Account
Check your credits and see what changed in each data release.
See your credits
GET /v1/usage
Credits used and left, by day and by API key.
Parameters
| Name | In | Type | What it is |
|---|---|---|---|
from | query | string | First day to include, as YYYY-MM-DD. |
to | query | string | Last day to include, as YYYY-MM-DD. |
Answers
| Status | When | Body |
|---|---|---|
| 200 | Your credit usage. | object |
| 429 | Too many requests in a short time. Wait the number of seconds in Retry-After, then try again. | Problem |
See what changed in each data release
GET /v1/releases · no key needed
A release is a frozen snapshot of all Kadrin data, named by year and month (such as 2026.11), with a third number for a later release in the same month (such as 2026.11.1). Asking for the same release always gives the same answer, so you can rerun your work and get identical results. This list shows what changed in each release. No API key needed.
Answers
| Status | When | Body |
|---|---|---|
| 200 | Releases, newest first. | object |
| 429 | Too many requests in a short time. Wait the number of seconds in Retry-After, then try again. | Problem |