Billing

When you build ModelRelay into a product, each model request your customers trigger can be attributed to the customer who made it. ModelRelay meters that usage per customer so you can enforce tier spend limits, understand cost, and settle charges through Stripe-backed billing.

Metering applies across the hosted model APIs, including Responses, the OpenAI- and Anthropic-compatible endpoints, audio, and decisions.

Guides

• Customer Tokens — Attribute requests to one of your users
• Customer Billing — Manage subscriptions, balances, and usage charges
• Tiers & Margins — Configure limits, pricing tiers, and margins
• Webhooks — React to billing and usage events