pubsub.cat

Usage

First, you’ll need to obtain an endpoint from https://pubsub.cat/endpoints.json.

[!NOTE] The TLS endpoint is merely to allow for usage in “secure contexts” and does not provide real security as the private key we use is public.

WebSocket

• To subscribe to a topic, send a frame with + followed by the topic. For example, +test to subscribe to topic test.
  • When a message is published, a frame is sent, containing the topic and message, joined by a colon. For example, “Hello” sent to topic test would be a frame containing test:Hello.
• To unsubscribe from a topic, send a frame with - followed by the topic.
• To publish a message, send a frame that’s a concatenation of ^, the topic, :, and the message. For example, ^test:Hello to publish “Hello” to topic test.

HTTP

• To publish a message, send a request with path “/pub” and a “topic” query argument. For example, curl notls.pubsub.cat/pub?topic=test --data "Hello" to send “Hello” to every subscriber of test.