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This page covers the most common questions about using Flatkey. If you have a question not answered here, contact support@flatkey.ai or use the live chat in the console.

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Getting started

Flatkey is an AI API gateway that provides access to 160+ official AI models from OpenAI, Anthropic, Google, DeepSeek, Qwen, GLM, and more — all through a single OpenAI-compatible API key. It is a drop-in replacement for any OpenAI-compatible client: change base_url to https://router.flatkey.ai/v1, use your Flatkey key, and route to any model at discounted rates.
No. One Flatkey API key routes to all 160+ models across all providers. You do not need separate OpenAI, Anthropic, or Google API keys.
Yes. Flatkey routes your requests to the official vendor APIs — OpenAI, Anthropic, Google, DeepSeek, etc. The model outputs come directly from the original provider infrastructure. Flatkey does not host, fine-tune, or modify any models.

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Billing and pricing

Flatkey is prepaid. You top up your balance (10,10, 20, $200, or custom enterprise) and the cost of each API request is deducted from your balance in real time. There are no subscriptions or recurring charges.
Every top-up earns bonus credit: +3on3 on 10, +8on8 on 20, +100on100 on 200. Bonus credit is added to your balance instantly, never expires, and spends just like paid credit. It is not a discount code — it is real credit that appears in your balance.
Yes. You can top up as many times as you like, and you earn bonus credit on each top-up. Three 200top−upsearn200 top-ups earn 300 in bonus credit total.
API requests return a 401 Insufficient Balance error. There are no automatic charges. Top up your balance to resume. Enable low-balance alerts in Settings → Notifications to avoid interruptions.

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Compatibility and models

Yes. The OpenAI Python and Node.js SDKs support a base_url parameter. Set it to https://router.flatkey.ai/v1 and use your Flatkey API key. No other changes are needed.
Yes. Set base_url to https://router.flatkey.ai (no /v1) in the Anthropic SDK constructor and use your Flatkey API key. See the Anthropic SDK guide for details.
Use the same canonical model IDs you would use with the original provider — for example gpt-4o, claude-sonnet-4-5, gemini-2.5-flash. The full list is in the Model Directory.
Yes. Set stream: true in your request. Flatkey returns server-sent events (SSE) in the same format as the OpenAI API. Streaming works for all chat and text generation models.

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Privacy and security

No. Flatkey has zero retention of request content — prompts and completions are never written to disk or stored. Only metadata (model, token counts, timestamps, cost) is recorded for billing and analytics.
Flatkey operates under GDPR-compliant infrastructure and maintains controls aligned with SOC 2 and ISO 27001 standards.
Revoke the key immediately from the Keys page in the console. Revocation is instant. Then create a new key and update your application. See API Key Management for details.

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Enterprise

Yes. Enterprise accounts support invoice billing, custom monthly usage, team procurement, and dedicated routing discounts. Contact support@flatkey.ai to discuss terms.
Yes. Use Groups in the console to set model access policies and spend quotas on individual keys or groups of keys.

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Support