ApyHub Readability Scores Documents API

What ApyHub Readability Scores Documents API is

ApyHub Readability Scores Documents API scores documents and publicly accessible web pages, returning a readability score, reading level and text statistics. Its file endpoint accepts PDF, DOC and DOCX uploads up to 100 MB per request. Results can include word, sentence, character and paragraph counts, average lengths, and estimated reading and speaking times. The score details include a grade class, a plain-language class label and an indication of whether a standard readability threshold is met. English uses the Flesch Reading Ease formula by default, while German uses the Wiener Sachtextformel. Listed uses include reviewing contracts, policies, manuals, help pages, websites, reports and proposals. The API is also available through ApyHub MCP for AI agents to check readability during content review. The product page offers five API calls a day free without a card. Its Starter plan costs nothing and includes 3,000 atoms per month, one API key, five requests per second, one team member and MCP access for Claude and Cursor. Pro costs $16 a month, and Pro+ costs $42 a month. ApyHub says it does not log request or response bodies and retains API call metadata for 90 days.

Who it suits

This API suits teams and developers who need readability scores for documents or public web pages. Its listed use cases and MCP access may also suit content reviewers and AI-agent workflows.

Limits

The free offer provides five API calls a day. Starter is free and includes 3,000 atoms per month, one API key, five requests per second, and one team member; exceeding the plan's per-second rate can return a 429 rate_limited error.

Getting started

1. Open the ApyHub Readability Scores Documents API page.
2. Use the free access offer of five API calls per day without a card, or choose a plan.
3. Send a PDF, DOC, or DOCX file to the file endpoint, or submit a publicly accessible page URL.
4. Use the API through ApyHub MCP for AI agent content reviews.

Verdict

ApyHub’s API returns readability measures and supporting text statistics, with file and public-page inputs. The free allowance and paid plans offer defined usage options, while rate limits are worth accounting for in request patterns.