> ## Documentation Index
> Fetch the complete documentation index at: https://docs.enricho.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Billing API

> Credit balances, usage history, and hosted checkout and portal links.

Billing calls consume no directory credits and operate on the account associated with your API key.

* [Usage](https://docs.enricho.co/api-reference/usage.md): plan, monthly/purchased balances and UTC period dates.
* [History](https://docs.enricho.co/api-reference/usage-history.md): daily and per-feature credit consumption.
* [Plans](https://docs.enricho.co/api-reference/plans.md): unauthenticated live pricing catalog.
* [Plan checkout](https://docs.enricho.co/api-reference/checkout-plan.md): hosted subscription payment link.
* [Credit checkout](https://docs.enricho.co/api-reference/checkout-credits.md): hosted one-time credit purchase.
* [Portal](https://docs.enricho.co/api-reference/portal.md): payment methods, invoices and cancellation.

Monthly credits refill on the first of each calendar month UTC; unused monthly credits do not accumulate. Purchased top-ups never expire and are spent after monthly credits. `credits_remaining` includes both balances. Keys for the same account share that balance.

Checkout returns a payment URL, not a completed purchase. Open it and complete payment there. Plan changes and credits follow payment confirmation; check usage afterward. HTTP 200 from checkout creation is not payment success. Never send card data in these REST requests.

Current checkout catalog: Pro $20/month for 10,000 credits, Growth $49/month for 100,000, Scale $199/month for 500,000; one-time packs $25 for 10,000. Prices and account allowances can change: read the live plans, checkout response and account usage instead of hardcoding. Checkout credit figures come from the checkout catalog; live account allowances may differ.


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