Native apps for the tools agencies live in, plus a REST API and webhooks for everything else.
Connect once, verify any Smart List or tag in a click, and write valid/invalid/risky tags + scores back to contacts. Use "Verify Email" as a native workflow action.
Verify emails on Gmail, Apollo, LinkedIn and Hunter with one click, or right-click any address → "Verify with SendGrade".
Drop an HTTP Request node onto /v1/verify — or import our ready-made template to verify Google Sheets contacts and write results back.
Trigger verification from any Zap via Webhooks and route results into Airtable, Notion, HubSpot and more.
Use the HTTP module to call the SendGrade API in any scenario — same pattern as n8n.
Build anything: versioned /v1/ API, per-key rate limits, and HMAC-signed webhooks on job + credit events. Read the docs →