Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/papago-papago-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
OpenAPI Specification
openapi: 3.2.0
info:
description: Naver Papago translation REST API for translating text between Korean, English, Japanese, Chinese, and other Asian and European languages using Neural Machine Translation (NMT) algorithms. Supports text translation, language detection, and romanization of Korean names.
version: 1.2.0
title: Translation Papago API
termsOfService: https://developers.naver.com/products/terms
contact:
name: Naver Cloud Platform Support
url: https://www.ncloud.com/support/question
license:
name: Naver Open API Terms
url: https://developers.naver.com/products/terms
servers:
- url: https://openapi.naver.com/
tags:
- name: Papago
description: Naver Machine Learning Translation APIs
paths:
/v1/papago/n2mt:
post:
tags:
- Papago
summary: Papago NMT Translation
description: Translates text using Neural Machine Translation (NMT). Accepts source and target language codes along with the text to translate. Supports Korean, English, Japanese, Chinese (Simplified and Traditional), Vietnamese, Thai, Indonesian, French, Spanish, Russian, German, and Italian — up to 5,000 characters per request.
operationId: papago.nmt
responses:
'200':
description: Translation successful
content:
application/json:
schema:
$ref: '#/components/schemas/TranslationResponse'
'400':
description: Bad request — invalid parameters
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized — invalid or missing credentials
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'429':
description: Too many requests — rate limit exceeded
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
security:
- clientId: []
- clientSecret: []
requestBody:
content:
application/x-www-form-urlencoded:
schema:
type: object
properties:
source:
type: string
default: ko
description: 'Source language code. Examples: ko (Korean), en (English), zh-CN (Chinese Simplified), zh-TW (Chinese Traditional), ja (Japanese), vi (Vietnamese), th (Thai), id (Indonesian), fr (French), es (Spanish), ru (Russian), de (German), it (Italian)'
target:
type: string
default: en
description: Target language code. Same possible values as source. Must form a supported language pair.
text:
type: string
default: 나는 한국인입니다.
description: Text to translate. UTF-8 encoding only. Maximum 5,000 characters per request.
honorific:
type: string
default: 'false'
description: Honorific language mode for Korean output. Set to true to use honorific (formal) Korean.
glossaryKey:
type: string
description: Glossary key to apply custom terminology during translation.
required:
- source
- target
- text
/v1/language/translate:
post:
tags:
- Papago
summary: Papago SMT Translation
description: Translates text using Statistical Machine Translation (SMT). Accepts source and target language codes and the text to translate. Supports Korean, English, Japanese, Chinese (Simplified and Traditional).
operationId: papago.smt
responses:
'200':
description: Translation successful
content:
application/json:
schema:
$ref: '#/components/schemas/TranslationResponse'
'400':
description: Bad request — invalid parameters
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized — invalid or missing credentials
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
security:
- clientId: []
- clientSecret: []
requestBody:
content:
application/x-www-form-urlencoded:
schema:
type: object
properties:
source:
type: string
default: ko
description: 'Source language code: ko (Korean), en (English), ja (Japanese), zh-CN (Chinese Simplified), zh-TW (Chinese Traditional)'
target:
type: string
default: en
description: Target language code. Same possible values as source.
text:
type: string
default: 나는 한국인입니다.
description: Text to translate. UTF-8 encoding only.
required:
- source
- target
- text
/v1/krdict/romanization:
get:
tags:
- Papago
summary: Korean Name Romanization
description: Converts a Korean name written in Hangul to its romanized Latin-script equivalent. Returns both the official romanization (following current Korean romanization rules) and statistically common romanizations.
operationId: papago.romanization
parameters:
- name: query
in: query
description: Korean name in Hangul (UTF-8) to be romanized
required: true
schema:
type: string
responses:
'200':
description: Romanization successful
content:
application/json:
schema:
$ref: '#/components/schemas/RomanizationResponse'
'400':
description: Bad request — invalid parameters
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized — invalid or missing credentials
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
security:
- clientId: []
- clientSecret: []
components:
schemas:
RomanizationResponse:
type: object
description: Romanization result for a Korean name
properties:
aResult:
type: array
items:
$ref: '#/components/schemas/RomanizationResult'
TranslationResponse:
type: object
description: Successful translation result
properties:
message:
type: object
properties:
'@type':
type: string
example: response
'@service':
type: string
example: naverservice.nmt.proxy
'@version':
type: string
example: 1.0.0
result:
$ref: '#/components/schemas/TranslationResult'
TranslationResult:
type: object
description: Core translation data
properties:
srcLangType:
type: string
description: Detected or specified source language code
example: ko
tarLangType:
type: string
description: Target language code
example: en
translatedText:
type: string
description: The translated text output
example: I am Korean.
engineType:
type: string
description: Translation engine used (NMT or SMT)
example: NMT
pivot:
type: string
description: Pivot language used if translation went through an intermediate language
example: ''
dict:
type: object
description: Dictionary information (if applicable)
tarDict:
type: object
description: Target dictionary information (if applicable)
RomanizationItem:
type: object
properties:
name:
type: string
description: Romanized full name candidate
example: Gildong Hong
score:
type: number
description: Statistical usage score for this romanization
example: 99.9
ErrorResponse:
type: object
description: API error response
properties:
errorCode:
type: string
description: Naver API error code
example: SE01
errorMessage:
type: string
description: Human-readable error description
example: Unsupported source language
RomanizationResult:
type: object
properties:
sFirstName:
type: string
description: Romanized first (family) name
example: Kim
aItems:
type: array
description: Array of romanization candidates with usage statistics
items:
$ref: '#/components/schemas/RomanizationItem'
securitySchemes:
clientId:
type: apiKey
name: X-Naver-Client-Id
in: header
description: Client ID issued when registering an application on the Naver Developer Center.
clientSecret:
type: apiKey
name: X-Naver-Client-Secret
in: header
description: Client secret issued when registering an application on the Naver Developer Center.
externalDocs:
description: Naver Papago Developer Guide
url: https://api.ncloud-docs.com/docs/en/ai-naver-papagonmt