Validate a batch of email addresses
Check up to 50 addresses for whether they can receive mail, and for the signals that make one worth mailing. Billed per address.
The response publishes a verdict alongside the flags it was drawn from. Branch on the verdict: the two obvious readings of the flags are both wrong — a free-provider address (is_personal) and a role mailbox (is_role_address) are ordinary, deliverable addresses that real customers use, and refusing them would shrink a list for no reason. is_disposable is the only flag that lowers a verdict.
unknown means DNS did not answer in time, so that address was NOT checked. It is a separate value from undeliverable on purpose — acting on the two together deletes live contacts over a network hiccup.
The 50-address ceiling is a latency bound, not a payload one: every distinct DOMAIN in the batch costs a DNS round trip. To validate a whole list, use POST /api/v1/lists/{id}/validation-runs, which runs as a background job.
Requires the validation:write scope — Check whether email addresses can receive mail — this is billed per address.
API key authentication. Use a sk_* (FULL) or pk_* (SENDING_ONLY) key as the bearer token. Public keys (pk_*) are restricted to the email-send endpoints and the self-serve list subscribe/unsubscribe pair; every other endpoint — event tracking included — answers 403 for them. In scope terms (used by /api/v1/* operations): FULL keys hold every scope; SENDING_ONLY keys hold only emails:send.
In: header
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
Response Body
application/json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
curl -X POST "https://example.com/api/v1/email-validations" \ -H "Content-Type: application/json" \ -d '{ "emails": [ "user@example.com" ] }'{
"results": [
{
"email": "string",
"verdict": "deliverable",
"is_disposable": true,
"is_role_address": true,
"is_personal": true,
"has_mx_records": true,
"reasons": [
"string"
]
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}