mxverify API alternatives

Dollar value of one followed backlink from any website, with the published model behind it. If it doesn't fit your project, here are the 10 best free Development APIs to use instead in 2026, out of 240 in the directory.

For reference, mxverify API: 100% uptime (30 days) · Callable from the browser (CORS) · HTTPS.

1. 1

   Quotable API

   Online · 377 ms

   Random quotes with authors and tags.

   • No API key needed
   • 100% uptime (30 days)
   • Fast: 377 ms response
   • Callable from the browser (CORS)

   No authHTTPSCORS
2. 2

   Sonar API

   Online · 327 ms

   Project Sonar DNS Enumeration API.

   • No API key needed
   • 100% uptime (30 days)
   • Fast: 327 ms response
   • Callable from the browser (CORS)

   No authHTTPSCORS
3. 3

   jsDelivr API

   Online · 492 ms

   Package info and download stats on jsDelivr CDN.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   latest@ API

   Online · 1155 ms

   Latest versions and end-of-life dates for 500+ software products.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Agify.io API

   Online · 1148 ms

   Estimates the age from a first name.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   24 Pull Requests API

   Online · 1994 ms

   Project to promote open source collaboration during December.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7A

   AgentPay Domain Lookup API

   Online · 909 ms

   DNS records, WHOIS/RDAP, IP ownership and domain reports for AI agents, paid per call via x402.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   AnswerLine API

   Online · 1138 ms

   Answers, citations and sources from AI assistants and Google surfaces through one API.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
9. 9

   ApicAgent API

   Online · 1520 ms

   Extract device details from user-agent string.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
10. 10

    APIzone API

    Online · 1440 ms

    Independent uptime & status monitoring for 200+ popular APIs.

    • No API key needed
    • 100% uptime (30 days)
    • Callable from the browser (CORS)
    • HTTPS

    No authHTTPSCORS

mxverify API vs alternatives

mxverify API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
mxverify	Required	Yes	Yes	100%	1366 ms	Not rated
Quotable	No	Yes	Yes	100%	377 ms	Not rated
Sonar	No	Yes	Yes	100%	327 ms	Not rated
jsDelivr	No	Yes	Yes	100%	492 ms	Not rated
latest@	No	Yes	Yes	100%	1155 ms	Not rated
Agify.io	No	Yes	Yes	100%	1148 ms	Not rated
24 Pull Requests	No	Yes	Yes	100%	1994 ms	Not rated
AAgentPay Domain Lookup	No	Yes	Yes	100%	909 ms	Not rated
AnswerLine	Required	Yes	Yes	100%	1138 ms	Not rated

See also: best Development APIs · all Development APIs