Anthropic API direct access
China network, limited budget	Coding-specific relay (GAC Code / SSSAiCode)
Need multiple models for app development	General aggregator (Lingya API / OpenRouter)
Enterprise, data security priority	Self-host OneAPI / New API
Want to try for free first	AnyRouter free signup credits

Data based on March 2026 research. The relay service market changes rapidly — please check each platform’s website for the latest information. We recommend starting with a small trial to verify stability before committing long-term.