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Languagelayer

Languagelayer is a language detection REST API that identifies which of 173 world languages, accents, and dialects a piece of text is written in, returning the result as lightweight JSON. It is used to route support tickets and user-generated content, pick the right translation pipeline, localise interfaces and email campaigns, and tag or filter multilingual datasets. Detection works probabilistically rather than by dictionary lookup: the query text is first checked against known tri-grams for e

For agents: REST API detecting which of 173 languages, accents and dialects text is written in, returning JSON; free tier with 100 monthly requests and paid plans.

language-detectionrest-apilanguage-identificationmultilingualjson-api

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-24T01:02:43.684Z. Cached copy · Source on languagelayer.com

# Languagelayer

> Languagelayer is a language detection REST API that identifies which of 173 world languages, accents, and dialects a piece of text is written in, returning the result as lightweight JSON. It is used to route support tickets and user-generated content, pick the right translation pipeline, localise interfaces and email campaigns, and tag or filter multilingual datasets. Detection works probabilistically rather than by dictionary lookup: the query text is first checked against known tri-grams for each candidate language, then each word and word sequence is cross-referenced against confidence words and language-specific sequences, and finally broken down and scored against a continuously improving probability matrix describing how characters follow one another in each language and language family. The highest-scoring language wins, and accuracy improves with longer input. Every match returns a language code and name, a raw probability value, a confidence percentage, and a reliable_result boolean indicating whether the API is fully confident in the answer. Responses support JSON formatting, JSONP callbacks, and Access-Control (CORS) headers, served over 256-bit HTTPS, with an uptime of around 99.9%. Languagelayer is part of the APILayer suite (one account, one API key, one dashboard across the APILayer product family).
A free API key is available at https://languagelayer.com/signup/free/monthly — the Free Plan is a no-time-limit trial with 100 monthly API requests covering standard detection queries and 256-bit HTTPS, restricted to non-commercial use and without support; paid plans add commercial-use rights, standard support, and batch detection. Paid tiers are Basic ($4.99/month, 50,000 requests, adds batch detection), Professional ($19.99/month, 500,000 requests), and Enterprise ($39.99/month, 2,000,000 requests), with up to 15% off on annual billing. To call the API, append your access_key as a query parameter; both GET and POST are supported, and POST is recommended for long query texts. The base URL is apilayer.net/api. A single detection is one HTTP request: apilayer.net/api/detect?access_key=YOUR_KEY&query=Hello+World. There are two endpoints: Detect (/detect), which takes a single URL-encoded query parameter, and Batch (/batch), which takes repeated query[] parameters to identify several texts in one call and is available from the Basic plan upward. Billing note: a standard detect request increments usage by 1, while a batch request increments usage by the number of query[] parameters it carries, so a 20-text batch costs 20 API requests. Usage notifications are sent at 75%, 90%, and 100% of the monthly allowance, after which overage fees apply. Code examples are provided for PHP, JavaScript, Python, Ruby, Java, and more.
## Getting Started
- [Languagelayer Homepage](https://languagelayer.com/): Free, powerful language detection API for 173 languages
- [API Documentation](https://docs.apilayer.com/languagelayer/docs/api-docum
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Machine-readable: GET /v1/resolve?q=languagelayer.com · GET /v1/domain/languagelayer.com · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for languagelayer.com:
1. POST https://agentwebmap.com/v1/sites/languagelayer.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://languagelayer.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/languagelayer.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/languagelayer.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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