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Your AI tools require an account.
Ours require an invoice.

40+ AI tools — phone calls, SMS, translation in 119 languages, text-to-speech, image and video generation, document extraction. No account. No API key. No credit card. Pay per call with Lightning.

From 2 satsNo signupPay per useStateless — no data stored
Use the toolsConnect via MCP

For AI Agents & Developers

One config line gives your agent 40+ tools. No API key, no billing setup, no approval process. Agents pay per call via L402 — the Lightning payment is the only credential.

{
  "mcpServers": {
    "sats4ai": {
      "url": "https://sats4ai.com/api/mcp"
    }
  }
}
MCP docs →L402 API →

For Humans

Browse tools, type a prompt, scan a Lightning QR code. Results in seconds. No subscription — pay only for what you use.

  • Make phone calls / SMSvaries
  • Translate (119 languages)1 sat/1000 chars
  • Text-to-speech (45+ languages)from 300 sats
  • Generate imagesfrom 100 sats

+ 35 more tools below

Don't trust. Verify.

No accounts. Ever.

No login endpoint, no OAuth tokens, no sessions, no cookies. There is nothing to hack, revoke, or surveil. Every request is self-contained — like paying cash.

Payment is authentication.

HTTP status 402 — Payment Required. Your agent hits the endpoint, gets a Lightning invoice, pays it, gets the result. No API key to leak. No terms of service that change overnight.

Stateless architecture.

We don't store conversations, prompts, results, or usage patterns. Not because of a privacy policy — because the system is built with no state between requests.

What sets us apart

Services you can't get anywhere else without an account, a credit card, and a subscription.

Make Phone Calls

Place calls to any phone number worldwide with sats. Deliver a spoken message or let an AI agent handle a two-way conversation — book a table, navigate an IVR, negotiate a bill. No account, no Twilio signup.

Lightning payments • No signup required • Instant access

SMS Messaging

Send SMS to any phone number in any country. Pay per message with Lightning — no carrier account, no API key, no monthly plan.

Lightning payments • No signup required • Instant access

Translation — 119 Languages

Translate text across 119 languages including low-resource languages like Yoruba, Marathi, Tagalog, and Swahili. 1 sat per 1000 characters. Privacy-preserving — no text stored.

Lightning payments • No signup required • Instant access

Text-to-Speech — 45+ Languages

Convert text to realistic speech with 467 voices across 45+ languages. Three quality tiers, emotion control, adjustable speed. Voice cloning available.

Lightning payments • No signup required • Instant access

AI Voice Calls

An AI agent calls a phone number on your behalf and has a two-way conversation. Booking, negotiation, IVR navigation. Returns a full transcript and structured analysis.

Lightning payments • No signup required • Instant access

Send Email

Send a one-off email to anyone. No SMTP server, no domain verification, no account. 200 sats.

Lightning payments • No signup required • Instant access

EPUB to Audiobook

Upload any EPUB and get a full AI-narrated audiobook with chapters (M4B). Optional translation to 40+ languages. Pay per character.

Lightning payments • No signup required • Instant access

All Tools

40+ AI tools — pay per use with Lightning.

Image Generation

Generate images from text prompts. Multiple AI models available. Pay per image with sats.

Lightning payments • No signup required • Instant access

Image Edit

Edit images with natural language. Add objects, remove elements, change styles, inpaint regions.

Lightning payments • No signup required • Instant access

Background Removal

Remove image backgrounds instantly. Returns transparent PNG. 5 sats.

Lightning payments • No signup required • Instant access

Image Upscale

2x or 4x neural super-resolution. Enhance low-res images with AI. 5 sats.

Lightning payments • No signup required • Instant access

Face Restoration

Restore blurry, damaged, or AI-generated faces to photorealistic quality. 5 sats.

Lightning payments • No signup required • Instant access

Colorize Photos

Colorize black-and-white photos with AI. 5 sats.

Lightning payments • No signup required • Instant access

Object Detection

Detect and locate objects in images with bounding boxes. Open-set — describe any object. 5 sats.

Lightning payments • No signup required • Instant access

Object Removal

Remove objects from images by description. No mask needed — just say what to erase. 15 sats.

Lightning payments • No signup required • Instant access

NSFW Detection

Classify image safety. Returns confidence scores for content categories. 2 sats.

Lightning payments • No signup required • Instant access

Video from Text

Generate cinematic video clips from text prompts. Physics-aware, with optional audio. Pay per second.

Lightning payments • No signup required • Instant access

Video from Image

Animate any still image into a video clip. Describe the motion, pay with sats.

Lightning payments • No signup required • Instant access

Text Generation

Chat with AI or generate content. Multiple model tiers — budget, standard, best. Pay per message.

Lightning payments • No signup required • Instant access

Music Generation

Create original songs with AI-composed music and vocals. Radio-quality MP3.

Lightning payments • No signup required • Instant access

Voice Cloning

Clone any voice from a short audio sample. Get a reusable voice ID for text-to-speech.

Lightning payments • No signup required • Instant access

Audio Transcription

Transcribe audio to text with timestamps and speaker diarization. 13 languages, up to 3 hours.

Lightning payments • No signup required • Instant access

Vision / Image Analysis

Upload images and get AI analysis — captions, OCR, spatial reasoning, visual Q&A.

Lightning payments • No signup required • Instant access

Document Extraction (OCR)

Extract text from PDFs, images, and documents as Markdown. Handles complex layouts, tables, handwriting.

Lightning payments • No signup required • Instant access

Receipt OCR

Extract structured data from receipts and invoices. Returns JSON with merchant, items, totals.

Lightning payments • No signup required • Instant access

Private Document Analysis

Analyze confidential documents with AI. Processed in memory only — nothing stored.

Lightning payments • No signup required • Instant access

3D Model Generation

Convert photos to textured 3D GLB models with AI.

Lightning payments • No signup required • Instant access

File Conversion

Convert between 200+ file formats. Documents, images, audio, video.

Lightning payments • No signup required • Instant access

PDF Tools

Convert to/from PDF, merge multiple PDFs, convert HTML/Markdown to PDF.

Lightning payments • No signup required • Instant access

HTML to PDF

Convert HTML or Markdown into a downloadable PDF document.

Lightning payments • No signup required • Instant access

L402 API

Access all 40+ tools programmatically. HTTP 402 + Lightning invoice = the payment is the credential.

Lightning payments • No signup required • Instant access

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.

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