# What is a BYOK AI gateway?

> A BYOK AI gateway uses model-provider credentials supplied by the customer instead of, or alongside, gateway-funded access. The gateway can centralize routing, logs, limits and policy while the provider account remains yours. BYOK changes who bills inference and who owns the contract, but it does not remove gateway fees, credential risk, logging decisions or provider-specific limits unless the product explicitly says so.

_Last reviewed 2026-08-15 · [Editorial review](https://keeprouter.com/editorial-policy#editorial-team)_

## The request has two commercial layers

| Layer | Typical owner in BYOK | Questions to verify |
|---|---|---|
| Provider account | Customer | Model access, region, quota, invoice and contract |
| Provider credential | Customer supplies it; gateway stores or injects it | Encryption, rotation, retrieval and revocation |
| Gateway control | Gateway service or self-hosted deployment | Routing, policy, logs, limits and gateway charges |
| Inference bill | Usually provider account | Whether any gateway credits or fallback routes can also be used |

The exact behavior varies. Some services can fall back from a failed customer key to gateway-funded credentials. Some charge a platform subscription, request fee or BYOK fee. Others pass provider prices through. Read current pricing and routing docs instead of treating BYOK as a synonym for free gateway usage.

## Why teams choose BYOK

Existing provider contracts may include negotiated pricing, regional terms, quotas or support. Security teams may require direct ownership of provider access. Finance may want provider invoices to stay separate from gateway operations. BYOK can preserve those relationships while avoiding separate routing and observability code in every application.

It also increases setup work. Every provider key needs least privilege, rotation, environment separation and quota management. A broad gateway token plus several broad provider keys creates two layers of credentials to protect.

## Questions for a proof

1. Where is each provider credential stored and encrypted?
2. Can gateway staff or application users retrieve plaintext?
3. Which provider and account serves each request?
4. What happens when a credential expires, reaches quota or is revoked?
5. Can the gateway fall back to its own credentials, and who pays?
6. Which prompts, outputs and metadata are logged by both companies?
7. How do gateway usage records reconcile with the provider invoice?

Test those cases with a low-scope credential before production. The [security answer](/answers/is-an-ai-gateway-secure) covers the trust boundary, and the [cost-control guide](/blog/control-multi-model-api-costs) explains why the whole logical operation matters.

## BYOK compared with managed credits

Managed credits are simpler when a team wants one account, one balance and no provider onboarding. BYOK is more suitable when direct provider ownership is a requirement. A hybrid can support both, but it needs explicit routing and billing evidence so a request does not move between commercial paths unexpectedly.

KeepRouter currently presents a managed prepaid catalog rather than a public BYOK customer contract. Compare that operating model with BYOK products through the [gateway shortlist](/compare/best-ai-gateways) and current official documentation.

## Frequently asked questions

### Does BYOK mean no gateway fee?

No. The provider may bill inference directly while the gateway still charges a subscription, request, platform or BYOK fee.

### Who owns the provider account?

The customer normally owns it and supplies a credential, but the gateway's exact storage and routing model must be verified.

### Can BYOK use negotiated provider pricing?

Often the provider invoice follows the customer's contract, but gateway fees and fallback-funded traffic can follow separate terms.

### What happens when my provider key fails?

The gateway may return an error, try another customer key, or use a gateway-funded route. Configure and test the intended behavior.

### Is BYOK more private?

Not automatically. Both gateway and provider data paths, logging and retention still need review.

## Sources reviewed

1. [Vercel AI Gateway authentication and BYOK](https://vercel.com/docs/ai-gateway/authentication-and-byok)
2. [OpenRouter BYOK documentation](https://openrouter.ai/docs/guides/overview/auth/byok)
3. [Helicone AI Gateway overview](https://docs.helicone.ai/gateway/overview)

## Related guides

- [KeepRouter vs Vercel AI Gateway](https://keeprouter.com/compare/vercel-ai-gateway.md)
- [KeepRouter vs OpenRouter](https://keeprouter.com/compare/openrouter.md)
- [Is an AI gateway secure?](https://keeprouter.com/answers/is-an-ai-gateway-secure.md)
- [How to control multi-model API costs with evidence, limits, and ownership](https://keeprouter.com/blog/control-multi-model-api-costs.md)
- [Best AI gateways by use case](https://keeprouter.com/compare/best-ai-gateways.md)
- [Usage-based billing](https://keeprouter.com/features/usage-based-billing.md)

## Test the contract with a real model

Create a narrowly scoped key, select a model from the live catalog, and run the exact request shape your application depends on.

[Create a free key](https://keeprouter.com/login?returnTo=%2Fconsole%2Fkeys%3Fmodel%3Dfree) · [Live models and pricing](https://keeprouter.com/models.md)