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

# Billing

> How ParseTx billing works.

ParseTx uses a generous free tier plus pay-as-you-go model powered by Stripe Metered Billing.

* **Free Sandbox Key:** 5,000 transactions / month, no credit card required.
* **Pay-as-you-go Production Key:** \$0.001 per transaction starting from the first request (covering worker invocation, KV cache indexing, and database usage logs).
* **Predictable Billing:** You are billed a flat fee per transaction returned. There are no complex credits or multipliers.

Your API key usage is aggregated and synced to your Stripe invoice every 6 hours.

<Warning>
  **Cost Protection Limits**

  To protect you from runaway loops or accidental billing spikes, all standard API keys have an internal daily safety limit on raw processing overhead. Because ParseTx heavily utilizes sub-millisecond caching, this limit rarely impacts normal usage (even at hundreds of thousands of transactions per day). However, if you are continuously sending completely random, uncached strings, the system will temporarily pause your key to protect your wallet.

  If you receive a `429 Daily system safety limit exceeded` error and need your cap raised for a massive historical backfill, please contact support.
</Warning>

## Manage Subscription & Cancellation

You can manage your payment methods, view past invoices, or cancel your subscription at any time via the Stripe Customer Portal.

[Manage My Billing](https://billing.stripe.com/p/login/14AeVfcyM3Ucd6DeisdIA00)

*(Note: Cancellations take effect at the end of the current billing cycle. Any pending metered usage will be billed on your final invoice.)*