NumValidate
Data Validation
Open Source phone number validation
No keyHTTPS
Lob.com
US Address Verification
Verified 4 days ago: 100% uptime
API key
Required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 2733ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Lob.com. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Requires an API key. Check the docs for whether it goes in a header or a query parameter.
curl -s "https://lob.com/ENDPOINT" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from 2 public sources (public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
Other Data Validation APIs
See all 19 →Postman Echo
Data Validation
Test api server to receive and return value from HTTP method
No keyHTTPS
PurgoMalum
Data Validation
PurgoMalum is a free RESTful web service that filters and removes profanity and unwanted text from input. It supports customization options and can return the results in plain text, XML, or JSON formats.
No keyHTTPS
DataScreenIQ
Data Validation
Screen data for schema drift, type mismatches, and null rate anomalies
API keyCORSHTTPS
SpryTools Email Validation
Data Validation
Syntax + MX + disposable/role-based email validation
API keyCORSHTTPS
Temsor
Data Validation
Validates Turkish national ID, tax number, IBAN, phone, plate and parses addresses
API keyCORSHTTPS
Lob.com — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Lob.com free to use?
Lob.com is listed in our free catalogue, but it requires an API key, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does Lob.com need an API key?
Yes. Lob.com authenticates with an API key. Keep it server-side rather than in browser code, because anything in your frontend bundle is readable by anyone who opens developer tools.
Can I call Lob.com from browser JavaScript?
Not directly. Lob.com did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is Lob.com still working?
Yes, as of 2026-09-18. Our automated check reached Lob.com and recorded a 100% reliability score with a median response time of 2733 ms. We re-check on a schedule, and this page updates with the result.
Is Lob.com available over HTTPS?
Yes. Lob.com serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.