The playground
Try any of 817 endpoints — live.
Pick an endpoint, load a working example, tweak the params, and send — no signup to try. Results render the way the data deserves; raw JSON, headers & code are one tab away.
Playground demo key · api.reefapi.com
post/validate/v1/batch1 credit
Validate up to 100 mixed items ({type:vat|iban|email,value}) in one call.
Working example
Parameters
Up to 100 mixed validation items. Each is an object {type: vat|iban|email, value: <string>} (vat items may also carry a `country`). Each item is validated independently — a bad entry yields valid:false, it never fails the whole batch.
Whether to perform the live MX/DNS lookup (default true). Set false for a pure offline syntax+disposable check (no network, faster).
request preview
curl -X POST https://api.reefapi.com/validate/v1/batch \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"items":"[{\"type\":\"iban\",\"value\":\"DE89370400440532013000\"},{\"type\":\"email\",\"value\":\"[email protected]\",\"check_mx\":false},{\"type\":\"iban\",\"value\":\"bad\"}]"}'Hit Send to run this endpoint live.