AsyncAPI channel · Nostr · Nostr Relay Protocol

`/`

The single WebSocket channel exposed by a Nostr relay. All client-to-relay and relay-to-client messages flow over this connection as JSON arrays. From the client's perspective, `publish` operations send messages to the relay and `subscribe` operations receive messages from the relay.

Open source AsyncAPI → All Nostr channels Nostr provider profile

Provider: Nostr AsyncAPI: v2.6.0 Spec: Nostr Relay Protocol Operations: 2 Messages: 10

Channel address

/

Operations

publish

sendToRelay

Messages a client sends to a relay.

receiveFromRelay

Messages a relay sends to a client.

Messages

ClientEvent

Publish a signed event to the relay.

Content-Type: application/json

ClientReq

Open or replace a subscription with one or more filters.

Content-Type: application/json

ClientClose

Terminate a previously opened subscription.

Content-Type: application/json

ClientAuth

Respond to a relay AUTH challenge with a signed kind 22242 event.

Content-Type: application/json

RelayEvent

Stream a stored or live event matching an open subscription.

Content-Type: application/json

RelayOk

Acknowledge a published EVENT or AUTH event.

Content-Type: application/json

RelayEose

Mark the end of stored events for a subscription.

Content-Type: application/json

RelayClosed

Indicate the relay has terminated a subscription.

Content-Type: application/json

RelayNotice

Surface a human readable message from the relay.

Content-Type: application/json

RelayAuthChallenge

Challenge the client to authenticate.

Content-Type: application/json

About AsyncAPI

The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.

Browse every event-driven channel on the APIs.io network or compare with the broader Naftiko capability, Agent Skill, and MCP server surfaces of the same providers.