# Vocametrix

> Speech analysis API and clinical voice tools. Endpoints for pronunciation assessment, speech-to-text, text-to-speech, and acoustic voice quality metrics (AVQI, DSI, CPP, HNR, formants, jitter/shimmer, etc.), plus AI agents for speech therapy content generation.

Base URL: `https://platform.vocametrix.com`. Auth: `X-API-Key` header.

## Documentation

- [Full API reference](https://www.vocametrix.com/api-docs.txt) — all endpoints with parameters, responses, and curl examples.
- [Interactive docs (humans)](https://www.vocametrix.com/api-docs)
- [Pricing](https://www.vocametrix.com/pricing)
- [Sign up](https://www.vocametrix.com/registration)

## APIs

### Core Speech Analysis

- Pronunciation Assessment API
- Speech to Text API
- Text to Speech API

### Voice Quality Metrics

- Acoustic Voice Quality Index (AVQI) Calculator API
- Dysphonia Severity Index (DSI) Calculator API
- Cepstral Peak Prominence (CPP) Calculator API
- Multi-band Harmonics-to-Noise Ratio (HNR) Calculator API

### Advanced Voice Analysis

- Advanced Spectral Measures Calculator API
- Formant Statistics Analysis (F1-F4) Calculator API
- S/Z Ratio Analysis Calculator API
- Glottal-to-Noise Excitation Ratio (GNE) Calculator API
- H1*-H2* Voice Source Analysis API
- Voice Range Profile (VRP) Analysis
- Jitter & Shimmer Perturbation Analysis API v.03 (Scientifically Validated)
- Extended Acoustic Calculators (ABI, Voice Dynamics, Prosody Similarity)

### Audio Measures

- Audio Measures (Sound Level, eGeMAPS)

### Phoneme & Classification

- Phoneme & Audio Classification (Phonemes-Live, Stuttering, Estonian Vowel)

### Speech Coaching

- Speech Coaching Analysis API

### Therapy Planning

- Therapy Plan Generator API (Python workflow)

### AI Agents

- AI Agents