Developers

A clean API for email verification

Versioned REST, API-key auth, per-key rate limits, and HMAC-signed webhooks. Verify one or a million.

# Verify a single email
curl -X POST https://api.sendgrade.com/v1/verify \
  -H "X-API-Key: sg_live_..." \
  -H "Content-Type: application/json" \
  -d '{"email":"john@gmail.com"}'

# → { "result": { "status": "valid", "score": 100, ... } }

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Real-time + bulk

POST /v1/verify for one, /v1/verify/bulk for files — async with progress.

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Webhooks

Subscribe to job.completed, credits.low and more, HMAC-signed.

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OpenAPI docs

Interactive reference with try-it-out. Open docs →