Frequently asked questions
What is an API cost calculator?
An API cost calculator estimates the cost of API calls from expected request volume and a provider’s price per request or request bundle. It can also help compare traffic with a rate limit, quota, or spending budget.
How do I calculate API costs?
Convert the provider price to a per-request rate, multiply it by the expected number of billable requests, and add any retries or failed calls that are charged. For example, 1,000 requests at $1 per 1,000 requests cost $1 before retry overhead.
How much does 1 million API requests cost?
The price depends on the API provider and endpoint. Multiply the provider’s price per 1,000 requests by 1,000, or enter the per-million price directly in the calculator.
How do API rate limits work?
A rate limit caps how many requests an API accepts during a time window, often per minute. Compare your peak request rate—not only your monthly average—to the provider’s limit, and account for retries that also consume requests.
How do retries affect API costs?
Retries increase the total number of requests. If 100,000 normal requests have a 5% retry rate, the estimate adds 5,000 requests; those additional calls may also use quota and incur charges.
How can I prevent unexpected API costs?
Estimate normal traffic and retry behavior, set provider-side usage alerts and hard limits where available, monitor actual usage, and use timeouts, backoff, and idempotency to avoid unnecessary repeated calls.