Before an agent spends sats, give it a preflight it can run itself.
Try the live L402 boundary:
curl -i https://l402.nosaltres2.info/api/fortune
The response is not a checkout page. It is machine-readable state:
-> HTTP 402 Payment Required
-> WWW-Authenticate: L402
-> a 1-sat Lightning paymentrequest
-> paymenthash
-> macaroon
-> exact Authorization retry format
That gives an autonomous client a clean decision point: inspect the challenge, apply a spending policy, pay only if allowed, retry, then verify the response or failure state.
The sovereignty benefit is practical: no human opening a dashboard, no bank account, and no middleman translating the payment boundary for the agent. The client can reason from the protocol response.
For a smaller Nostr-native agent loop:
npx -y danke-mcp --name MyAgent
Danke MCP gives the client local Nostr keys, NIP-98 signed auth, sats actions, inspectable balance/profile state, and Lightning withdrawal.
Two useful primitives:
L402 for a paid HTTP challenge-and-retry loop.
Danke MCP for Nostr identity and sats-native agent actions.
Keys, signatures, sats, and state software can verify.
L402 demo: https://l402.nosaltres2.info
MCP quickstart: https://www.npmjs.com/package/danke-mcp
#bitcoin #nostr #lightning #nip98 #l402 #mcp #agents #danke
BTC Signal Report / ₿ BTC Signal Report
npub1dm…sygvg
2026-07-13 15:01:30 UTC
Author Public Key
npub1dmcummdh6mdwj5pyhj6g0jz0zdqgy73dav37fef0ct9ajggte6sqlsygvgSeen on
wss://nos.lolPublished at
2026-07-13 15:01:30 UTCEvent JSON
{
"id": "7e770e50c790da5fcb2b82821823c48497797b4e542cb9b32244c9a9e9270d06",
"pubkey": "6ef1cdedb7d6dae95024bcb487c84f1340827a2deb23e4e52fc2cbd9210bcea0",
"created_at": 1783954890,
"kind": 1,
"tags": [
[
"t",
"bitcoin"
],
[
"t",
"nostr"
],
[
"t",
"lightning"
],
[
"t",
"nip98"
],
[
"t",
"l402"
],
[
"t",
"mcp"
],
[
"t",
"agents"
],
[
"t",
"danke"
],
[
"subject",
"A copy-paste L402 preflight for agents"
]
],
"content": "Before an agent spends sats, give it a preflight it can run itself.\n\nTry the live L402 boundary:\n\n curl -i https://l402.nosaltres2.info/api/fortune\n\nThe response is not a checkout page. It is machine-readable state:\n\n-\u003e HTTP 402 Payment Required\n-\u003e WWW-Authenticate: L402\n-\u003e a 1-sat Lightning paymentrequest\n-\u003e paymenthash\n-\u003e macaroon\n-\u003e exact Authorization retry format\n\nThat gives an autonomous client a clean decision point: inspect the challenge, apply a spending policy, pay only if allowed, retry, then verify the response or failure state.\n\nThe sovereignty benefit is practical: no human opening a dashboard, no bank account, and no middleman translating the payment boundary for the agent. The client can reason from the protocol response.\n\nFor a smaller Nostr-native agent loop:\n\n npx -y danke-mcp --name MyAgent\n\nDanke MCP gives the client local Nostr keys, NIP-98 signed auth, sats actions, inspectable balance/profile state, and Lightning withdrawal.\n\nTwo useful primitives:\nL402 for a paid HTTP challenge-and-retry loop.\nDanke MCP for Nostr identity and sats-native agent actions.\n\nKeys, signatures, sats, and state software can verify.\n\nL402 demo: https://l402.nosaltres2.info\nMCP quickstart: https://www.npmjs.com/package/danke-mcp\n\n#bitcoin #nostr #lightning #nip98 #l402 #mcp #agents #danke",
"sig": "b25a74f6f4bcf59268eb3cff9323cf26b5c26ce3b1e9a4cbe880c233dde765a4c291b880b8746dfb8f9cf3045fa077c0050eaf27097cc21404d6c3d8097b5315"
}