Full-suite SEO platform centered on Domain Authority · Pricing: $99 – $599 / mo
Moz Pro and SEO Score API both touch SEO, but they are different shapes of product. Moz Pro is a Web app + Moz Links API; SEO Score API is a hosted REST API that returns a scored audit as JSON in about two seconds. This page is an honest side-by-side — including when you should pick Moz Pro over us. Still shopping around? See our roundup of Moz Pro alternatives organized by use case.
| Feature | Moz Pro | SEO Score API |
|---|---|---|
| Starting price | $99 / mo | $0 free, $5+ / mo paid |
| Site audits | Scheduled crawls | On-demand single URL or batch |
| API access | Moz Links API (separate) | Single unified API for everything |
| Domain Authority score | Yes (signature metric) | No |
| AI readability / GEO checks | No | Yes (every audit) |
| SXO / AEO / AIO scores | No | Yes (Starter+) |
| Keyword research | Yes | No |
| CI/CD friendly | Limited | GitHub Action + SDKs |
| Free tier | 30-day trial | 5 audits/day, no card |
| Time to first result | Sign-up + onboarding | API key in seconds |
When developers search for the Moz API, they almost always mean the Moz Links API — the endpoint that returns Domain Authority, Page Authority, spam score, and backlink metrics. That is a link-data API. SEO Score API is an audit API: give it a URL and it returns 82 scored on-page, technical, performance, accessibility, and AI-readability checks as JSON in about two seconds. They solve different problems, so the right call depends on what you were reaching for Moz to do.
| What you need | Moz Links API | SEO Score API |
|---|---|---|
| Primary data | Domain/Page Authority, backlinks, spam score | Scored on-page + technical audit, 82 checks |
| Free tier | Limited rows per month, Moz account required | 5 audits/day, no card |
| Auth | Signed/token request | Single X-API-Key header |
| Response | Link-metrics JSON | Scored audit JSON + priorities |
| Domain Authority | Yes (its signature metric) | No |
| Best for | Link & DA research, reporting | Automated site-health audits in code & CI |
The Moz Links API has a limited free allowance tied to a Moz account, then bills by row volume — enough to experiment with, not to audit every page on every deploy. If you were reaching for the Moz API to grade page health rather than pull link metrics, SEO Score API's free tier (5 audits a day, no credit card) is a closer fit, and paid plans start at $5/mo for 200 audits.
If what you wanted from the Moz API was a programmatic read on a page's SEO, here is the entire request — one endpoint, one header, JSON back in about two seconds:
curl "https://seoscoreapi.com/audit?url=https://example.com" \
-H "X-API-Key: ssa_your_key_here"The response carries an overall score, a letter grade, every check that passed or failed, and a priorities array of the highest-impact fixes — the shape you'd drop straight into a Google Sheet, a client report, or a CI gate.
For backlinks and Domain Authority, nothing is a like-for-like swap; Ahrefs or Moz's own data still lead there. But if your Moz API calls were really about auditing — titles, meta, headings, schema, speed, accessibility — point your code at /audit instead. Teams moving audit workloads off the Moz API typically cut that line item 20–95%, and because the free tier needs no card you can port a script and test it today. Grab a free key and run the curl above against a URL you already track.
For audits, yes. The Moz Links API is built around backlink and Domain Authority data; the SEO Score API is built around on-page and technical SEO audits — 82 checks per URL returned as scored JSON. If you were calling the Moz API to grade or monitor page health (not to pull link metrics), SEO Score API is a direct, cheaper swap: a free tier, $5/mo for 200 audits, and a JSON response in about two seconds. Get an API key in seconds, no card required.
It depends what you called it for. For link metrics and Domain Authority there's no exact substitute (Ahrefs or the Moz data still lead there). But if you used it for audit, scoring, or SEO-health checks, point your code at the SEO Score API instead — same idea, one unified endpoint, SDKs for Python and Node, a GitHub Action, and pricing that starts free. Most teams migrating off the Moz API for audit workloads cut their bill 20–95%.
Only if you use Moz primarily for site audits. We don't track Domain Authority and we don't do keyword research. If those are core to your workflow, stay on Moz or move to Ahrefs.
Moz Pro starts at $99/month. SEO Score API has a free tier and starts at $5/month for 200 audits. For audit-only workloads, the savings are 20–95% depending on volume.
No. We score on-page and technical SEO, AI readability, performance, and accessibility. DA is Moz's proprietary metric and we don't replicate it.
Yes — every audit returns a `priorities` array of the highest-impact fixes, sorted by what would move the score most.
Audit your site free — no Moz Pro subscription, no credit card.
Score any URL across 82 checks in one API call. Free tier, key in seconds.