Speechace

API

Pronunciation and fluency scoring API for English, Spanish and French learners

Price: Free trial, then from $40/month
Access: API key (key query parameter)

About

Scores recorded speech at word, syllable and phoneme level, plus fluency, and maps results to IELTS, PTE, TOEIC and CEFR. Six dialects: US and UK English, Spain and Mexico Spanish, France and Canada French; stress and intonation in English only. The API key arrives by email per region.

What you can do with it

Score a learner's pronunciation of a word or sentence down to each phoneme
Grade read-aloud fluency or spontaneous speech on IELTS, PTE or CEFR scales
Check pronunciation in English (US, UK), Spanish (ES, MX) or French (FR, CA) only

Get started

Pick an API plan and start its free trial
Use the API key and regional base URL from the welcome email
POST the audio with the expected text to score/text

Example

curl --location -g "https://api.speechace.co/api/scoring/text/v9/json?key=$SPEECHACE_KEY&dialect=en-us" \
  --form 'text="Some parents admire famous athletes as strong role models."' \
  --form 'user_audio_file=@"recording.wav"'

Details

Hosting: Hosted service
Available in: Worldwide
MCP server: None