Unif API Docs

List free email provider domains

Page through the 4,768 free email provider domains (the list HubSpot forms block with "Block free email providers", snapshot 2026-10-10), sorted alphabetically. Filter with `q` or sync the whole list with `limit=1000` to block free providers in your own code. Costs 0 credits.

Pricing — Free

This endpoint returns billing metadata with zero credits charged.

GET
/email/free-domains

Authorization

bearerAuth
AuthorizationBearer <token>

UnifAPI API key. Provider credentials are managed by UnifAPI.

In: header

Query Parameters

q?string

Only return domains containing this text, e.g. hotmail.

Length1 <= length <= 253
cursor?string

Zero-based offset cursor returned as next_cursor.

limit?integer
Range1 <= value <= 1000
Default100

Header Parameters

Unifapi-Version?"2026-07-01"

Pin the API version an integration was built against (date-based, e.g. 2026-07-01). Omit to use the current version. Public URL paths stay stable and unversioned; breaking changes ship under a new dated version and are announced with Deprecation and Sunset response headers. The served version is echoed in every response's Unifapi-Version header. Policy: https://unifapi.com/versioning.md

Default"2026-07-01"

Value in

  • "2026-07-01"

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X GET "https://example.com/email/free-domains"
{  "request_id": "string",  "data": [    "string"  ],  "pagination": {    "has_more": true,    "next_cursor": "string"  },  "billing": {    "credits_charged": 0,    "records_charged": 0,    "balance_remaining": 0,    "truncated_due_to_balance": true  }}