Zerouter is an AI API gateway and OpenRouter alternative. One API key calls Claude, GPT, Gemini, Grok and Kimi through OpenAI-compatible and Anthropic-compatible endpoints.

How does Zerouter charge?

There is no monthly fee or seat fee. Input, output and cache tokens are billed at the published USD per 1M rate for the selected model.

Which clients work with Zerouter?

The site lists Claude Code, Codex CLI, OpenCode, Cursor, Aider, Cline, Roo Code, Kilo Code, Continue, Gemini CLI, Windsurf and other clients that allow a custom base URL.

Does Zerouter substitute or downgrade models?

No. Zerouter says the model ID sent is the model that runs and is billed, and that the usage ledger records the model on every call.

Does Zerouter rewrite prompts?

No. The site says requests go straight to the official model API and nothing in between rewrites prompts.

What is the Claude Code base URL?

Set ANTHROPIC_BASE_URL to https://api.zerouter.ai and put the Zerouter key in ANTHROPIC_AUTH_TOKEN. OpenAI-compatible clients use https://api.zerouter.ai/v1.

What models does Zerouter support?

The public catalog lists current models from Claude, GPT, Gemini, Grok and Kimi. The catalog updates as new models launch.

Does Zerouter store prompts or credentials?

The site says providers complete OAuth or device authentication on their official domains and Zerouter stores an encrypted credential for routing only.

Zerouter

One API gateway for Claude, GPT, Gemini, Grok and Kimi

AI Tools Developer Tools SaaS

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Launched: Nov 8, 2026
Website: zerouter.ai
Pricing: Paid
Platforms: Web, API, CLI
Based in: Singapore

Zerouter is an AI API gateway and OpenRouter alternative for developers and teams using coding agents, SDKs or other clients that support a custom base URL. One API key provides access to Claude, GPT, Gemini, Grok and Kimi models through compatible endpoints.

Set the gateway URL in Claude Code, Codex CLI, Cursor or another supported client, then choose a model. Zerouter routes requests to the official model API, keeps the requested model ID, and records the model, token usage and cost. Billing is pay as you go by input, output and cache tokens, with no subscription or monthly seat fee.

What Zerouter does

One API key for multiple models: Call Claude, GPT, Gemini, Grok and Kimi through one Zerouter API key and base URL.
Compatible client setup: Connect Claude Code, Codex CLI, Cursor, Cline, SDKs and other clients that support custom endpoints.
Three API protocols: Use Messages, Responses or Chat Completions paths depending on the model and client.
Model identity retained: The model ID sent is the model that runs and is billed; Zerouter says it does not substitute or downgrade models.
Usage ledger: Each call is logged with its model, token usage and cost.
Pay-as-you-go billing: Input, output and cache tokens are billed at the published per-million-token rate, without a subscription.

Who it's for

Developers and teams using Claude Code, Codex CLI, Cursor, SDKs or other clients that accept a custom API base URL.

Why people use Zerouter

Using multiple model providers can require separate accounts, endpoints and billing arrangements, while coding clients may need compatible gateway settings.

Zerouter provides one API key and base URL for Claude, GPT, Gemini, Grok and Kimi, with compatible endpoints and usage-based billing.

The site says Zerouter sends requests to official model APIs without model substitution or prompt rewriting, while spreading capacity across many independent providers.

Pricing

Zerouter is a paid product. Its website has the current prices.

Platforms

Zerouter runs on Web, API, CLI.

Zerouter FAQ

What is Zerouter?: Zerouter is an AI API gateway and OpenRouter alternative. One API key calls Claude, GPT, Gemini, Grok and Kimi through OpenAI-compatible and Anthropic-compatible endpoints.
How does Zerouter charge?: There is no monthly fee or seat fee. Input, output and cache tokens are billed at the published USD per 1M rate for the selected model.
Which clients work with Zerouter?: The site lists Claude Code, Codex CLI, OpenCode, Cursor, Aider, Cline, Roo Code, Kilo Code, Continue, Gemini CLI, Windsurf and other clients that allow a custom base URL.
Does Zerouter substitute or downgrade models?: No. Zerouter says the model ID sent is the model that runs and is billed, and that the usage ledger records the model on every call.
Does Zerouter rewrite prompts?: No. The site says requests go straight to the official model API and nothing in between rewrites prompts.
What is the Claude Code base URL?: Set ANTHROPIC_BASE_URL to https://api.zerouter.ai and put the Zerouter key in ANTHROPIC_AUTH_TOKEN. OpenAI-compatible clients use https://api.zerouter.ai/v1.
What models does Zerouter support?: The public catalog lists current models from Claude, GPT, Gemini, Grok and Kimi. The catalog updates as new models launch.
Does Zerouter store prompts or credentials?: The site says providers complete OAuth or device authentication on their official domains and Zerouter stores an encrypted credential for routing only.