Your Agent's Favorite Tools
Phone calls, SMS, fax, translation, voice, images, video — 40+ tools your AI can actually use. No account. Paid in Bitcoin.
$ curl -X POST https://sats4ai.com/api/l402/translate-text \
-d '{"text":"Hello world","targetLanguage":"es"}'
# 402 Payment Required + Lightning invoice (1 sat)
# pay it, retry with the L402 auth header
$ # → {"translatedText":"Hola mundo"}Authorized by payment, not by account. Nothing to revoke, leak, or rug.
Pick a tool. There is no account to create.
Scan the Lightning QR — or your agent pays the L402 invoice.
Get the result. We store nothing.
What sets us apart
Services you can't get anywhere else without an account, a credit card, and a subscription.
Make Phone Calls
Call countries your plan doesn't cover, skip roaming fees abroad, or call back a suspected spammer — from a number that isn't yours.
SMS Messaging
Send a text from your browser — no SIM, no signup, and your real number stays private.
Translation — 452 Languages
Translate a lease or a contract — 452 languages, including 251 no frontier model serves. Quality tier shown before you pay.
Text-to-Speech — 602+ Languages
A voice ad in Yoruba or a one-off voiceover — 602 languages, pay per use, nothing on file.
AI Voice Calls
Send an AI agent to make the call — book a table, chase a refund, navigate the phone menu — and read the transcript after.
Send Email
Send an anonymous tip, a one-off notice, or an email you don't want tied to your inbox — 200 sats, no account.
EPUB to Audiobook
Turn an EPUB or PDF into a chaptered audiobook — in any of 602 languages, even narrated in your own cloned voice.
Send a Fax
Your bank, a court, or a landlord still wants a fax — send it from your browser, catch the reply for 24 hours.
Live Translated Calls
Call a doctor, landlord, or family abroad — you speak your language, they hear theirs, live.
All Tools
40+ AI tools — pay per use with Lightning.
Image Generation
Product shots for your WhatsApp shop, art for a client deck, or images no AI company can tie to you — pay per image.
Image Edit
Remove a background, erase a photobomber, or restore and colorize an old photo — the latest editing models, no account.
Background Removal
Product photo on white in one click — background gone, transparent PNG back. 5 sats.
Image Upscale
Enlarge a small photo 2x or 4x without the blur — 5 sats.
Face Restoration
Fix the blurry face in an old or AI-generated photo — 5 sats.
Colorize Photos
Bring old black-and-white family photos to life — 5 sats.
Object Detection
Find and box every object in an image — names, positions, confidence. 5 sats.
Object Removal
Erase the photobomber or the watermark — describe it, it's gone. 15 sats.
NSFW Detection
Check an image is safe before you publish it — 2 sats.
Video from Text
One ad clip for your shop, one scene for a pitch — generated from text, paid once, no subscription.
Video from Image
Make your product photo move, or bring an old family photo to life — one still becomes a short clip.
Text Generation
Hit your AI chat limit mid-deadline, or want a chat that isn't tied to your name? Pay per message, no account.
Music Generation
A full song with vocals for your video, or a custom birthday song — up to six minutes, 300 sats.
Voice Cloning
Clone your voice from one short recording — then narrate audiobooks or videos in it, even in other languages.
Audio Transcription
Turn a meeting, interview, or voice note into text with speaker labels and timestamps — pay per minute, no account.
Video Subtitles
Subtitle a video of any length without uploading it — the video never leaves your device.
Vision / Image Analysis
Screenshot a chart, an error, or a sign in another language — ask questions, get plain answers.
Document Extraction (OCR)
A scanned contract, handwriting, or tables — back as clean text ready for any AI, 10 sats a page.
Receipt OCR
Snap a crumpled receipt — get merchant, items, totals, and tax as clean data for your books.
Private Document Analysis
Ask AI about a contract, an NDA, or a medical file — processed in memory, never stored, no login.
3D Model Generation
Turn a product photo or sketch into a 3D model — for your game, your shop page, or your printer.
File Conversion
PDF to DOCX, MP4 to MP3, 200+ formats — convert one file without signing up for an ad-farm site.
PDF Tools
Turn a locked PDF back into Word, Markdown, or plain text — or merge scans into one file for the visa office.
HTML to PDF
Turn a Markdown invoice or an HTML page into a clean PDF — 50 sats, no account.
L402 API
Access all 40+ tools programmatically. HTTP 402 + Lightning invoice = the payment is the credential.
For AI Agents & Developers
Drop one config line into your MCP client. Your agent gets AI phone calls, audiobooks in 602 languages, translation, fax, transcription — callable via MCP or L402. A Lightning invoice is the only credential. No API key, no Stripe, no approval process.
{
"mcpServers": {
"sats4ai": {
"url": "https://sats4ai.com/api/mcp"
}
}
}For Humans
Pick a tool. Scan a Lightning QR. AI handles the work — your phone call in any language, your text read aloud, your document translated, your fax sent. Results back in seconds.
- AI phone calls (any language)varies
- Translate (452 languages)1 sat/1000 chars
- Audiobooks (602 languages)10-100 chars/sat
- Fax worldwidefrom 500 sats
See all tools above
Why there is no account
An API key ties every call to your name, card, and billing record. Your payment is the only key here — nothing to log, revoke, or rug. The six-layer argument, who builds this, and how we make money — all on one page.
Vote on What We Build Next
See every live service and vote with 1 sat on what gets built next. Your Lightning payment is your ballot.
Featured In
Not sure where to start? Read real use cases and step-by-step guides.
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