Every relay is measured twice over
Every relay is measured twice over. Over WebSocket a genuine REQ query is sent and the connection time, the time to end of stored events and the number of events returned are recorded — a relay that accepts the connection and then stays silent is the failure mode a reachability ping cannot see.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
897 msmedian answer time
$0.003listed price per call
$0.003price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://nostr.halowerk.com/relay-health
| Category | Everything else |
|---|---|
| Provider host | nostr.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.003 | 897 ms |
Example input (from the provider)
{
"body": {
"relays": [
"beispiel"
],
"timeout_ms": 4000
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"probe_kind": {
"default": 1,
"description": "Event kind used for the probe query.",
"maximum": 65535,
"minimum": 0,
"type": "integer"
},
"read_nip11": {
"default": true,
"description": "Also read the NIP-11 information document over https.",
"type": "boolean"
},
"relays": {
"description": "wss relay addresses. Left empty, ten measured default relays are used.",
"items": {
"type": "string"
},
"maxItems": 12,
"minItems": 1,
"type": "array"
},
"timeout_ms": {
"default": 4000,
"description": "Time limit per relay in milliseconds.",
"maximum": 6000,
"minimum": 500,
"type": "integer"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}