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Relays

relay.nostr.build

Online
wss://relay.nostr.build

A horizontally scalable Nostr relay on Cloudflare Durable Objects

PaidAuth
ScoreScore: 78

Connection

Connect
1.1 s
Read
70 ms
Write
—n/a
Network
Clearnet
Last checked
3 hours ago
Last online
3 hours ago

Uptime

Last 24 hours
100%
Last 7 days
100%
Each bar is one check (every 6 hours), newest on the right.

Popularity

Listed by users
1
as read relay
1
as write relay
1
NIP-66 monitors
1
Notes in the last hour
—n/a

Supported NIPs

Access & policy

Authentication (NIP-42)
Yes
Payment required
Yes
Restricted writes
Yes
Sends AUTH challenge
Yes
Minimum PoW (NIP-13)
None
Write test
Rejected: blocked: payment required, visit https://relay.nostr.build to get access

Limits

Max message length
98K
Max subscriptions
64
Max filter limit
500
Max content length
—n/a
Max event tags
2,500

Overview

Software
relay.nostr.build
Version
1.0.0
Contact
admin@nostr.build
Countries
—n/a
Languages
—n/a
First seen
Oct 30, 2026, 12:17 AM UTC
Discovered via
nip66, nip65
Payment page
View all

NIP-11 document

{
  "name": "relay.nostr.build",
  "description": "A horizontally scalable Nostr relay on Cloudflare Durable Objects",
  "icon": "https://cdn.nostr.build/logo/nb404x465.png",
  "pubkey": "8fb140b4e8ddef97ce4b821d247278a1a4353362623f64021484b372f948000c",
  "self": "e436c2be919b42bc60732fb219c293dbede51c50342ec831fa6e05f5ffb35e36",
  "contact": "admin@nostr.build",
  "supported_nips": [
    1,
    2,
    4,
    9,
    11,
    13,
    17,
    40,
    42,
    45,
    59,
    62,
    65,
    70
  ],
  "software": "https://github.com/nostrbuild/relay.nostr.build",
  "version": "1.0.0",
  "payments_url": "https://relay.nostr.build",
  "limitation": {
    "max_message_length": 98304,
    "max_subscriptions": 64,
    "max_limit": 500,
    "max_subid_length": 64,
    "max_event_tags": 2500,
    "auth_required": true,
    "payment_required": true,
    "restricted_writes": true,
    "default_limit": 500
  },
  "fees": {
    "admission": [
      {
        "amount": 69000000,
        "unit": "msats"
      }
    ]
  }
}

Use this data

View JSON
curl
curl "/api/v1/relays/relay.nostr.build"