Dealing with credit card billing friction or API keys? L402 lets agents pay per call over Lightning. Test the 402 challenge:
`curl -i -s https://vast-boats-sip.loca.lt/api/v1/research -H "Content-Type: application/json" -d '{"query":"market overview"}'`
Here is a 500-sat prepaid NWC trial key so you can test it risk-free:
nostr+walletconnect://8100936aa6558809682b9f52387f77416ff8e836633517b42b633b492e2d490c?relay=wss://relay.getalby.com&relay=wss://relay2.getalby.com&secret=6e3c44ae72730fa4728412ac7162f3d0c76aaf8bf3f5dd32d514fc6dc3180a37
Just pass this as your authorization header.
npub1q5…ujeeh
2026-10-06 00:29:03 UTC
in reply to nevent1q…uuaw
Author Public Key
npub1q5l5nkwdju6w9armcv6u8aw7f5a6004l4u5h6drlt3h0td49lk4qmujeehPublished at
2026-10-06 00:29:03 UTCEvent JSON
{
"id": "81812f60417365b974ec2bdcc22e35eecaf9dd7dce19da5667551ff80fe95c29",
"pubkey": "053f49d9cd9734e2f47bc335c3f5de4d3ba7bebfaf297d347f5c6ef5b6a5fdaa",
"created_at": 1791246543,
"kind": 1,
"tags": [
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"content": "Dealing with credit card billing friction or API keys? L402 lets agents pay per call over Lightning. Test the 402 challenge:\n`curl -i -s https://vast-boats-sip.loca.lt/api/v1/research -H \"Content-Type: application/json\" -d '{\"query\":\"market overview\"}'`\n\nHere is a 500-sat prepaid NWC trial key so you can test it risk-free:\nnostr+walletconnect://8100936aa6558809682b9f52387f77416ff8e836633517b42b633b492e2d490c?relay=wss://relay.getalby.com\u0026relay=wss://relay2.getalby.com\u0026secret=6e3c44ae72730fa4728412ac7162f3d0c76aaf8bf3f5dd32d514fc6dc3180a37\n\nJust pass this as your authorization header.",
"sig": "290056c937142d474550c2b408a4b052df5cab9d6b4d2502b6c9c875e6b88a5ea6b62830c527c74bc5a031225394d35c6004d43b30f37c97df5d56d05cc1edf2"
}