APIVerve

APIVerve vs MXToolbox

Looking for an MXToolbox alternative you can call from code? Compare APIVerve's email & DNS APIs against MXToolbox on programmatic access, pricing, and what each is actually built for. An honest, capability-by-capability breakdown.

  • MXToolbox alternative
  • API-first
  • Free tier
Explore APIVerve APIs→Compare pricing
Head to head
8APIVerve wins
9Ties
1MXToolbox wins

Across 18 compared capabilities · 100 free credits/mo to try.

Platform overview

The fundamental difference

Understanding what sets APIVerve and MXToolbox apart.

AV

APIVerve

Email & DNS APIs, developer-first

Winner

Programmatic SPF, DKIM, DMARC, DNSSEC, MX and blacklist checks over one REST API and MCP — with automated risk scoring and DKIM key-strength analysis baked into every result, on a free tier.

Key strengths
  • Free REST API for every check
  • SPF, DKIM, DMARC, DNSSEC, MX & blacklist under one key
  • Automated risk scoring & DKIM key-strength analysis
  • Homograph / IDN spoof detection
  • Native MCP tools for AI agents
  • Typed SDKs, Postman & consistent JSON
  • 300+ other APIs on the same subscription
M

MXToolbox

Email & DNS Monitoring Tools

The best-known suite of email and DNS diagnostics — SPF, DKIM, DMARC, blacklist and MX lookups through a web UI, with continuous monitoring and alerting as its paid core. Programmatic access is metered: a small free lookup allowance, with paid plans for higher volume.

Key strengths
  • Established, trusted brand for email diagnostics
  • Continuous scheduled monitoring & alerting
  • Deep real-time blacklist (RBL) coverage
  • Free web-based lookup tools
Common issues
  • Free API allowance is small; volume needs a paid plan
  • UI-first — not built for app or agent integration
  • No official SDKs — build your own REST integration
  • No MCP / AI-agent tooling
  • Single-purpose: email & DNS diagnostics only
The toolkit

The APIs behind these results

Every advantage above is a live endpoint you can call today — one key covers all of them, plus 300+ more.

DKIM ValidatorNew/v1/dkimvalidator5 cr→SPF ValidatorNew/v1/spfvalidator5 cr→DMARC ValidatorNew/v1/dmarcvalidator5 cr→DNSSEC Checker/v1/dnsseccheck5 cr→MX Lookup/v1/mxlookup5 cr→IP Blacklist Lookup/v1/ipblacklistlookup5 cr→Punycode Converter/v1/punycode1 cr→
Detailed comparison

Feature by feature

Every capability, side by side. Green marks the winner.

Email & DNS Checks

The core diagnostics both tools perform

CapabilityAPIVerveMXToolbox
SPF record validationParse and validate the sender policy record
DKIM record validationLook up and check the DKIM selector record
DKIM key-strength & weakness scoringDecode the public key, flag short or revoked keys and test-mode flags
DMARC policy parsingValidate the record and interpret the p=/sp= policy
DNSSEC chain validationConfirm the DNSSEC chain of trust resolves
MX record lookupResolve and list mail exchanger records
Blacklist (RBL) lookupCheck an IP or domain against blacklists
Automated risk scoring on resultsChecks return a computed risk score & level, not just raw records
Homograph / IDN spoof detectionFlag look-alike domains that mix writing systems
Continuous monitoring & alertingScheduled re-checks, blacklist alerts and historical dashboards — MXToolbox's core strength

Built for Automation

Using the checks from your own app, backend, or agent

CapabilityAPIVerveMXToolbox
Free programmatic API accessBoth offer a free API tier to start — APIVerve's spans every check under one key
Consistent JSON schema across toolsOne predictable response shape for every check
Native MCP tools for AI agentsEvery check exposed as a callable agent tool
Typed SDK librariesFirst-party SDKs with type definitions
One key across all checks + 300+ APIsSingle subscription covers the whole catalog

Pricing & Value

What it costs to actually integrate

CapabilityAPIVerveMXToolbox
Programmatic access on a free tierBoth let you call the API before paying
One price for email, DNS & 300+ other APIsNo separate add-on for API access
Pay only for successful callsFailed requests don't count against quota
The bottom line

APIVerve or MXToolbox?

These tools are built for different jobs. MXToolbox is a hosted product that continuously monitors your mail and DNS records and alerts you when something changes — if you want a dashboard watching your domain, that's what it's for. APIVerve isn't a monitoring service; it's the developer-first way to run the same SPF, DKIM, DMARC, DNSSEC, MX and blacklist checks from your own code or an AI agent, on a free tier, with automated risk scoring and DKIM key-strength analysis built into every result. Use MXToolbox to watch your domain; use APIVerve to build those checks into your product.

MXToolbox questions.

Common questions about switching from MXToolbox to APIVerve.

Talk to us →
Is APIVerve a free MXToolbox alternative?
Both offer a free API tier — the difference is scope and generosity. APIVerve gives you SPF, DKIM, DMARC, DNSSEC, MX and blacklist lookups (plus 300+ other APIs) under one key with monthly free credits, while MXToolbox's free API is a small metered lookup allowance. Where MXToolbox still leads is continuous monitoring and alerting; APIVerve is on-demand.
Can APIVerve replace the MXToolbox API?
For on-demand email and DNS lookups inside your own app, backend, or AI agent, yes. If you specifically need scheduled monitoring, blacklist-removal alerting, and historical dashboards, MXToolbox is purpose-built for that — APIVerve returns point-in-time results.
Does APIVerve check blacklists like MXToolbox?
Yes, via the IP Blacklist Lookup API. MXToolbox monitors more RBLs continuously and alerts you on changes; APIVerve gives you a point-in-time check you can call programmatically whenever you need it.
What does APIVerve add that MXToolbox doesn't?
Automated risk scoring on results, DKIM key-strength analysis, homograph / IDN spoof detection, native MCP tools for AI agents, first-party typed SDKs, and one key that also covers 300+ other APIs.
How do I switch from MXToolbox?
There's nothing to migrate — grab an APIVerve key and call the REST or MCP endpoints for the checks you need. Most teams are pulling SPF, DKIM and DMARC results in minutes.

Ready to switch from MXToolbox? Join thousands of developers who moved to APIVerve for better pricing, reliability, and developer experience.

Start free→Contact sales

Scaling up?

Volume pricing, custom SLAs, and dedicated support for high-traffic teams.

Contact sales