DeepL

DeepL is an AI-powered translation service that delivers high-quality machine translation between dozens of languages, with support for context-aware translation, document translation, glossaries, and rephrasing/improvement via DeepL Write. The DeepL API is offered in Pro and Free tiers and exposes endpoints for text translation, document translation, glossaries, language metadata, usage, and write/rephrase.

DeepL publishes 7 APIs on the APIs.io network, including Voice API, Documents API, Glossaries API, and 4 more. Tagged areas include Artificial Intelligence, Deep Learning, Glossary, Localization, and Machine-Learning.

The DeepL catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 3 Spectral governance rulesets.

DeepL’s developer surface includes authentication, developer portal, documentation, pricing, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.1/100 developing ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Artificial Intelligence Deep Learning Glossary Localization Machine-Learning Machine Translation Translation

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 49.1/100 · developing

Contract Quality 15.3 / 23

Developer Ergonomics 8.8 / 18

Access Clarity 10.0 / 18

Operational Transparency 0.9 / 12

Contract Governance 3.1 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/deepl: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 7

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

DeepL Voice API

The DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime issues an ephemeral token and WebSocket streaming URL; clients then ope...

DeepL Documents API

The Documents API from DeepL — 3 operation(s) for documents.

DeepL Glossaries API

The Glossaries API from DeepL — 4 operation(s) for glossaries.

DeepL Languages API

The Languages API from DeepL — 1 operation(s) for languages.

DeepL Translate API

The Translate API from DeepL — 1 operation(s) for translate.

DeepL Usage API

The Usage API from DeepL — 1 operation(s) for usage.

DeepL Write API

The Write API from DeepL — 1 operation(s) for write.

Scroll for all 7

Postman Collections 7

Ready-to-run Postman collections for exercising this provider's APIs.

DeepL Translation Documents API

POSTMAN

DeepL Translation Documents Glossaries API

POSTMAN

DeepL Translation Documents Languages API

POSTMAN

DeepL Translation Documents Translate API

POSTMAN

DeepL Translation Documents Usage API

POSTMAN

DeepL Translation Documents Voice API

POSTMAN

DeepL Translation Documents Write API

POSTMAN

Scroll for all 7

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

DeepL Translation Documents API

OPEN COLLECTION

DeepL Translation Documents Glossaries API

OPEN COLLECTION

DeepL Translation Documents Languages API

OPEN COLLECTION

DeepL Translation Documents Translate API

OPEN COLLECTION

DeepL Translation API

OPEN COLLECTION

DeepL Translation Documents Usage API

OPEN COLLECTION

DeepL Translation Documents Voice API

OPEN COLLECTION

DeepL Translation Documents Write API

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Deepl Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Deepl Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Deepl Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

DeepL Voice API - WebSocket Streaming

WebSocket streaming API for real-time voice transcription and translation. After obtaining a streaming URL and token via the REST API (POST /v3/voice/realtime), establish a WebS...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Deepl Context

3 classes · 9 properties

JSON-LD

Spectral Rules 3

Spectral governance rulesets for linting and validating these APIs.

DeepL API Rules

5 rules · 1 errors 4 warnings

SPECTRAL

DeepL API Rules

5 rules · 4 warnings 1 info

SPECTRAL

DeepL API Rules

5 rules · 2 errors 3 warnings

SPECTRAL

JSON Schema 2

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

DeepL Glossary

7 properties

JSON SCHEMA

DeepL Translation

1 properties

JSON SCHEMA

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Deepl Authentication

apiKey · 1 scheme

SECURITY

Deepl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Deepl Vulnerability Disclosure

security.txt · contact published

SECURITY

Deepl Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Deepl Agentic Access

15 operations · 6 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Vocabulary

