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Oanor Readability API

oanor.com

From €6.80/mo Free plan API
Visit oanor.com
Spec score 7.8 #15 of 26 in AI Readability Checkers

Spec sheet

Purpose
The API scores text with six readability formulas: Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau and Automated Readability Index.Read 8 Oct 2026 · oanor.com
Support
The page offers private one-to-one support tickets, and plan descriptions include email support for Starter, priority support for Pro and a dedicated SLA for Mega.Read 8 Oct 2026 · oanor.com
Maker
The imprint identifies oanor.com as a service of Baduno GmbH, located in Frankfurt am Main, Germany.Read 8 Oct 2026 · oanor.com
Endpoints
The page lists GET /v1/analyze, GET /v1/syllables and GET /v1/meta.Read 8 Oct 2026 · oanor.com
Integration
The page provides curl, JavaScript, PHP and Python request examples; clients authenticate with an x-oanor-key header.Read 8 Oct 2026 · oanor.com
Processing
The product page says computation is local, with no network calls, and describes results as fast and deterministic.Read 8 Oct 2026 · oanor.com
Quota behavior
Plans use hard caps that return HTTP 429 above quota, with no overage charge; the page says plans are billed monthly and can be canceled anytime.Read 8 Oct 2026 · oanor.com
Returned data
Analysis returns the six scores, underlying text counts, an averaged grade level, estimated reading time and a plain-English reading-ease interpretation.Read 8 Oct 2026 · oanor.com
Security and privacy
The product FAQ says requests pass through an EU-based gateway, the upstream API key stays on the server, and no personal data is shared with the upstream provider beyond the request sent.Read 8 Oct 2026 · oanor.com
Syllable endpoint
A second endpoint counts syllables for a word or for every word in a phrase.Read 8 Oct 2026 · oanor.com
Test access
The browser playground offers 10 free test calls per day.Read 8 Oct 2026 · oanor.com
Use cases
The API is described for content and copywriting tools, SEO and editorial workflows, education, accessibility checks and UX-writing review.Read 8 Oct 2026 · oanor.com

Plans and prices

Free Free Free 2,340 calls/month · 2 requests/second · hard cap (429 above quota, no overage) · 6 formulas + counts · no credit card Read 8 Oct 2026 · oanor.com
Starter €6.80 a month €6.80 /month 46,500 calls/month · 8 requests/second · hard cap (429 above quota, no overage) · reading time + syllables · email support Read 8 Oct 2026 · oanor.com
Pro €21.50 a month €21.50 /month 238,000 calls/month · 20 requests/second · hard cap (429 above quota, no overage) · editorial & SEO pipelines · priority support Read 8 Oct 2026 · oanor.com
Mega €56.80 a month €56.80 /month 875,000 calls/month · 50 requests/second · hard cap (429 above quota, no overage) · content-platform scale · dedicated SLA Read 8 Oct 2026 · oanor.com

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