Rhymes & Syllables API
Rhymes, syllable counts and pronunciation for English words, plus syllable counting for whole texts (per word and per line, with haiku detection). Perfect for songwriting, poetry and readability tools.
Authentication & base URL
Subscribe through one of our marketplace listings; your marketplace API key and base URL are shown there. All endpoints return JSON over HTTPS, served from a global edge network (typically 20–150 ms).
Endpoints
GET /v1/rhymes/{word}
Rhyming words
| Parameter | In | Description | Example |
|---|---|---|---|
word * | path | English word | love |
syllables | query | Only rhymes with this number of syllables | |
limit | query | 1-200 (default 50) | 50 |
all | query | true to include rare words and proper names | false |
GET /v1/syllables
Count syllables in a text
| Parameter | In | Description | Example |
|---|---|---|---|
text * | query | Text (lines separated by \n), max 20,000 characters | An old silent pond
A frog jumps into the pond
Splash! Silence again |
Example
GET /v1/rhymes/love?limit=10
{
"word": "love",
"pronunciation": {
"arpabet": "L AH1 V",
"ipa": "lˈʌv"
},
"syllables": 1,
"count": 7,
"rhymes": [
"dove",
"above",
"shove",
"glove",
"thereof",
"foxglove",
"truelove"
],
"notice": "WordNet 3.0 Copyright 2006 by Princeton University (https://wordnet.princeton.edu/license-and-commercial-use). Pronunciations: CMU Pronouncing Dictionary."
}Rhymes, syllable counts and pronunciation for English words, plus syllable counting for whole texts (per word and per line, with haiku detection). Perfect for songwriting, poetry and readability tools.
Use cases
Songwriting and rap lyric tools, poetry and haiku apps, readability formulas (Flesch-Kincaid needs syllables), word games, text-to-speech and pronunciation helpers.
Data: WordNet 3.0 (Copyright Princeton University, free for commercial use) and the CMU Pronouncing Dictionary.
Pricing
Free plan 500 requests/month, Pro 25,000 for $4.99, Ultra 150,000 for $14.99.
Pricing
Free plan with 500 calls per month, then Pro (25,000 calls for $4.99/month) and Ultra (150,000 calls for $14.99/month). See all plans.