Introduction

Welcome to the i18n-agent Translation API! AI-powered translation service with cultural adaptation

This API documentation provides comprehensive information about all available endpoints, authentication methods, request/response formats, and error codes.

Base URLs

Environment	URL
Development	`http://localhost:8000`
Production	`https://api.i18nagent.ai`

Key Features

🌐 Multi-language Support - Translate content to 10+ languages with cultural adaptation
🚀 Real-time Streaming - Server-Sent Events for progress updates
📁 File Translation - Support for JSON, YAML, XML, CSV, and more
🔐 Secure Authentication - API key-based authentication
💳 Credit System - Pay-as-you-go pricing model
🤖 AI-Powered - Uses advanced LLMs for accurate translations

Authentication

# With shell, you can just pass the correct header with each request
curl "api_endpoint_here" \
  -H "Authorization: Bearer i18n_your_api_key_here"

const headers = {
  'Authorization': 'Bearer i18n_your_api_key_here',
  'Content-Type': 'application/json'
};

fetch('api_endpoint_here', { headers })
  .then(response => response.json())
  .then(data => console.log(data));

import requests

headers = {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('api_endpoint_here', headers=headers)
print(response.json())

package main

import (
    "net/http"
)

func main() {
    client := &http.Client{}
    req, _ := http.NewRequest("GET", "api_endpoint_here", nil)
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

The i18n-agent API uses API keys to allow access to the API. You can get your API key from your account dashboard.

The API key must be included in all API requests to the server in a header that looks like the following:

Authorization: Bearer i18n_your_api_key_here

You must replace i18n_your_api_key_here with your personal API key.

Endpoints

Service Info

Get service information

GET /

Returns service metadata and available endpoints

curl -X GET "https://api.i18nagent.ai/" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.356Z"
  }
}

Monitoring

Health check

GET /health

Check service health status

curl -X GET "https://api.i18nagent.ai/health" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/health', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/health',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/health", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Credits

Get team credits

GET /credits

Get current credit balance for the authenticated team

curl -X GET "https://api.i18nagent.ai/credits" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/credits', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/credits',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/credits", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Languages

List supported languages

GET /languages

Get a list of all supported languages with quality ratings

curl -X GET "https://api.i18nagent.ai/languages" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/languages', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/languages',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/languages", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Translation

Create translation (unified)

POST /translations

Unified endpoint for translating both text and file content

curl -X POST "https://api.i18nagent.ai/translations" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "texts": [
    "Hello, world!",
    "Welcome to our service"
  ],
  "targetLanguage": "es",
  "targetAudience": "general",
  "industry": "technology",
  "sourceLanguage": "en",
  "region": "Mexico",
  "notes": "Keep technical terms in English, use formal tone"
}'

const response = await fetch('https://api.i18nagent.ai/translations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    })
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.post(
    'https://api.i18nagent.ai/translations',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    data := map[string]interface{}{
        "texts": []string{"Hello, world!", "Welcome to our service"},
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
    }
    jsonData, _ := json.Marshal(data)
    
    req, _ := http.NewRequest("POST", "https://api.i18nagent.ai/translations", bytes.NewBuffer(jsonData))
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Request Body Parameters

Parameter	Type	Required	Description

Create translation with streaming progress

POST /translations/stream

Create translation with Server-Sent Events (SSE) for real-time progress updates

curl -X POST "https://api.i18nagent.ai/translations/stream" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "texts": [
    "Hello, world!",
    "Welcome to our service"
  ],
  "targetLanguage": "es",
  "targetAudience": "general",
  "industry": "technology",
  "sourceLanguage": "en",
  "region": "Mexico",
  "notes": "Keep technical terms in English, use formal tone"
}'

const response = await fetch('https://api.i18nagent.ai/translations/stream', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    })
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.post(
    'https://api.i18nagent.ai/translations/stream',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    data := map[string]interface{}{
        "texts": []string{"Hello, world!", "Welcome to our service"},
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
    }
    jsonData, _ := json.Marshal(data)
    
    req, _ := http.NewRequest("POST", "https://api.i18nagent.ai/translations/stream", bytes.NewBuffer(jsonData))
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Request Body Parameters

Parameter	Type	Required	Description
texts	array	Yes	Array of texts to translate
targetLanguage	string	Yes	Target language code (e.g., 'es', 'fr', 'ja')
targetAudience	string	No	Target audience (e.g., 'general', 'technical', 'casual', 'formal') (default: general)
industry	string	No	Industry context (e.g., 'technology', 'healthcare', 'finance') (default: technology)
sourceLanguage	string	No	Source language code (auto-detected if not provided)
region	string	No	Specific region for localization (e.g., 'Spain', 'Mexico', 'Brazil')
context	string	No	Optional additional context or instructions for the translation (e.g., 'Keep technical terms in English', 'Use formal tone', 'Preserve brand names')

