Why use OpenRouter instead of a direct provider?

Convenience: one bill and one key across vendors, and easy A/B testing. Direct providers like Anthropic give you native features such as Anthropic's own Messages API.

Do tool calls work through OpenRouter?

Yes, as long as the model you choose supports tool calling on OpenRouter.

Integration · Models

Use hundreds of models via OpenRouter with FastClaw

Connect FastClaw to OpenRouter and give every agent access to models from many vendors with a single API key.

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One key, many vendors

The openrouter preset targets https://openrouter.ai/api/v1 with OPENROUTER_API_KEY — then choose any model OpenRouter lists.

Model per agent

Try a new model on one agent without touching the rest of your deployment.

Switch on the fly

Change the model from the console or with /model in fastclaw chat — sessions and memory carry over.

What you can do

Let agency clients pick their model without you managing a dozen vendor keys — see FastClaw for agencies.
Benchmark agents across vendors by giving each one a different model.
Fall back to a direct Anthropic or OpenAI provider whenever you need vendor-specific features.

Set it up

In Console → Models, click Add provider, choose OpenRouter and paste your key.
Add the model IDs you want to use and pick a default, or set one on an agent's Models tab.
From the CLI, the preset fills in the API base:

fastclaw agents config alpha set provider.openrouter.apiKeyEnv OPENROUTER_API_KEY
fastclaw agents config alpha set provider.openrouter.apiBase https://openrouter.ai/api/v1

Notes

Learn how providers, defaults and per-agent overrides fit together on the models feature page.

Frequently asked questions

More Integrations

All Integrations

OpenAI

Run FastClaw agents on OpenAI models — set a deployment-wide default, override per agent, and expose your agents through an OpenAI-compatible API.

Anthropic

Run FastClaw agents on Claude through Anthropic's native Messages API — with prompt caching, extended thinking and image input preserved.

DeepSeek

Run FastClaw agents on DeepSeek — a built-in preset, thinking-mode support and per-agent model overrides for low-cost, capable agents.

Ollama

Point FastClaw at Ollama to run AI agents on local, open-weight models — no API key, no data leaving your machine.

Try it on your own agents

Start free in FastClaw Cloud, or self-host the single binary in a minute.

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