How to Translate Text with Bitcoin Lightning
Translate text across 119 languages with ultra-fast inference and per-character pricing. Automatic source detection, no account, no data logging, no subscription.
For Humans
Use cases for individuals, businesses, and travelers
Translate sensitive documents privately
Legal contracts, medical records, financial documents — translate them without creating an account that ties you to the content. No account means no one knows what you translated, and nothing is stored or used for training.
Communicate across language barriers
Quick translations for travel, business emails, or customer messages in any of 119 languages — from major world languages to regional ones like Basque, Welsh, or Swahili. Pay a few sats instead of subscribing to a translation service.
Translate content for your audience
Blog posts, product descriptions, marketing copy — translate into multiple languages without a monthly subscription. Pay only for the characters you actually translate, and scale up or down as needed.
Language learning helper
Translate passages to compare against your own translations, or translate text into your target language for study material. With 119 languages including less common ones, you can practice with real content in nearly any language you're learning.
Simple Per-Character Pricing
One model. One price. Ultra-fast.
All translations run on our fastest multilingual model with LPU-accelerated inference. No tiers to choose from — just paste your text and go.
5,000 words ≈ 30-50 sats
119 Supported Languages
Including Latin, Cyrillic, CJK, Arabic, Indic, and many more scripts:
How It Works
For Agents
Use cases for AI agents, automation pipelines, and developers
No API key needed. Translation uses L402 — pay-per-request via Lightning. Agents send text and a target language, receive a 402 with an invoice, pay it, and get the translation back. Scale from one request to millions with no quota management.
Multilingual customer support
Auto-translate incoming customer messages to English, process them with your support agent, then translate the response back to the customer's language. Handle support tickets in 119 languages without a multilingual team.
Content localization pipelines
Translate product listings, documentation, or UI strings into multiple languages automatically. Run a batch job that localizes your entire catalog — paying per character instead of per seat on a localization platform.
Cross-language research
Translate foreign-language documents, academic papers, or news articles for analysis. Build agents that monitor and summarize information sources across languages without being limited to English-only content.
Privacy-first translation
Translate confidential legal or medical documents without sending data to services that log and train on your content. L402 authentication means no account, no API key, and no persistent link between your identity and what you translate.
L402 Authentication Flow
# Translate text via L402
# Step 1: Send request (returns 402 + invoice)
curl -X POST https://sats4ai.com/api/l402/translate-text \
-H "Content-Type: application/json" \
-d '{"text":"Hello, how are you?","target_language":"Spanish"}'
# Step 2: Pay the Lightning invoice (amount varies by length)
# Step 3: Resend with payment proof
curl -X POST https://sats4ai.com/api/l402/translate-text \
-H "Content-Type: application/json" \
-H "Authorization: L402 <token>:<preimage>" \
-d '{"text":"Hello, how are you?","target_language":"Spanish"}'MCP & OpenClaw
Chain with Other Services
Extract text from a foreign-language document or image, then translate it into your language. Useful for scanned contracts, receipts, or signage photos.
Translate text into another language, then convert it to audio. Hear the pronunciation or create audio content for a foreign audience.
Get an AI-generated response in English, then translate it to the target language. Useful when AI models perform better in English but you need output in another language.
Translate a message into the recipient's language, then send it via email or SMS. Communicate with international contacts without knowing their language.
Translate Text in 119 Languages — No Signup Required
Pure per-character pricing from 1 sat. Ultra-fast inference. Your text is never stored or logged. All you need is a Lightning wallet.