How it works
Every endpoint has a flat price in credits per fresh call, the same number shown on its docs page and in each response. This calculator multiplies your monthly calls by those prices for 1,995 endpoints, takes off the calls answered from cache (free, or 0.2 credit for a cached response over 100 KB), and prices the result on each credit pack. It also finds the cheapest mix of packs, since a bigger pack has a lower price per credit. The address bar updates as you go, so a link to this page carries your estimate; it holds endpoint names and numbers only.
New accounts get 1,000 free credits once. They reach only the open fetch path, so endpoints marked "needs a pack" are paid from a purchased pack (with a verified email), and this tool keeps the two apart. Credits never expire, so spare credits carry over, and failed or not-found calls are refunded, which means a real month can cost less than the estimate. The numbers are an estimate, not an invoice. See Pricing for the packs and Credits for how charging works.