AgentRouter is a proxied LLM Key provider for premium models from Anthropic, OpenAI etc. They sit between the official provider and end users (you) and provide API keys.
Current they are giving a $50 API credit when you sign up through an invitation link, letting you test top-tier models like Claude Opus 4.8 and GPT 5.5. There is no student ID, no credit card needed.
Here are the current available LLM models.
Note on the credits:
The $50 balance uses a custom conversion rate where consumption is ~4x higher than standard API pricing (e.g., $1 of actual usage consumes ~$4 of these credits). However, you can easily stack more balance by sharing your own link each referral earns you $100 and your friend $50.
How to claim the deal?
- Go to the AgentRouter registration page via the invite link.
- Sign up using your GitHub or LinuxDO account (recommended), or create a standard username and password (appears sometime).
- Your $50 introductory credit will be credited to your wallet balance.
How to use AgentRouter API with Antigravity IDE (via Cline Extension):
- Login to your AgentRouter account.
- Get your API key from the AgentRouter API Token page.
- Use these settings in as shown in image while creating API for unrestricted use.
- Download and set up the Antigravity IDE on your system.
- Go to Extensions and install the Cline extension (the popular one with 4.6M+ installs).
- Open Cline from the left sidebar and apply these settings as shown below:
- API Provider:
Anthropic - Anthropic API Key: Paste your AgentRouter API key.
- Custom base URL:
https://agentrouter.org - Model: Choose your preferred models; select
claude-opus-4-8:1mas your top-tier option.
- API Provider:
- Save settings and start coding with Cline just like the built-in Antigravity chat.
- If your setup works, you shall see credit usage in your Agentrouter account.
More AgentRouter Integration:
If you want to integrate Agentrouter API with other providers, read this official doc (translate language to english).
See Claude Opus 4.8 in action on Antigravity. Check proof section for more proofs.
Keep inviting your friends via your invite link and add more credits to your AgentRouter account.
Key Benefits
- Access elite models including Claude Opus 4.8, GPT 5.5, and GLM 5.2 through one key.
- Highly compatible with advanced AI coding tools like Claude Code, Cursor, Trae, and Cline.
- Unlimited referral system allows you to scale up your API balance easily.
- Fast authentication via GitHub and LinuxDO social logins.
Eligibility
| Requirements | • No Credit Card Required
|
|---|---|
| Criteria |
|
About AgentRouter
AgentRouter acts as an alternative API proxy layer that aggregates cutting-edge LLMs from Anthropic, OpenAI, and Zhipu AI into a single endpoint. It gives developers frictionless, low-latency access to premium models like Claude Opus (4.6/4.7/4.8), GPT 5.5, and GLM 5.2 without needing separate standalone accounts for each provider. It integrates natively into dev workflows and popular AI coding tools.
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