API archive entry · source-reported
PurgoMalum
Content validator against profanity & obscenity
Other Data Validation APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
NumValidate
Open Source phone number validation
No auth · HTTPS reported · CORS Unknown
Postman Echo
Test api server to receive and return value from HTTP method
No auth · HTTPS reported · CORS Unknown
invowerk
Validate e-invoices (ZUGFeRD, Factur-X, XRechnung, Peppol BIS) and get a validation report
API key · HTTPS reported · CORS Unknown
SpryTools Email Validation
Syntax + MX + disposable/role-based email validation
API key · HTTPS reported · CORS Unknown
Lob.com
US Address Verification
API key · HTTPS reported · CORS Unknown
SchemaShield
Read-only preflight for breaking schema changes and downstream query impact
API key · HTTPS reported · CORS Unknown
How to compare them
Coverage
Compare exact endpoints, fields, geography, history, and update frequency.
Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
Review attribution, redistribution, retention, privacy, and commercial-use terms.
Source reference
This page separates source-reported facts from questions that need live provider verification.