fastr

Online

wss://relay.cyberguy.fyi

A high-performance Nostr relay

Score75

Connection

Connect: 112 ms
Read: 53 ms
Write: 15 ms
Network: Clearnet
Last checked: 7 hours ago
Last online: 7 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: 0
as read relay: 0
as write relay: 0
NIP-66 monitors: 2
Notes in the last hour: 152

Supported NIPs

Access & policy

Authentication (NIP-42): No
Payment required: No
Restricted writes: No
Sends AUTH challenge: Yes
Minimum PoW (NIP-13): None
Write test: Accepted our test event

Limits

Max message length: 2.1M
Max subscriptions: 20
Max filter limit: 500
Max content length: 51K
Max event tags: 2,000

Overview

Software: fastr
Version: 0.1.0
Contact: npub1ven4zk8xxw873876gx8y9g9l9fazkye9qnwnglcptgvfwxmygscqsxddfh
Countries: —n/a
Languages: —n/a
First seen: Oct 30, 2026, 12:17 AM UTC
Discovered via: nip66
Terms of service: View all

NIP-11 document

{
  "name": "fastr",
  "description": "A high-performance Nostr relay",
  "banner": "https://relay.cyberguy.fyi/banner.png",
  "icon": "https://relay.cyberguy.fyi/icon.png",
  "pubkey": "66675158e6338fe89fda418e42a0bf2a7a2b132504dd347f015a18971b644430",
  "contact": "npub1ven4zk8xxw873876gx8y9g9l9fazkye9qnwnglcptgvfwxmygscqsxddfh",
  "supported_nips": [
    1,
    9,
    11,
    17,
    34,
    40,
    42,
    45,
    50,
    62,
    70,
    77
  ],
  "software": "https://github.com/arx-ccn/fastr",
  "version": "0.1.0",
  "terms_of_service": "https://relay.cyberguy.fyi/tos.txt",
  "limitation": {
    "max_message_length": 2097152,
    "max_subscriptions": 20,
    "max_limit": 500,
    "max_subid_length": 64,
    "max_event_tags": 2000,
    "max_content_length": 51200,
    "min_pow_difficulty": 0,
    "auth_required": false,
    "created_at_lower_limit": 0,
    "created_at_upper_limit": 172800,
    "default_limit": 500
  }
}

Use this data

View JSON

curl

curl "/api/v1/relays/relay.cyberguy.fyi"