# Inworld AI

**Canonical:** https://apis.io/providers/inworld-ai/  
**Website:** https://inworld.ai  
**APIs profiled:** 7

Inworld AI is a real-time voice AI infrastructure provider. The Inworld platform delivers text-to-speech, speech-to-text, an end-to-end speech-to-speech Realtime API, and an OpenAI- and Anthropic-compatible LLM Router behind one API surface and one billing relationship. Inworld's voice models lead the Artificial Analysis Speech Arena and are used to power voice agents, language-learning apps, AI companions, avatar experiences, game NPCs, and Twilio-backed phone agents. The platform supports instant and professional voice cloning, voice design from natural language, lipsync-grade phoneme alignment, on-premise TTS deployment, and zero-data-retention configurations for regulated workloads.

## Kin Score — 66.6 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 66.6).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 74.9 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 78.9 |
| Developer Ergonomics | 76.2 |
| Commercial Clarity | 71.1 |
| Access Clarity | 71.1 |

## Agent readiness — 33.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (7)

- **Inworld AI Models API** — Discover available models.
- **Inworld AI Realtime API** — Realtime speech-to-speech sessions.
- **Inworld AI Speech To Text API** — Transcribe audio to text.
- **Inworld AI Text To Speech API** — Synthesize speech from text using Inworld voice models.
- **Inworld AI Voices API** — Voice cloning, design, and lifecycle.
- **Inworld AI Chat Completions API** — OpenAI-compatible chat completions through the LLM Router.
- **Inworld AI Routers API** — Named reusable routers with provider, conditional, and split rules.

## Agentic access (1)

- **Inworld Ai Agentic Access** — 16 operations · 9 acting

## Security (3)

- **Inworld Ai Authentication** — http · 2 schemes
- **Inworld Ai Domain Security** — TLSv1.3 · HSTS · DMARC
- **Inworld Ai Trust Center** — SOC 2, HIPAA, GDPR

## Plans (1)

- **Inworld Ai Plans Pricing**

## Tags

Artificial Intelligence, Voice, Text-to-Speech, Speech-to-Text, Real-Time, LLM Routing, Voice Cloning, Conversational AI, Game AI

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/inworld-ai/). Scores are computed from the provider's own public artifacts under a published rubric.