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POST
/
emails
/
validate
Validate an email address
curl --request POST \
  --url https://api.sendkit.dev/emails/validate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "user@example.com"
}
'
{
  "email": "jsmith@example.com",
  "is_valid": true,
  "evaluations": {
    "has_valid_syntax": true,
    "has_valid_dns": true,
    "mailbox_exists": true,
    "is_role_address": true,
    "is_disposable": true,
    "is_random_input": true
  },
  "should_block": true,
  "block_reason": "invalid_syntax",
  "validated_at": "2026-03-03 10:00:00"
}

Authorizations

​
Authorization
string
header
required

API key from your SendKit dashboard. Pass it as a Bearer token in the Authorization header.

Body

application/json
​
email
string<email>
required

The email address to validate.

Example:

"user@example.com"

Response

Validation result

​
email
string<email>

The email address that was validated.

​
is_valid
boolean

Whether the email address is considered valid.

​
evaluations
object

Detailed evaluation results.

​
should_block
boolean

Whether this email should be blocked from receiving emails.

​
block_reason
enum<string> | null

The reason the email should be blocked, if applicable.

Available options:
invalid_syntax,
invalid,
disposable_email,
null
​
validated_at
string

When the validation was performed.

Example:

"2026-03-03 10:00:00"