API PLANFree
Free
Low-volume evaluation and personal integrations.
Free
View pricing and service details →KERVONI DEVELOPERS
API & agent-ready services
Use Kervoni's deterministic calculators from software, automation and agent workflows. Paid API plans are available through secure checkout. Request a free evaluation key from support.
API PLANPro
Pro
Higher-volume production integrations.
149 TL / 30 days
View pricing and service details →API PLANBusiness
Business
Higher-volume business integrations.
499 TL / 30 days
View pricing and service details →Available interfaces
REST API/api/v1/calculate
MCP/mcp
A2A/a2a
What is already built
Per-client API keys are stored as hashes, can be revoked, and share atomic minute and rolling 24-hour quota enforcement across REST, MCP and A2A.
Receiving your API key
Your 30-day access starts after PayTR confirms payment. Return to the payment result page in the same browser and select “Get my API key”. Copy and store the key securely; it is shown once. Generating a replacement invalidates the old key and preserves usage and expiry.
Send the key as an Authorization: Bearer header. /api/v1/usage reports your remaining quota and access expiry without consuming calculator quota. Expired or revoked access is rejected. If you lose the payment browser session, contact support with your order reference.