Botoi Readability API

Free plan API

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What Botoi Readability API is

Botoi Readability API analyzes English text and returns Flesch-Kincaid Grade, Flesch Reading Ease, Gunning Fog, and underlying counts. Send a required text string to POST /v1/text/readability; the endpoint responds with JSON. Flesch Reading Ease uses a 0–100 scale, where higher values indicate easier reading, while Gunning Fog estimates the years of formal education needed to understand a text. Botoi recommends submitting at least 100 words because short samples can produce unstable scores. The formulas and syllable heuristics are calibrated for English, so grade mappings are not meaningful for other languages. Suggested uses include enforcing plain-language standards, reviewing legal or medical drafts, improving blog posts for SEO, and comparing authors’ writing. Integration examples are available for cURL, JavaScript, TypeScript, Python, and Go. The free plan costs nothing and lists 1,000 requests per day and 10 requests per minute; the endpoint page separately states a 5-request-per-minute free tier with no credit card required. Paid plans start at $9 a month.

Who it suits

It suits developers building English-language text checks into writing or review workflows. Teams handling legal, medical, SEO, or cross-author comparisons may find its scores and counts useful.

What it does well

Returns three readability scores and underlying counts
JSON response from a documented POST endpoint
Examples cover five programming languages
Free plan lists 1,000 requests per day

What to know first

Scores are calibrated for English
Short texts can produce unstable scores
Free-tier rate limits are stated inconsistently

Limits

The Free plan lists 1,000 requests per day and 10 requests per minute, while the endpoint page says the free tier allows 5 requests per minute. Requests beyond a per-minute or daily cap receive HTTP 429; daily limits reset at midnight UTC.

Plans

Plan	Billed and limits	Price
Free	1,000 requests/day · 10 req/min · All 150+ endpoints · MCP server access · JSON responses · Community support	Free
Business	1,000,000 requests/day · 1,000 req/min · All 150+ endpoints · MCP server access · JSON responses · Dedicated support · Usage dashboard · Webhook notifications · 99.9% uptime SLA · Custom rate limits	$199 a month
Pro	100,000 requests/day · 300 req/min · All 150+ endpoints · MCP server access · JSON responses · Priority support · Usage dashboard · Webhook notifications · 99.9% uptime SLA	$49 a month
Starter	10,000 requests/day · 30 req/min · All 150+ endpoints · MCP server access · JSON responses · Email support · Usage dashboard	$9 a month

As botoi.com lists them, read 7 Oct 2026. The maker's own page has the final word.

Getting started

Open the Botoi Readability API page.
Choose the Free plan or a paid plan.
Send a required text string to POST /v1/text/readability.
Use a cURL, JavaScript, TypeScript, Python, or Go example to integrate the request.

Verdict

Botoi provides a focused API for English readability analysis, with multiple scoring methods and examples for common integration languages. Check the applicable free-tier rate limit before relying on it for a request volume.

Questions

How much does Botoi Readability API cost?

The Free plan costs nothing. Paid plans start with Starter at $9 a month.

What does the Free plan include?

The pricing page lists 1,000 requests per day and 10 requests per minute. The endpoint page separately says the free tier allows 5 requests per minute without a credit card.

Which languages does it support?

Its formulas and syllable heuristics are calibrated for English. The grade mapping is not meaningful for other languages.

What does the API return?

It returns Flesch-Kincaid Grade, Flesch Reading Ease, Gunning Fog, and underlying counts as JSON.

What integration examples are available?

The product page provides cURL, JavaScript, TypeScript, Python, and Go examples.

Who makes Botoi?

Botoi is a product of Savi Business Management LLC, with a listed address in Sharjah Media City, Sharjah, United Arab Emirates.

Facts from Botoi Readability API's own pages

Company: Botoi is a product of Savi Business Management LLC, with a listed address in Sharjah Media City, Sharjah, United Arab Emirates. · botoi.com, 7 Oct 2026
Data protection: The privacy policy says Botoi uses TLS encryption in transit and supports international transfers with safeguards including Standard Contractual Clauses where applicable. · botoi.com, 7 Oct 2026
DPA: Business customers processing their own users’ personal data through the API can request a Data Processing Agreement by email. · botoi.com, 7 Oct 2026
Endpoint: The endpoint is POST /v1/text/readability, accepts a required text string, and returns JSON. · botoi.com, 7 Oct 2026
English calibration: The formulas and syllable heuristics are calibrated for English, and the grade mapping is not meaningful for other languages. · botoi.com, 7 Oct 2026
Free access: The endpoint page says the free tier includes 5 requests per minute with no credit card required. · botoi.com, 7 Oct 2026
Input guidance: Botoi recommends sending at least 100 words because short snippets can produce unstable scores. · botoi.com, 7 Oct 2026
Integration: The product page provides cURL, JavaScript, TypeScript, Python, and Go examples. · botoi.com, 7 Oct 2026
Plan limits: The general pricing page lists the Free plan at 1,000 requests per day and 10 requests per minute. · botoi.com, 7 Oct 2026
Privacy: Botoi says API request and response payloads are not stored beyond the time needed to fulfill the request, while API usage metadata is logged. · botoi.com, 7 Oct 2026
Purpose: The Readability API analyzes English text and returns Flesch-Kincaid Grade, Flesch Reading Ease, Gunning Fog, and underlying counts. · botoi.com, 7 Oct 2026
Rate limits: Requests exceeding a per-minute or daily cap receive HTTP 429, and daily limits reset at midnight UTC. · botoi.com, 7 Oct 2026
Scoring details: Flesch Reading Ease ranges from 0 to 100, with higher scores indicating easier reading; Gunning Fog estimates years of formal education needed. · botoi.com, 7 Oct 2026
Use cases: Botoi suggests using the API to enforce plain-language standards, review legal and medical drafts, optimize blog posts for SEO, and compare writing across authors. · botoi.com, 7 Oct 2026

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