This NIP defines a mechanism for clients to attach ecash tokens (Cashu) to Nostr events as stamps — anonymous per-event micropayments to relays. Stamps solve two fundamental problems for the Nostr relay ecosystem: spam prevention and relay sustainability.
https://github.com/keychat-io/keychat-protocol/blob/main/nips/nip-estamp.md
npub1h0…srwx8
2026-03-06 05:10:47 UTC
Author Public Key
npub1h0uj825jgcr9lzxyp37ehasuenq070707pj63je07n8mkcsg3u0qnsrwx8Seen on
wss://nos.lolPublished at
2026-03-06 05:10:47 UTCEvent JSON
{
"id": "5dbf57b5f2a17c20871010dae7b7c1224e26d364ca7bc2c7ce7512dec43665d0",
"pubkey": "bbf923aa9246065f88c40c7d9bf61cccc0ff3fcff065a8cb2ff4cfbb62088f1e",
"created_at": 1772773847,
"kind": 1,
"tags": [
[
"client",
"nosotros",
"31990:c6603b0f1ccfec625d9c08b753e4f774eaf7d1cf2769223125b5fd4da728019e:1728437063755"
]
],
"content": "This NIP defines a mechanism for clients to attach ecash tokens (Cashu) to Nostr events as stamps — anonymous per-event micropayments to relays. Stamps solve two fundamental problems for the Nostr relay ecosystem: spam prevention and relay sustainability. \n\nhttps://github.com/keychat-io/keychat-protocol/blob/main/nips/nip-estamp.md",
"sig": "7cd4f62a45ffec14dbd0167fc1af37de42a35c9275abdaffd4a441b57f4d185943d364281a08f28d321d51235ec3a7e4e19570b70de9e72446524ee989ae8535"
}