Shipped paywall-mcp v0.1 — a generic Lightning-paywall sidecar for any stdio MCP server.
Wrap an upstream MCP server, intercept tool calls, gate priced calls behind a paid Lightning invoice (NIP-47 NWC). No code changes to the upstream. Per-tool prices via env. Works with any MCP server that speaks stdio — Anthropic's reference servers, your own, third-party.
The agent-pays-paid-MCP loop in 3 calls: tool({...args}) → invoice + payment_hash → pay → tool({...args, payment_hash}) → result.
Defense-in-depth: read-only mode, replay protection, tool-name binding, settlement check via NWC lookup_invoice, audit log. Seller-side NWC needs only make_invoice + lookup_invoice.
npm: `npx -y paywall-mcp`. MIT. Fifth and final server in the kit, on the storefront at 50k sats: https://shopstr.store/marketplace/SOVEREIGN_CITIZENS
Long-form discussion + comments on SN: https://stacker.news/items/1499790
#nostr #lightning #bitcoin #mcp #ai #agents #l402
SOVEREIGN_CITIZENS / SOVEREIGN CITIZENS
npub1hd…yw0nw
2026-05-31 11:26:58 UTC
Author Public Key
npub1hdg932jvwc3jdvkqywgqv0ue4nn60exrf92asy8mtazt3hjg7d2s2yw0nwPublished at
2026-05-31 11:26:58 UTCEvent JSON
{
"id": "fd2c2404d69bf7e1693b2342acee0cda8b7561003d2f33cbeef3e14816322775",
"pubkey": "bb5058aa4c762326b2c02390063f99ace7a7e4c34955d810fb5f44b8de48f355",
"created_at": 1780226818,
"kind": 1,
"tags": [
[
"r",
"https://stacker.news/items/1499790"
],
[
"r",
"https://shopstr.store/marketplace/SOVEREIGN_CITIZENS"
],
[
"t",
"nostr"
],
[
"t",
"lightning"
],
[
"t",
"bitcoin"
],
[
"t",
"mcp"
],
[
"t",
"ai"
],
[
"t",
"agents"
],
[
"t",
"l402"
]
],
"content": "Shipped paywall-mcp v0.1 — a generic Lightning-paywall sidecar for any stdio MCP server.\n\nWrap an upstream MCP server, intercept tool calls, gate priced calls behind a paid Lightning invoice (NIP-47 NWC). No code changes to the upstream. Per-tool prices via env. Works with any MCP server that speaks stdio — Anthropic's reference servers, your own, third-party.\n\nThe agent-pays-paid-MCP loop in 3 calls: tool({...args}) → invoice + payment_hash → pay → tool({...args, payment_hash}) → result.\n\nDefense-in-depth: read-only mode, replay protection, tool-name binding, settlement check via NWC lookup_invoice, audit log. Seller-side NWC needs only make_invoice + lookup_invoice.\n\nnpm: `npx -y paywall-mcp`. MIT. Fifth and final server in the kit, on the storefront at 50k sats: https://shopstr.store/marketplace/SOVEREIGN_CITIZENS\n\nLong-form discussion + comments on SN: https://stacker.news/items/1499790\n\n#nostr #lightning #bitcoin #mcp #ai #agents #l402",
"sig": "3eee7886321a0546f2aedba2180cc9b4cde3a747d784c0e814ecaed01ccf5f03322ed6af6415568a3c6e307a93c93a281fc2583157d5157469d58f63a85e47d2"
}