Sats4AI Blog
Step-by-step guides for using AI tools with Bitcoin Lightning payments. No signup, no KYC — just sats.
The Identity Tax: Why Every AI Tool Wants Your Card on File
Every major AI service demands the same thing before you type a single prompt: email, phone, card on file, signed terms. That wall is a business model, not a technical requirement. Here's what it actually costs you.
How to Send and Receive Faxes with Bitcoin Lightning
Fax without a fax machine. Send PDFs, photos, or typed notes. Receive faxes in your email with optional OCR. 500 sats per fax — no account, no phone line.
Sats4AI Now Available Over Tor — Full API Access at .onion
Every tool and API endpoint is now accessible as a Tor hidden service. No clearnet required, no IP logged, no account needed. Tor Browser users visiting sats4ai.com see an automatic ".onion available" banner.
Agent Ergonomics Upgrade: Cost Estimates, Auto-Routing, Structured Errors, and /docs
Ten new patterns shipped across the Sats4AI API — a combined /docs page, pre-payment cost estimates, model: 'auto' routing, machine-readable error codes, standardized async responses, dedup, and CORS for browser agents.
Music 2.6: BPM/Key Control, 6-Minute Songs, and 14+ Section Tags
We upgraded from Music-1.5 to Music-2.6. Specify exact BPM and key, write 3,500-char lyrics with 14 section tags, generate instrumental-only tracks, and get songs up to 6 minutes. 300 sats per song.
Featured on lncurl.lol: Generate Music with L402 — Pay with Bitcoin, Get a Song
lncurl.lol published a tutorial generating original songs via Sats4AI's L402 music endpoint. One command, one Lightning payment, one MP3. No account, no API key.
Why AI Agents Can't Just Curl Paid APIs
Most MCPs are wrappers around CLIs your model already knows. Payment is the exception. Side-by-side comparison of raw curl vs MCP for Lightning-gated APIs.
Featured in Blockspace: How to Make Your First AI Agentic Payment with Bitcoin
Blockspace published a step-by-step tutorial showing how AI agents pay for real-world actions with Bitcoin Lightning. Three commands, one phone call, zero accounts.
Agent-to-Agent Phone Calls: The First True AI Negotiation Loop
Two AI agents negotiating a phone call in real time — push-back, clarification, auto-retry, transcript analysis. Live production infrastructure for orchestrators.
Machine Payment Protocol (MPP) Explained: How HTTP 402 Became a Real Standard
What MPP is, how it differs from L402, why Stripe and Tempo co-launched it, and what it means for AI agents paying for APIs.
Analyze PSBTs Privately Before You Sign — Bitcoin Transaction Decoder
Understand what you're about to sign. Decode any PSBT into plain English — inputs, outputs, fees, scripts. No account, no logs.
Decode Lightning Invoices Privately — BOLT11 Analyzer
See the amount, expiry, destination, and description of any Lightning invoice. Free decode + AI explanation for 5 sats.
Ask Satoshi — Query the Whitepaper, Forum Posts & Private Emails
Ask questions about the Bitcoin whitepaper, Satoshi's forum posts, mailing list emails, and 294 private emails to 9 correspondents. Three source modes, 21 sats per question.
How to Chat with AI Using Bitcoin Lightning
Access frontier AI models from 1 sat per message. No account, no subscription — just pay per query with Lightning.
How to Generate AI Images with Bitcoin Lightning
Generate photorealistic images from text prompts for as low as 100 sats. No signup, no monthly plan.
Private AI Document Analysis — No Account, No Trace
Analyze confidential contracts, financial records, and legal documents with AI. No account, no storage, no data retention.
How to Translate Text with Bitcoin Lightning
Translate text between 30 languages with per-character pricing. From 4 sats, three model tiers.
How to Extract Text from PDFs with Bitcoin Lightning (OCR)
Extract text from scanned PDFs and images with AI. 10 sats/page, 30+ languages including handwriting.
How to Extract Receipt Data with Bitcoin Lightning
Turn receipts and invoices into structured JSON with merchant, items, totals, and category. 50 sats/page.
How to Analyze Images with AI Using Bitcoin Lightning
Extract text, describe scenes, and answer questions about any image. 21 sats per analysis.
How to Transcribe Audio with Bitcoin Lightning
Convert meetings, podcasts, and interviews to text with timestamps. 10 sats/min, up to 1 GB files.
How to Generate AI Videos with Bitcoin Lightning
Create short video clips from text or images. Pay per second of output — no subscription required.
How to Edit Images with AI Using Bitcoin Lightning
Remove objects, change backgrounds, and transform images with natural language. Up to 4K resolution.
How to Convert Text to Speech with Bitcoin Lightning
Turn any text into natural-sounding audio. 300 sats per generation, supports custom cloned voices.
How to Turn Any Image into AI Video with Bitcoin Lightning
Animate any photo into video with AI motion and synced audio. 100 sats/second, no account.
How to Generate AI Music with Bitcoin Lightning
Generate original songs with lyrics and vocals from a text prompt. 300 sats, no account.
How to Clone Your Voice with AI Using Bitcoin Lightning
Create a permanent Voice ID from a 10-second sample. 7,500 sats one-time, then unlimited TTS.
How to Convert Any Book to an Audiobook with Bitcoin Lightning
Upload an EPUB, PDF, or TXT file and get a full audiobook narrated by AI. 3 quality tiers, 602+ languages, voice cloning and voice design.
AI Agent Tool Discovery: How MCP and Lightning Enable Pay-Per-Use AI
How agents discover 25+ AI tools via MCP and pay per request with Lightning. No API keys, no subscriptions.
What Your OpenClaw Agent Can Do with Sats4AI
One config line gives your AI agent 10+ tools. Real use cases: image pipelines, document processing, voice automation.
How to Convert Files with Bitcoin Lightning
Convert between 200+ file formats — images, documents, video, audio. 100 sats per file, up to 1 GB.
How to Convert and Merge PDFs with Bitcoin Lightning
Convert PDFs to DOCX, Markdown, HTML and more — or merge multiple PDFs into one. 200 sats.
How to Convert HTML to PDF with Bitcoin Lightning
Turn any HTML or URL into a clean PDF document. 50 sats per conversion, no account required.
How to Send SMS with Bitcoin Lightning
Send text messages to any number in 200+ countries. From 5 sats — no phone plan, no account.
How to Make Phone Calls with Bitcoin Lightning
Call real phone numbers from your browser — no SIM card, no phone plan. Or automate calls via API.
How to Send Email with Bitcoin Lightning
Send email to any address for 200 sats. No SMTP setup, no account, no configuration.
How to Generate 3D Models with Bitcoin Lightning
Turn any image into a GLB 3D model in ~30 seconds. Compatible with Unity, Blender, and 3D printers.