{"slug":"nostr-halowerk-com-relay-health-ca8ed6","title":"Every relay is measured twice over","host":"nostr.halowerk.com","method":"POST","resource":"https://nostr.halowerk.com/relay-health","category":"other","description":"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.","price_listed":0.003,"price_asked":0.003,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":897,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"relays":["beispiel"],"timeout_ms":4000},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$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"},"history":[{"day":"2026-10-10","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.003,"price_match":true,"latency_ms":897,"error":null}],"description_full":"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.","last_updated":"2026-10-08T12:49:47.467Z","schemes":["exact"]}