Get translation cost estimate

POST /translations/estimate

Calculate word count and credits required for translation

curl -X POST "https://api.i18nagent.ai/translations/estimate" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "texts": [
    "Hello, world!",
    "Welcome to our service"
  ],
  "targetLanguage": "es",
  "targetAudience": "general",
  "industry": "technology",
  "sourceLanguage": "en",
  "region": "Mexico",
  "notes": "Keep technical terms in English, use formal tone"
}'

const response = await fetch('https://api.i18nagent.ai/translations/estimate', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    })
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.post(
    'https://api.i18nagent.ai/translations/estimate',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    data := map[string]interface{}{
        "texts": []string{"Hello, world!", "Welcome to our service"},
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
    }
    jsonData, _ := json.Marshal(data)
    
    req, _ := http.NewRequest("POST", "https://api.i18nagent.ai/translations/estimate", bytes.NewBuffer(jsonData))
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Request Body Parameters

Parameter	Type	Required	Description
content	string	Yes	Content to analyze
fileType	string	No	File type for content analysis (default: txt)

Analysis

Analyze content for translation readiness

POST /analyze

Analyze content to identify potential issues and get improvement suggestions before translation. This endpoint consumes credits at the same rate as translation (0.001 credits per word).

curl -X POST "https://api.i18nagent.ai/analyze" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "texts": [
    "Hello, world!",
    "Welcome to our service"
  ],
  "targetLanguage": "es",
  "targetAudience": "general",
  "industry": "technology",
  "sourceLanguage": "en",
  "region": "Mexico",
  "notes": "Keep technical terms in English, use formal tone"
}'

const response = await fetch('https://api.i18nagent.ai/analyze', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    })
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.post(
    'https://api.i18nagent.ai/analyze',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    data := map[string]interface{}{
        "texts": []string{"Hello, world!", "Welcome to our service"},
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
    }
    jsonData, _ := json.Marshal(data)
    
    req, _ := http.NewRequest("POST", "https://api.i18nagent.ai/analyze", bytes.NewBuffer(jsonData))
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Request Body Parameters

Parameter	Type	Required	Description
targetLanguage	string	Yes	Target language code for translation
targetAudience	string	No	Target audience (default: general)
industry	string	No	Industry context (default: general)
sourceLanguage	string	No	Source language code (auto-detected if not provided)
region	string	No	Specific region for localization
content	object	Yes	Content to analyze (text, array of texts, or structured object)
fileType	string	No	Optional file type if content is from a file

Translation Jobs

Get translation details

GET /translations/{id}

Get details of a specific translation by ID

curl -X GET "https://api.i18nagent.ai/translations/{id}" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/translations/{id}', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/translations/{id}',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/translations/{id}", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Query Parameters

Parameter	Required	Description
id	Yes	Translation ID

Get translation status

GET /translations/{id}/status

Get the current status of a translation job

curl -X GET "https://api.i18nagent.ai/translations/{id}/status" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/translations/{id}/status', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/translations/{id}/status',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/translations/{id}/status", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Query Parameters

Parameter	Required	Description
id	Yes	Translation ID

Download translation result

GET /translations/{id}/result

Download the translated content

curl -X GET "https://api.i18nagent.ai/translations/{id}/result" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/translations/{id}/result', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/translations/{id}/result',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/translations/{id}/result", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Query Parameters

Parameter	Required	Description
id	Yes	Translation ID
language	No	Language code for specific language result

Download original file

GET /translations/{id}/original

Download the original uploaded file

curl -X GET "https://api.i18nagent.ai/translations/{id}/original" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/translations/{id}/original', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/translations/{id}/original',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/translations/{id}/original", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Query Parameters

Parameter	Required	Description
id	Yes	Translation ID

Resume translation from checkpoint

POST /translations/{id}/resume

Resume a failed or interrupted translation from a specific checkpoint or automatically from the last successful checkpoint

curl -X POST "https://api.i18nagent.ai/translations/{id}/resume" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "texts": [
    "Hello, world!",
    "Welcome to our service"
  ],
  "targetLanguage": "es",
  "targetAudience": "general",
  "industry": "technology",
  "sourceLanguage": "en",
  "region": "Mexico",
  "notes": "Keep technical terms in English, use formal tone"
}'

const response = await fetch('https://api.i18nagent.ai/translations/{id}/resume', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    })
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.post(
    'https://api.i18nagent.ai/translations/{id}/resume',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        "texts": [
            "Hello, world!",
            "Welcome to our service"
        ],
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
        "sourceLanguage": "en",
        "region": "Mexico",
        "notes": "Keep technical terms in English, use formal tone"
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    data := map[string]interface{}{
        "texts": []string{"Hello, world!", "Welcome to our service"},
        "targetLanguage": "es",
        "targetAudience": "general",
        "industry": "technology",
    }
    jsonData, _ := json.Marshal(data)
    
    req, _ := http.NewRequest("POST", "https://api.i18nagent.ai/translations/{id}/resume", bytes.NewBuffer(jsonData))
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Query Parameters

