Botoi Readability API review
A focused readability API with three scoring formulas and 150+ endpoints.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Botoi Readability API analyzes English text through a POST JSON endpoint and returns Flesch-Kincaid Grade, Flesch Reading Ease, and Gunning Fog scores. It also provides sentence, word, syllable, and complex-word counts, giving developers a focused way to add readability checks to CMS workflows, publishing systems, legal or medical drafting tools, and content analysis pipelines. Optional authentication and JSON responses support application-based integrations, while MCP server access is available across the published plans.
Pricing follows a freemium model. The Free plan costs $0 per month and includes all 150+ endpoints, MCP server access, JSON responses, and community support, with free usage subject to rate limits. Starter costs $9 per month and adds email support and a usage dashboard. Pro costs $49 per month and adds priority support, webhook notifications, and a 99.9% uptime SLA. Business costs $199 per month and includes dedicated support, webhook notifications, a usage dashboard, and the same 99.9% uptime SLA. All paid plans retain access to the 150+ endpoints and MCP server.
The product’s strength is its narrow, developer-oriented focus: teams can retrieve standardized readability scores and supporting counts in structured JSON rather than relying on a separate editorial interface. That makes it suitable for automated checks inside existing software, especially when English content is the target. Its scope is less suited to multilingual workflows, since the grade mapping is calibrated for English, and it does not provide AI features. Choose Botoi when an API-first readability layer and predictable plan progression are the priority; consider a broader tool when users need a wider language range or capabilities beyond readability analysis.
Botoi Readability API pros and cons
- Where it wins
- Three readability formulas plus sentence and word analysis
- Free plan includes all 150+ endpoints and JSON responses
- Paid plans add support, dashboards, webhooks, and an uptime SLA
- Where it doesn't
- Meaningful grade mapping is calibrated for English
- Free usage is rate-limited
- API-only delivery requires workflow integration
Botoi Readability API fact sheet, pricing and score →
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