Text Analysis API

Text Analysis Freemium View on RapidAPI ↗

30+ text analysis endpoints — readability scoring, word frequency, keyword density, passive voice detection, extractive summarization, and text similarity. Pure algorithmic, no ML.

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30 endpoints
The in-depth APIMemo review for this API hasn't been published yet — the data below comes straight from the public marketplace listing.

Text Analysis API endpoints

MethodEndpointDescription
Text - Readability
POST /api/text_coleman_liau
/api/text_coleman_liau 		Calculate Coleman-Liau readability index
POST /api/text_flesch_ease
/api/text_flesch_ease 		Calculate Flesch Reading Ease score (0-100)
POST /api/text_dale_chall
/api/text_dale_chall 		Calculate Dale-Chall readability score (uses syllable count > 2 as difficult word proxy)
POST /api/text_readability_all
/api/text_readability_all 		Calculate all 7 readability scores in one call
POST /api/text_gunning_fog
/api/text_gunning_fog 		Calculate Gunning Fog readability index
POST /api/text_flesch_kincaid
/api/text_flesch_kincaid 		Calculate Flesch-Kincaid grade level readability score
POST /api/text_smog
/api/text_smog 		Calculate SMOG readability index
POST /api/text_ari
/api/text_ari 		Calculate Automated Readability Index
Text - Statistics
POST /api/text_avg_sentence_length
/api/text_avg_sentence_length 		Calculate average words per sentence
POST /api/text_speaking_time
/api/text_speaking_time 		Estimate speaking time at configurable WPM (default 130)
POST /api/text_reading_time
/api/text_reading_time 		Estimate reading time at configurable WPM (default 200)
POST /api/text_avg_word_length
/api/text_avg_word_length 		Calculate average characters per word
POST /api/text_word_count
/api/text_word_count 		Count words, sentences, paragraphs, and characters
POST /api/text_syllable_count
/api/text_syllable_count 		Count total syllables and average per word
Text - Analysis
POST /api/text_passive_voice
/api/text_passive_voice 		Detect passive voice constructions (was/were/been/being + past participle patterns)
POST /api/text_sentence_complexity
/api/text_sentence_complexity 		Classify sentences as simple, compound, or complex based on length and conjunctions
POST /api/text_unique_words
/api/text_unique_words 		Count unique words and calculate Type-Token Ratio
POST /api/text_paragraph_stats
/api/text_paragraph_stats 		Per-paragraph word count, sentence count, and average sentence length
POST /api/text_adverb_count
/api/text_adverb_count 		Count and list adverbs (words ending in -ly, excluding common exceptions)
POST /api/text_word_frequency
/api/text_word_frequency 		Get top N most frequent words
POST /api/text_repeated_phrases
/api/text_repeated_phrases 		Find repeated 2-4 word phrases
POST /api/text_keyword_density
/api/text_keyword_density 		Calculate keyword frequency and density percentage for each word
Text - Transform
POST /api/text_strip_markdown
/api/text_strip_markdown 		Remove markdown formatting from text
POST /api/text_count_chars
/api/text_count_chars 		Character count with and without spaces, plus breakdown by type
POST /api/text_extract_numbers
/api/text_extract_numbers 		Extract all numbers (integers and decimals) from text
POST /api/text_summarize_extractive
/api/text_summarize_extractive 		Extract top N sentences by importance using word frequency scoring
POST /api/text_extract_emails
/api/text_extract_emails 		Extract all email addresses from text
POST /api/text_extract_urls
/api/text_extract_urls 		Extract all URLs from text using regex
Text - Similarity
POST /api/text_cosine
/api/text_cosine 		Calculate cosine similarity using word frequency vectors
POST /api/text_jaccard
/api/text_jaccard 		Calculate Jaccard similarity between two texts (intersection/union of word sets)

Text Analysis API pricing

PlanPriceRate limitQuotas
BASIC Free —
  • Requests: 100 / monthly
PRO $9.99 / month —
  • Requests: 5,000 / monthly (then $0.0100 each)
ULTRA $29.99 / month —
  • Requests: 50,000 / monthly (then $0.0100 each)
MEGA $49.99 / month —
  • Requests: 500,000 / monthly (then $0.0100 each)

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