You can get the online ones at the moment from https://api.nostr.watch/v1/online clean up the list a bit and use something like :

```

#!/bin/bash

input_file="cleaned_relays.txt"

output_file="relay_nips_output.txt"

specific_nip=45

> "$output_file"

while IFS= read -r relay; do echo "Querying $relay"

relay_name=$(echo "$relay" | awk -F[/:] '{print $4}')

response=$(curl -s --max-time 10 -H "Accept: application/nostr+json" "$relay")

nips=$(echo "$response" | jq '.supported_nips | @csv' | tr -d '"')

if echo "$nips" | grep -q "\b$specific_nip\b"; then echo "Supported NIPs for $relay_name ($relay): $nips"

echo "Relay Name: $relay_name" >> "$output_file" echo "Relay URL: $relay" >> "$output_file" echo "Supported NIPs: $nips" >> "$output_file" echo "" >> "$output_file"

fi done < "$input_file"

```

Takes awhile but will give you something like this: