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ApyHub Readability Scores Documents API

apyhub.com

From $16/mo Free plan API
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Spec score 8.2 #5 of 26 in AI Readability Checkers

What it is

ApyHub Readability Scores Documents API scores documents and publicly accessible web pages, returning a readability score, reading level, and text statistics. File requests accept PDF, DOC, or DOCX uploads up to 100 MB. English checks use the Flesch Reading Ease formula by default, while German uses the Wiener Sachtextformel. Results can include word, sentence, character, and paragraph counts, average lengths, and estimated reading and speaking times. The score includes a grade class, a plain-language label, and an indication of whether a standard readability threshold is met. ApyHub lists uses such as reviewing contracts, policies, manuals, help pages, websites, reports, and proposals; AI agents can also access the API through ApyHub MCP for content reviews. The product page offers five API calls a day free without a card. Starter is free and includes 3,000 atoms per month; Pro costs $16 a month and Pro+ $42 a month. Requests can return a 429 rate_limited error when the plan's per-second limit is exceeded.

Spec sheet

Purpose
Scores documents and web pages for readability and returns a score, reading level, and text statistics.Read 7 Oct 2026 · apyhub.com
Privacy
ApyHub says it does not log API request or response bodies and retains API call metadata logs for 90 days.Read 7 Oct 2026 · apyhub.com
Support
ApyHub lists a Discord community, email, live chat with agents, and a 24/7 AI assistant as support channels.Read 7 Oct 2026 · apyhub.com
Headquarters
Amsterdam, NetherlandsRead 28 Sep 2026 · apyhub.com
Data location
ApyHub says primary data is stored in AWS Frankfurt, with backups replicated to Dublin.Read 7 Oct 2026 · apyhub.com
File inputs
The file endpoint accepts PDF, DOC, or DOCX uploads up to 100 MB per request.Read 7 Oct 2026 · apyhub.com
Free access
The product page offers five API calls a day for free without a card.Read 7 Oct 2026 · apyhub.com
Integration
The API is available through ApyHub MCP for AI agents to check document or page readability during content review.Read 7 Oct 2026 · apyhub.com
Languages
English uses the Flesch Reading Ease formula by default, while German uses the Wiener Sachtextformel.Read 7 Oct 2026 · apyhub.com
Rate limits
Requests can return a 429 rate_limited error when the plan's per-second rate is exceeded.Read 7 Oct 2026 · apyhub.com
Returned metrics
Results can include word, sentence, character, and paragraph counts, average lengths, and estimated reading and speaking times.Read 7 Oct 2026 · apyhub.com
Score details
The readability result includes a score, grade class, plain-language class label, and a boolean label indicating whether a standard readability threshold is met.Read 7 Oct 2026 · apyhub.com
Use cases
ApyHub lists checking contracts and policies, reviewing manuals and help pages, auditing website readability, and scoring reports and proposals as use cases.Read 7 Oct 2026 · apyhub.com
Web input
The URL endpoint scores publicly accessible web pages.Read 7 Oct 2026 · apyhub.com

Plans and prices

Starter Free 3,000 atoms/month · 1 API key · 5 req/sec · 1 team member · MCP access (Claude / Cursor) Read 7 Oct 2026 · apyhub.com
Pro $16 a month 100,000 atoms/month · 10 API keys · 5 req/sec · 5 team members · top up atoms anytime · MCP access (Claude / Cursor) Read 7 Oct 2026 · apyhub.com
Pro+ $42 a month 500,000 atoms/month · 10 API keys · 10 req/sec · 5 team members · top up atoms anytime · MCP access (Claude / Cursor) Read 7 Oct 2026 · apyhub.com

Every ApyHub Readability Scores Documents API plan and price →

Strong points and limits

Strong points

  • Accepts PDF, DOC, and DOCX files up to 100 MB
  • Scores publicly accessible web pages
  • Returns reading levels and text statistics
  • Five daily API calls free without a card
  • Available through ApyHub MCP

Limits

  • Requests can return 429 errors when rate limits are exceeded
  • File inputs are limited to PDF, DOC, or DOCX
  • English and German use different listed formulas

Who it suits

This API suits teams or developers who need readability scores and text statistics for documents or public web pages. Its listed use cases include reviewing policies, help content, reports, and proposals.

Verdict

The API returns both a readability classification and supporting text metrics for files and public pages. The free allowance and rate limit are worth considering alongside expected request volume.

Where Specifiction places it

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