Base path: https://api.1toolring.com/api/v1/email/verify

Auth: Authorization: Bearer <key>. Price: 105 credits per chargeable address. A catch_all or unknown verdict, a cache hit, and a failed call charge 0.

Endpoints

Verify one address

curl -X POST https://api.1toolring.com/api/v1/email/verify \
  -H "Authorization: Bearer $TOOLRING_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email":"[email protected]"}'

{
  "data": {
    "email": "[email protected]",
    "quality": "good",
    "result": "ok",
    "resultcode": 1,
    "subresult": "",
    "is_free": false,
    "is_role": false,
    "is_disposable": false,
    "did_you_mean": "",
    "credits_used": 105,
    "cached": false,
    "checked_at": "2026-11-01T09:00:00Z"
  }
}

What is charged

A repeat of the same address within 7 days is served from cache with cached: true and charged 0. The X-ToolRing-Credits response header carries the amount actually charged.

Bulk jobs

curl -X POST https://api.1toolring.com/api/v1/email/verify/bulk \
  -H "Authorization: Bearer $TOOLRING_KEY" \
  -F "[email protected]"

{
  "data": {
    "id": "vjob_abc123",
    "status": "running",
    "filename": "emails.csv",
    "row_count": 1200,
    "counts": { "ok": 0, "catch_all": 0, "disposable": 0, "invalid": 0, "unknown": 0, "verified": 0 },
    "credits_charged": "0",
    "created_at": "2026-11-01T09:00:00Z",
    "finished_at": null,
    "report_ready": false
  }
}

A job is capped by the wallet: it never verifies more addresses than the balance covers. Poll GET /jobs/{job_id} until report_ready is true, then download GET /jobs/{job_id}/report?filter=ok.

Errors