# Unbabel

**Canonical:** https://apis.io/providers/unbabel/  
**Website:** https://unbabel.com  
**APIs profiled:** 6

Unbabel is a Language Operations (LangOps) platform that combines always-on AI translation with on-demand human review to localize customer support, marketing, and other business content at scale. Its long-standing developer surface is the Unbabel Translation API (tapi/v2, base https://api.unbabel.com/tapi/v2), an asynchronous REST API where callers submit text with a source/target language pair, tone, and topic, then retrieve the completed AI-plus-human translation by uid or via a callback. Unbabel also offers a pure machine-translation path (mt_translation) and helper resources for language pairs, tones, topics, word count, and account details. Unbabel has since launched the standalone LLM-based product Widn.AI (its own RESTful API at widn.ai) and, following its combination with TransPerfect, its research and models (TowerLLM, COMET, Widn.AI) now also feed the GlobalLink platform; the tapi/v2 Translation API remains the documented developer surface at developers.unbabel.com.

## Kin Score — 29.6 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: falling (-10.4 from 40.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 13.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 47.4 |
| Access Clarity | 47.4 |

## Agent readiness — 19.8 (agent-aware)

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

## Access

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

## APIs (6)

- **Unbabel Account API** — Authenticated customer account information.
- **Unbabel Language Pairs API** — Supported source-to-target language combinations.
- **Unbabel Machine Translation API** — Pure machine-translation jobs, optionally upgradeable to human review.
- **Unbabel Tone and Topic API** — Available tones and topics/domains for a translation.
- **Unbabel Translation API** — Submit and manage AI-plus-human translation jobs.
- **Unbabel Word Count API** — Billable word count calculation for a block of text.

## Agentic access (1)

- **Unbabel Agentic Access** — 13 operations · 5 acting

## Security (4)

- **Unbabel Authentication** — apiKey · 1 scheme
- **Unbabel Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Unbabel Vulnerability Disclosure** — disclosure policy published
- **Unbabel Trust Center** — ISO 27001, GDPR

## Plans (1)

- **Unbabel Plans Pricing**

## Tags

Translation, Localization, Language Operations, LangOps, Machine Translation, Human-in-the-Loop, Artificial Intelligence

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