# Reson8

**Canonical:** https://apis.io/providers/reson8/  
**Website:** https://www.reson8.dev/  
**APIs profiled:** 3

Reson8 (Resonate Labs B.V.) is a Balderton Capital-backed speech-recognition company offering an infrastructure-grade automatic speech recognition (ASR) API. Its differentiator is text-based, hyper-custom domain adaptation: feed up to ~1M tokens of domain vocabulary and a custom model adapts in under 60 seconds with no audio datasets or fine-tuning, cutting word error rate versus generic engines. The v1 API at api.reson8.dev provides realtime WebSocket streaming, turn-level events for conversational voice agents, prerecorded file transcription, speaker diarization, and custom-model phrase management across ten European languages, on EU-hosted infrastructure with zero audio retention.

## Kin Score — 45.8 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 45.8).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 60.1 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 51.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 38.2 (agent-ready)

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

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (3)

- **Reson8 Auth API** — Exchange an API key for a short-lived access token.
- **Reson8 Custom Models API** — Domain adaptation via custom phrase models.
- **Reson8 Speech to Text API** — Realtime, turn-level, and prerecorded transcription.

## MCP servers (1)

- **Reson8 MCP Server**

## Security (3)

- **Reson8 Authentication** — apiKey/http-bearer · 3 schemes
- **Reson8 Domain Security** — TLSv1.3 · HSTS · DMARC
- **Reson8 Trust Center** — trust center published

## Tags

Speech Recognition, Speech-to-Text, ASR, Voice AI, Transcription, Diarization, Machine-Learning, Developers

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/reson8/). Scores are computed from the provider's own public artifacts under a published rubric.