Legal

Terms of service

Last updated November 4, 2026. CardMods is operated by RocketOpp LLC (“we”). Using cardmods.com or its API means you agree to these terms.

What CardMods is

A data product: market observations, signals and model predictions about trading cards, served through an API and a dashboard. It is information, not advice. Prices move, models are wrong some of the time, and our public scorecard shows how often. Buying and selling decisions are yours.

Plans and billing

Plans are monthly, billed through Stripe, and renew until cancelled. Each plan has a daily call limit; calls over it answer with an error, not a surprise charge. You can change or cancel your plan from the dashboard at any time; cancellation takes effect at the end of the paid period.

Your keys and your use

API keys are yours to protect. Do not share one key across customers of your own, resell raw responses as a feed, scrape the site, or use the data to harass sellers or buyers. We may suspend keys that abuse the service or threaten its stability.

Connected eBay accounts

Connecting eBay is optional and read-only. You are responsible for your eBay account and for following eBay’s own terms. We act only within the permissions you grant and you can remove them at any time.

No warranty, limited liability

The service is provided as is. To the extent the law allows, we are not liable for losses from trading decisions, downtime, or errors in the data, and our total liability to you is limited to what you paid us in the three months before the claim.

Changes and contact

We may update these terms; the date above changes when we do, and continued use means acceptance. Questions: hello@cardmods.com. See also the privacy policy.