Maximum Sats
Bitcoin tools and APIs, powered by Lightning. Pay per request. No accounts. No subscriptions.
Tools
AI DVM
AI text generation via Lightning
Web of Trust Report
Nostr trust analysis via PageRank
Nostr Profile Summary
AI analysis of any Nostr user
Lightning Network Analysis
AI-powered LN insights with live data
BOLT11 Invoice Decoder
Decode Lightning invoices into structured fields
BOLT11 Invoice Inspector
Check invoice expiry and remaining lifetime
BOLT11 Expiry Checker
Quick expiry status with urgency signal
BOLT11 Amount Extractor
Extract sats/msats and zero-amount status
BOLT11 Description Inspector
Check plaintext vs hash-only invoice descriptions
BOLT11 Network Classifier
Detect mainnet/testnet/signet/regtest from invoice HRP
BOLT11 Payee Inspector
Extract payee pubkey and explicit payee-tag signal
BOLT11 Payment Secret Inspector
Extract payment_secret and tag-s presence from BOLT11
BOLT11 Created-At Inspector
Extract invoice timestamp and age metadata
BOLT11 Min-Final-CLTV Inspector
Extract tag-c routing finality requirements
BOLT11 Route-Hints Inspector
Inspect tag-r hint count and payload sizing
BOLT11 Tag Inventory
Count and classify invoice tags in one paid call
BOLT11 Payment-Hash Inspector
Inspect payment_hash and validate tag consistency
BOLT11 Description-Hash Inspector
Inspect description_hash tag and validate hash format
BOLT11 Feature-Bits Inspector
Inspect tag-9 feature bit payloads quickly
BOLT11 Signature Inspector
Inspect signature hex + recovery id quickly
Lightning Address Resolver
Resolve name@domain to LNURL-pay metadata
Lightning Address Parser
Normalize LUD-16 and derive integration URLs
BIP21 URI Parser
Parse bitcoin: URIs into normalized payment fields
BIP21 URI Builder
Build bitcoin: URIs from address + payment fields
BIP21 URI Normalizer
Canonicalize bitcoin: URIs for deterministic output
NIP-05 Identity Verifier
Verify Nostr identities from nostr.json
npub Decoder
Convert npub identifiers to hex pubkeys
npub Encoder
Convert hex pubkeys to npub identifiers
nprofile Decoder
Extract pubkey + relay hints from nprofile TLV
nprofile Encoder
Build nprofile identifiers from hex pubkeys + relay hints
nevent Decoder
Extract event id + relay hints from nevent TLV
nevent Encoder
Build nevent identifiers from event id + optional TLV hints
naddr Decoder
Extract identifier + author + kind from naddr TLV
naddr Encoder
Build naddr identifiers from identifier + author + kind
nrelay Decoder
Extract normalized relay URL(s) from nrelay TLV
note Decoder
Convert note identifiers to hex event IDs
note Encoder
Convert hex event IDs to note identifiers
LNURL Encoder
Convert callback URLs or Lightning Addresses into LNURL strings
LNURL Decoder
Convert LNURL bech32 strings to callback URLs
Nostr ID Inspector
Inspect and decode any Nostr bech32 identifier
L402 Proof Replay Generator
Generate paid retry templates for flaky L402 endpoints
L402 Challenge Parser
Normalize 402 challenge headers and payloads
L402 Hash Verifier
Catch payment_hash mismatches before paid retry
L402 Auth Builder
Generate paid retry auth variants from challenge data
L402 Auth Diagnoser
Diagnose 401/402 paid retry failures and get next auth plan
Bitcoin Fee Estimation
Get on-chain fee estimates from mempool.space
/api/catalog has a machine-readable list of paid endpoints, prices, and MCP tool names.
New to L402 retries? Start with the proof replay quickstart.
Latest Posts
L402 Proof Replay Quickstart: 402 to Paid Retry in 60 Seconds
Copy-paste flow for turning an L402 payment challenge into a successful paid retry using /api/proof-replay.
Give Your AI Agent a Trust Layer with MCP + Nostr WoT
How to add Nostr Web of Trust scoring to your AI agent using MCP. Check trust scores, detect sybils, and verify identities — all from your agent's tool palette.
Accept Bitcoin on Shopify Without Giving Up Your Keys
A self-custodial Lightning payment integration for Shopify using LNbits. No middlemen, no custody risk, no monthly fees.
Lightning Node
MCP Server
All tools available as an MCP server. Add to Claude Code, Cursor, or any MCP client:
{
"mcpServers": {
"maximumsats": {
"url": "https://maximumsats.com/mcp"
}
}
}Tip Jar
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