Text Language API

POST

Identify the language behind any incoming text snippet.

Text Language detects the language of any input string, returning the full language name and its two-letter ISO 639-1 code. Send plain text passages or short snippets to identify incoming multilingual content.

Try it — live request, no key required

Request

POSTapi.apiverve.com/v1/textlanguage

Body

textstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "language": "french",
    "iso": "fr"
  }
}

About the Text Language API

Text Language works by analyzing the text and comparing it to a database of languages and ai models. It uses advanced algorithms to detect the language of the text and returns the language.

What people use it for

Localized Helpdesk Queuing: Helpdesk software inspects inbound contact messages to route each ticket to an agent fluent in the detected language.
User Review Indexing: When customers submit feedback across regional app stores, marketplaces tag each comment with its ISO code for localized sentiment tracking.
Forum Post Moderation: Community platforms check new discussion submissions to assign posts to regional moderators based on the returned language name.
Speech Engine Selection: Before generating synthetic audio, narration tools check input snippets to select the voice model matching the detected ISO code.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use Text Language

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets

Questions.

Common questions about the Text Language API.

Read the docs →

Which plan fits 50,000 language checks a month?

Starter easily covers 50,000 language checks a month. At 2 credits per call, that volume uses 100,000 credits, which is half of the Starter allowance. It works out to about $0.30 per 1,000 calls. For evaluation, the Free plan includes 100 checks each month.

What identifiers does the response provide for a detected language?

Every successful check returns both the full English language name, such as French, and its standard ISO 639-1 code. This lets you present human-readable labels to users while using standardized two-letter codes in your database or routing logic.

What parameters are required to check a snippet?

You only need to submit a single required string in the text parameter. The service evaluates the content of that string and returns the identified language without requiring any optional configuration.

Can I submit short phrases as well as longer passages?

Yes. The endpoint accepts any plain text string, whether you send a brief user comment or a multi-sentence document. It analyzes the characters and words provided to detect the language.

Can the returned language code be used to triage incoming support tickets?

Yes. Multilingual support and ticket triage are standard use cases for Text Language. You can inspect the returned ISO 639-1 code to automatically route incoming customer messages to the appropriate localized queue or team.

Request parameters — POST /v1/textlanguage

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`text`Required	string	`Bonjour, comment allez-vous aujourd'hui?`	The text to detect the language of

Example request

curl -X POST "https://api.apiverve.com/v1/textlanguage" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Ceci est un exemple de texte. Il peut détecter la langue"}'

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.
`content-type`Required	POST body	`application/json`

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — POST /v1/textlanguage

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "language": "french",
    "iso": "fr"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`language`	string	`"french"`	Full name of detected language (e.g., French)
`iso`	string	`"fr"`	ISO 639-1 code for detected language

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	Text Language calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — POST /v1/textlanguage

No SDK to install — this is a plain HTTPS call to /v1/textlanguage with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/textlanguage" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/textlanguage-apiSource, issues and the examples this page is built from.ReferenceText Language API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/textlanguagenpm apiverve-textlanguagePyPI APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — POST /v1/textlanguage

Install the Node.js SDK, then call the Text Language API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/textlanguage

Node.js

const res = await fetch("https://api.apiverve.com/v1/textlanguage", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/textlanguageThe published Node.js client, versioned and signed.GitHubapiverve/textlanguage-apiSource, issues and the examples this page is built from.ReferenceText Language API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

apiverve-textlanguagePyPI APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — POST /v1/textlanguage

Install the Python SDK, then call the Text Language API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-textlanguage

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/textlanguage",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

PyPIapiverve-textlanguageThe published Python client, versioned and signed.GitHubapiverve/textlanguage-apiSource, issues and the examples this page is built from.ReferenceText Language API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/textlanguagenpm APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — POST /v1/textlanguage

Install the C# / .NET SDK, then call the Text Language API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.TextLanguage

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/textlanguage");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.TextLanguageThe published C# / .NET client, versioned and signed.GitHubapiverve/textlanguage-apiSource, issues and the examples this page is built from.ReferenceText Language API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/textlanguagenpm apiverve-textlanguagePyPI

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — POST /v1/textlanguage

No SDK to install — this is a plain HTTPS call to /v1/textlanguage with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/textlanguage", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/textlanguagenpm apiverve-textlanguagePyPI APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — POST /v1/textlanguage

No SDK to install — this is a plain HTTPS call to /v1/textlanguage with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/textlanguage");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/textlanguagenpm apiverve-textlanguagePyPI APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — POST /v1/textlanguage

No SDK to install — this is a plain HTTPS call to /v1/textlanguage with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/textlanguage")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/textlanguagenpm apiverve-textlanguagePyPI APIVerve.API.TextLanguageNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Text Processing

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Text Language API

Try it — live request, no key required

About the Text Language API

What people use it for

Ways to call it

Other ways to use Text Language

Questions.

Request parameters — POST /v1/textlanguage

Required

Authentication

Response — POST /v1/textlanguage

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — POST /v1/textlanguage

Resources

Also published for

Call it from Node.js — POST /v1/textlanguage

Resources

Also published for

Call it from Python — POST /v1/textlanguage

Resources

Also published for

Call it from C# / .NET — POST /v1/textlanguage

Resources

Also published for

Call it from Go — POST /v1/textlanguage

Resources

Also published for

Call it from PHP — POST /v1/textlanguage

Resources

Also published for

Call it from Ruby — POST /v1/textlanguage

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Text Language API

Text Processing

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