Free
No card required
$0/ month
- Monthly credits
- 250
- Burst limit
- 10 / 10s
- All protection signals
- Dashboard and API keys
- Credits reset every month
Know which signups to allow, review, or block.
Check an email or domain for disposable providers, missing mail servers, role accounts, typos, and suspicious patterns.
- 250 free checks a month
- no card required
Every email signal in one API response
Disposable domains, free subdomains, missing mail servers, role accounts, typos, and relay addresses. One check returns them all with a default action.
block
john@tempmail.lol"disposable":true
The inbox expires in minutes. Nothing you send there will ever be read.
Send an address, branch on the action
POST an email or domain with a bearer key. The response carries allow, review, or block, the main reason for it, and every raw signal for your logs.
POST
/api/v1/checkcurl -s -X POST 'https://signupscore.com/api/v1/check' \
-H 'Authorization: Bearer ss_…' \
-H 'Content-Type: application/json' \
-d '{"input":"name@tempmail.com"}'{
"request_id": "01J…",
"action": "block",
"primary_reason": "DISPOSABLE",
"signals": {
"disposable": true,
"public_provider": false,
"role_based": false,
"suspicious": false,
"privacy_relay": false,
"dynamic_dns": false,
"has_mx": true,
"suggested_domain": null,
"normalized_email": "name@tempmail.com",
"mailbox_alias": false,
"has_spf": true,
"has_dmarc": false
}
}Change policy without changing code
Domain rules, relays, dynamic DNS, junk usernames and new-domain thresholds all live in the dashboard.
Protection policy
- Trusted partner domain
- Always allow
- Disposable domain
- Block
- Domain younger than 14 days
- Review
Incoming signup
founder@brand-new.dev
- Domain age
- 6 days
- MX record
- found
Review
Pick the monthly volume you need
Every plan returns the same signals from the same endpoint, drawing on one credit balance. Pro raises that balance and lifts the rate limit.
Pro
$0.48 per 1,000 checks
$12/ month
- Monthly credits
- 25,000
- Burst limit
- 500 / 10s
- Everything in Free
- Bulk checks
- 90-day decision log
- Cancel anytime
Free email tools
Run a single lookup without an account.
Try
Check an address or domain
Diagnose email delivery
- Deliverability testReview the DNS records that affect email delivery.
- SPF, DKIM & DMARCInspect email authentication records.
- BIMI checkerCheck the record behind the logo and blue checkmark in Gmail.
- Email header analyzerTrace message routing and authentication results.
- Blacklist checkerCheck domain and IPv4 addresses against common DNSBLs.
FAQ
The docs go deeper on the response contract and the order rules are read in.
Read the docs