LibreTranslate

Free and open-source machine translation REST API supporting 30+ languages with self-hostable deployment and no third-party service dependency. Powered by the open-source Argos Translate library, LibreTranslate provides endpoints for text translation, language detection, file translation, and translation suggestions. Deployable on-premise for full offline capability or accessible via the managed hosted service.

LibreTranslate publishes 2 APIs on the APIs.io network: misc API and translate API. Tagged areas include Translation, Machine Translation, Natural Language Processing, Open Source, and Self-Hosted.

The LibreTranslate catalog on APIs.io includes 1 Spectral governance ruleset.

LibreTranslate’s developer surface includes documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.9/100 thin ▼ -6.3 Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

2 APIs

TranslationMachine TranslationNatural Language ProcessingOpen SourceSelf-Hosted

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 40.9/100 · thin

Contract Quality 12.1 / 25

Developer Ergonomics 2.2 / 20

Commercial Clarity 10.0 / 20

Operational Transparency 2.7 / 13

Governance 7.0 / 12

Discoverability 6.9 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/libre-translate: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

Examples 5

Example request and response payloads for these APIs.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: libre-translate
name: LibreTranslate
description: Free and open-source machine translation REST API supporting 30+ languages with self-hostable deployment and
  no third-party service dependency. Powered by the open-source Argos Translate library, LibreTranslate provides endpoints
  for text translation, language detection, file translation, and translation suggestions. Deployable on-premise for full
  offline capability or accessible via the managed hosted service.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/libre-translate.png
url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Translation
- Machine Translation
- Natural Language Processing
- Open Source
- Self-Hosted
apis:
- aid: libre-translate:libre-translate-misc-api
  name: LibreTranslate misc API
  description: The misc API from LibreTranslate — 3 operation(s) for misc.
  humanURL: https://libretranslate.com
  baseURL: https://libretranslate.com
  tags:
  - misc
  properties:
  - type: OpenAPI
    url: openapi/libre-translate-misc-api-openapi.yml
  - type: Documentation
    url: https://docs.libretranslate.com
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/translate-request.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/translate-response.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/detect-request.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/language.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/vocabulary/vocabulary.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-ld/jsonld.json
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/finops/finops.yml
- aid: libre-translate:libre-translate-translate-api
  name: LibreTranslate translate API
  description: The translate API from LibreTranslate — 4 operation(s) for translate.
  humanURL: https://libretranslate.com
  baseURL: https://libretranslate.com
  tags:
  - translate
  properties:
  - type: OpenAPI
    url: openapi/libre-translate-translate-api-openapi.yml
  - type: Documentation
    url: https://docs.libretranslate.com
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/translate-request.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/translate-response.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/detect-request.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-schema/language.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/vocabulary/vocabulary.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/json-ld/jsonld.json
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/finops/finops.yml
common:
- type: AgenticAccess
  url: agentic-access/libre-translate-agentic-access.yml
- type: DomainSecurity
  url: security/libre-translate-domain-security.yml
- type: Website
  url: https://libretranslate.com
- type: Documentation
  url: https://docs.libretranslate.com
- type: GitHubOrg
  url: https://github.com/LibreTranslate
- type: LinkedIn
  url: https://www.linkedin.com/company/libretranslate
- type: Blog
  url: https://community.libretranslate.com
- type: Pricing
  url: https://portal.libretranslate.com
- type: StatusPage
  url: https://status.libretranslate.com
- type: X
  url: https://x.com/libretranslate
- type: Plans
  url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/plans/plans.yml
- type: RateLimits
  url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/rate-limits/rate-limits.yml
- type: FinOps
  url: https://raw.githubusercontent.com/api-evangelist/libre-translate/refs/heads/main/finops/finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

LibreTranslate

Kin Score

APIs 2

LibreTranslate misc API

LibreTranslate translate API

Pricing Plans 1

Plans

Rate Limits 1

Rate Limits

FinOps 1

Finops

Spectral Rules 1

LibreTranslate API Rules

JSON Schema 4

DetectRequest

Language

TranslateRequest

TranslateResponse

Examples 5

Detect Language

List Languages

Translate Auto Detect

Translate Batch

Translate Text

Security Posture 1

Libre Translate Domain Security

Agentic Access 1

Libre Translate Agentic Access

Resources