Pay for what you call
Prepaid credits, no subscription. One successful call is one credit, failed requests cost nothing, and credits never expire.
Higher volume
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Custom pack sizes, higher rate limits, and invoicing for teams making millions of calls.
Every pack includes
- Every documented endpoint, no tiering
- Errors are never charged — only successful calls
- Per-key rate limits and IP allowlists
- Key rotation with a 24-hour grace period
- GST invoice on every recharge
130 endpoints and 417 individual calculations are available on every plan. Browse the documentation →
Questions
- What counts as one credit?
- One successful API call. It does not matter how many calculations you ask for in it — requesting six keys in one call costs one credit, where six separate calls would cost six.
- Am I charged for failed requests?
- No. A 4xx caused by your request and a 5xx caused by us both cost nothing. Every response carries X-Credits-Charged so you can see exactly what was billed.
- Do credits expire?
- No. Buy once and use them whenever. There is no monthly commitment and nothing to renew.
- What happens when I run out?
- Calls return 402 Payment Required with a clear message, and your keys keep working. Recharge and they resume immediately — no new key needed.
- Can I try before paying?
- Create an account and generate a key without a card. Trial credits are granted where enabled, and the documentation shows a real response for every endpoint before you spend anything.
Get your API key
No card needed to get a key.