Commercial card grading API
Add AI condition grading to your trading card app, marketplace or workflow. One card, front and back, counts as one grade.
Start with 7 days of unlimited grading. A payment method is required. Your selected monthly plan starts automatically after the trial; cancel before it ends to avoid the first charge. One trial per API account.
$250 USD / month
$0.0500 per card at full usage
$449 USD / month
$0.0449 per card at full usage
Grading only. These plans exclude card identification, authentication, price estimates and market analysis. Unused monthly grades do not roll over. AI grades are estimates, not certified grades.
New here? Create an API account with a contact email. Already have a key? Use that same account to subscribe and keep your prepaid balance.
The key stays in memory for this page only. Re-enter it after returning from checkout. Never put it in a URL.
Paste this into your coding agent. Replace the name and email with yours. Your agent prepares the integration; you enter payment details only on Stripe.
Set up CardGrader.AI commercial grading for my app [APP NAME], using billing email [MY EMAIL]. Read https://cardgrader.ai/api-docs and https://cardgrader.ai/api-terms. I want the 7-day unlimited grading-only trial, then $250/month for 5,000 complete front/back card grades. Use the MCP server https://cardgrader.ai/mcp and start_grading_trial, or register once with commercialOnly=true at POST /v1/agents and call POST /v1/subscriptions/checkout with plan grading_5000. Reuse my existing API key if I have one. Save the key securely, show me the Stripe checkout link and billing terms, and wait for me to finish checkout. Never ask for card details in chat. After I finish, check my balances and trial expiry, then test one front/back card with grade_card or POST /v1/grades. Use a unique Idempotency-Key and store the result. Identification and market data are not included; never spend prepaid credits without asking me.
Buy prepaid API credits for those requests. They are tracked separately from monthly grades, including when both are on the same account.
API documentation and quickstart · API data and privacy · OpenAPI specification · Agent integration guide
Per card. Send one front photo and one back photo in the same request; that uses one grade.
Use POST /v1/grades for subscription grading. Use POST /v1/scans with prepaid credits for identification, grading with identification, or full analysis. GET /v1/agents/me reports each balance separately.
Yes. Manage billing lets you cancel future renewals and update your payment method. Plan changes start at the next renewal and do not reset the current allowance.
We automatically charge your selected monthly price after seven days. A successful payment starts your 5,000- or 10,000-grade monthly allowance. If you cancel before trial end, there is no first charge and unlimited access ends at the trial deadline. An unpaid trial does not retain grading access. Returning subscribers do not receive a second trial.
There is no grade-count cap during the seven-day trial. Submit one card at a time per API account; the usual API rate limits apply to protect service for all customers.
We give at least 14 days' notice before changing your subscription price. Prices for future prepaid credit-pack purchases may change at any time. See the API terms.