Parameter	Required	Description
id	Yes	Translation ID

Request Body Parameters

Parameter	Type	Required	Description
checkpointId	string	No	Opaque checkpoint ID to resume from (obtained from status endpoint). If not provided and autoDetect is true, will resume from last successful checkpoint.
continueToEnd	boolean	No	Whether to continue processing all remaining content after resuming (default: true)
autoDetect	boolean	No	Automatically detect and resume from the last successful checkpoint if checkpointId is not provided (default: true)

Get active translation jobs

GET /translations/jobs/active

Get list of currently active translation jobs

curl -X GET "https://api.i18nagent.ai/translations/jobs/active" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch('https://api.i18nagent.ai/translations/jobs/active', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer i18n_your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests
import json

response = requests.get(
    'https://api.i18nagent.ai/translations/jobs/active',
    headers={
        'Authorization': 'Bearer i18n_your_api_key_here',
        'Content-Type': 'application/json'
    }
)

print(response.json())

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
)

func main() {
    client := &http.Client{}
    
    req, _ := http.NewRequest("GET", "https://api.i18nagent.ai/translations/jobs/active", )
    req.Header.Add("Authorization", "Bearer i18n_your_api_key_here")
    req.Header.Add("Content-Type", "application/json")
    
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

{
  "translations": [
    {
      "original": "Hello, world!",
      "translated": "¡Hola, mundo!",
      "confidence": 0.98
    }
  ],
  "metadata": {
    "sourceLanguage": "en",
    "targetLanguage": "es",
    "wordCount": 2,
    "creditsUsed": 0.002,
    "timestamp": "2025-09-19T08:57:08.357Z"
  }
}

Errors

The i18n-agent API uses the following error codes:

Error Code	Meaning
400	Bad Request -- Your request is invalid.
401	Unauthorized -- Your API key is invalid.
402	Payment Required -- Insufficient credits in your account.
403	Forbidden -- Your API key is inactive or team not found.
404	Not Found -- The specified resource could not be found.
500	Internal Server Error -- We had a problem with our server. Try again later.
503	Service Unavailable -- We're temporarily offline for maintenance. Please try again later.

Error Response Format

{
  "error": "Detailed error message describing what went wrong",
  "success": false
}

Choose Endpoint:

Select an endpoint above to start testing

Authentication

# Add your API key to requests
curl -X GET "https://api.i18nagent.ai/" \
  -H "Authorization: Bearer i18n_your_api_key_here"

Translate Text

curl -X POST "https://api.i18nagent.ai/translate" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "texts": ["Hello, world!", "Welcome to our service"],
    "targetLanguage": "es",
    "targetAudience": "general",
    "industry": "technology"
  }'

Translate File

curl -X POST "https://api.i18nagent.ai/translate_file" \
  -H "Authorization: Bearer i18n_your_api_key_here" \
  -F "[email protected]" \
  -F "targetLanguage=es" \
  -F "targetAudience=general"

Authentication

const API_KEY = 'i18n_your_api_key_here';
const BASE_URL = 'https://api.i18nagent.ai';

const headers = {
  'Authorization': `Bearer ${API_KEY}`,
  'Content-Type': 'application/json'
};

Translate Text

const response = await fetch(`${BASE_URL}/translate`, {
  method: 'POST',
  headers,
  body: JSON.stringify({
    texts: ['Hello, world!', 'Welcome to our service'],
    targetLanguage: 'es',
    targetAudience: 'general',
    industry: 'technology'
  })
});

const result = await response.json();
console.log(result.translatedTexts);

Translate File

const formData = new FormData();
formData.append('file', fileInput.files[0]);
formData.append('targetLanguage', 'es');
formData.append('targetAudience', 'general');

const response = await fetch(`${BASE_URL}/translate_file`, {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${API_KEY}`
  },
  body: formData
});

const result = await response.json();

Authentication

import requests

API_KEY = 'i18n_your_api_key_here'
BASE_URL = 'https://api.i18nagent.ai'

headers = {
    'Authorization': f'Bearer {API_KEY}',
    'Content-Type': 'application/json'
}

Translate Text

response = requests.post(f'{BASE_URL}/translate', 
    headers=headers,
    json={
        'texts': ['Hello, world!', 'Welcome to our service'],
        'targetLanguage': 'es',
        'targetAudience': 'general',
        'industry': 'technology'
    }
)

result = response.json()
print(result['translatedTexts'])

Translate File

files = {'file': open('document.json', 'rb')}
data = {
    'targetLanguage': 'es',
    'targetAudience': 'general'
}

response = requests.post(f'{BASE_URL}/translate_file',
    headers={'Authorization': f'Bearer {API_KEY}'},
    files=files,
    data=data
)

result = response.json()