Verify PIX key existence
Bulk-checks whether each supplied PIX key exists in the DICT directory (§8.2.23 Verificar Existência de Chaves). accountId resolves the caller’s ISPB only - it does not scope the answer - and keys carries 1 to 200 values; a batch outside those bounds is refused before any DICT call, with 400 PIX-0061 naming keys.
What comes back is existence and nothing else: each row is a key plus an exists flag. It does not say who holds a key, whether YOU hold it, or whether it can be claimed, so it is not the pre-check for a claim - POST /v1/entries is, because that is what turns a key DICT already knows into the claim-pending row POST /v1/claims requires. Use this to sift a list of keys, for example before a batch payout. The response also echoes DICT’s own jdpiReturnedAt and correlationId, which are the values support asks for.
Authorizations
JWT bearer token issued by the identity provider.

