Intro

Detect disposable, temporary, and risky email addresses in real time.

Authentication

All API requests require an API key passed via the Authorization header:

Authorization: Bearer istmp_live_xxxxxxxxxxxxxxxxxxxx

Create and manage API keys from your dashboard.

Go to API Keys in your dashboard

Click Create API Key

Rate limits are determined by your plan. Every response includes headers:

X-RateLimit-Limit — max requests allowed in the current period

X-RateLimit-Remaining — requests remaining

X-RateLimit-Period — the billing period (monthly, daily)

When the limit is exceeded, the API returns 429 Too Many Requests.

Some response fields are only available on paid plans:

Feature	Free ($0)	Pro ($19)	Ultra ($59)	Mega ($149)
`is_tmp` / `result` / `decision`	✓	✓	✓	✓
`risk_score`	✓	✓	✓	✓
`signals` + `reasons`	—	✓	✓	✓
API call history	—	14 days	90 days	180 days
Team seats	—	—	✓	✓
Priority support	—	—	—	✓
Requests/month	100	2,500	10,000	30,000
Per-second limit	1 req/s	—	—	—