Mail, DNS and web checks for developers and AI agents
Validate Mexican RFC numbers via API
Stage
Not given
Not given
Founded
Not given
Not given
Based in
DK
Not given
Pricing model
Not given
Freemium
Pricing
API checks from $0.002 to $0.08 per request in USDC. Browser checks are free and rate-limited. Bulk mail configuration checks at $0.024 per domain with minimum $0.03 per request.
Pay as you go: $0.015 USD per credit (prepaid, no subscription). Monthly plans: Basic $99/month for 10,000 credits, Growth $449/month for 60,000 credits, Pro $1,800/month for 300,000 credits. Enterprise: volume pricing available on request. /sat-lists endpoint is free on any plan. New users get $5 U
Key features
SPF, DMARC, DKIM and MX record checks
DNS record inspection with TTL and resolver information
TLS certificate checking
Security headers analysis
Free browser-based checks
Pay-per-request API in USDC
Bulk mail checks for up to 20 domains
Explained findings with evidence and freshness data
DNSSEC validation checking
Full RFC validation with registration status, name, postal code, and digital certificates
Taxpayer profile lookup with personal data and contact information
Postal code lookup for CFDI invoicing
Quick verification with single SAT roundtrip in 1-2 seconds
Compliance checking against SAT contributor lists (Articles 69, 69-B, 69-B Bis)
Bulk verification of up to 5000 records in one call
Digital certificate lookup with serial numbers and validity dates
Commerce registry lookup for company legal regime and shareholders
What makes it different
Read-only checks of public DNS and mail configuration with plain language explanations
Fixed prices known before payment
Structured results with machine-readable schemas for AI agents
Directly connected to SAT database for real-time validation
Supports both individual and business RFC numbers with automatic type detection
Shared account and balance with CURP and voter ID validation services
Lookproof
RFCCheck