Vocabulary

Build 3

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

SDKs

SDKs

SDKs

SDKs

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Authentication

Authentication

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: deepl
name: DeepL
url: https://raw.githubusercontent.com/api-evangelist/deepl/refs/heads/main/apis.yml
kind: company
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/deepl.png
tags:
- Artificial Intelligence
- Deep Learning
- Glossary
- Localization
- Machine-Learning
- Machine Translation
- Translation
tags_raw:
- Artificial Intelligence
- Deep Learning
- Glossaries
- Localization
- Machine Learning
- Machine Translation
- Translation
created: '2024-11-07'
modified: '2026-05-30'
specificationVersion: '0.23'
description: DeepL is an AI-powered translation service that delivers high-quality machine translation between dozens of languages,
  with support for context-aware translation, document translation, glossaries, and rephrasing/improvement via DeepL Write.
  The DeepL API is offered in Pro and Free tiers and exposes endpoints for text translation, document translation, glossaries,
  language metadata, usage, and write/rephrase.
apis:
- aid: deepl:deepl-voice-api
  name: DeepL Voice API
  description: The DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime issues
    an ephemeral token and WebSocket streaming URL; clients then open a WSS channel to stream source audio chunks and receive
    incremental source-language transcriptions, translated transcriptions, and (closed beta) synthesized translated audio.
    There is no documented webhook callback URL on the REST APIs; document translation remains polling-based.
  humanURL: https://developers.deepl.com/api-reference/voice
  baseURL: https://api.deepl.com/v3
  tags:
  - Real-Time
  - Speech-to-Text
  - Streaming
  - Transcription
  - Translation
  - Voice
  - WebSocket
  properties:
  - type: Documentation
    url: https://developers.deepl.com/api-reference/voice
  - type: Reference
    url: https://developers.deepl.com/api-reference/voice/websocket-streaming
  - type: OpenAPI
    url: openapi/deepl-voice-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/deepl-voice-api-asyncapi.yml
  - type: AsyncAPI
    url: https://developers.deepl.com/api-reference/voice.asyncapi.yaml
- aid: deepl:deepl-documents-api
  name: DeepL Documents API
  description: The Documents API from DeepL — 3 operation(s) for documents.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/deepl-documents-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
- aid: deepl:deepl-glossaries-api
  name: DeepL Glossaries API
  description: The Glossaries API from DeepL — 4 operation(s) for glossaries.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags:
  - Glossary
  tags_raw:
  - Glossaries
  properties:
  - type: OpenAPI
    url: openapi/deepl-glossaries-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
- aid: deepl:deepl-languages-api
  name: DeepL Languages API
  description: The Languages API from DeepL — 1 operation(s) for languages.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags:
  - Language
  tags_raw:
  - Languages
  properties:
  - type: OpenAPI
    url: openapi/deepl-languages-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
- aid: deepl:deepl-translate-api
  name: DeepL Translate API
  description: The Translate API from DeepL — 1 operation(s) for translate.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags:
  - Translate
  properties:
  - type: OpenAPI
    url: openapi/deepl-translate-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
- aid: deepl:deepl-usage-api
  name: DeepL Usage API
  description: The Usage API from DeepL — 1 operation(s) for usage.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/deepl-usage-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
- aid: deepl:deepl-write-api
  name: DeepL Write API
  description: The Write API from DeepL — 1 operation(s) for write.
  humanURL: https://developers.deepl.com/
  baseURL: https://api.deepl.com/v2
  tags: []
  tags_raw:
  - Write
  properties:
  - type: OpenAPI
    url: openapi/deepl-write-api-openapi.yml
  - type: Documentation
    url: https://developers.deepl.com/docs
  - type: Reference
    url: https://developers.deepl.com/docs/api-reference
  - type: JSONSchema
    url: json-schema/deepl-translation.json
  - type: JSONSchema
    url: json-schema/deepl-glossary.json
  - type: Rules
    url: rules/deepl-translation-api-rules.yml
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/deepl/overview
- type: AgenticAccess
  url: agentic-access/deepl-agentic-access.yml
- type: TrustCenter
  url: security/deepl-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/deepl-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/deepl-domain-security.yml
- type: Authentication
  url: authentication/deepl-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/deepl
- type: Website
  url: https://www.deepl.com/
- type: Portal
  url: https://developers.deepl.com/
- type: Documentation
  url: https://developers.deepl.com/docs
- type: Authentication
  url: https://developers.deepl.com/docs/getting-started/auth
- type: Pricing
  url: https://www.deepl.com/pro
- type: SDKs
  url: https://github.com/DeepLcom/deepl-python
- type: SDKs
  url: https://github.com/DeepLcom/deepl-node
- type: TermsOfService
  url: https://www.deepl.com/pro-license
- type: PrivacyPolicy
  url: https://www.deepl.com/privacy
- type: JSONLD
  url: json-ld/deepl-context.jsonld
- type: Vocabulary
  url: vocabulary/deepl-vocabulary.yml
- type: Integrations
  url: https://www.deepl.com/en/integrations
- type: LlmsText
  url: https://developers.deepl.com/llms.txt
- url: https://www.deepl.com/en/blog/rss.xml
  type: Blog
integrations:
- name: DeepL
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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