Subscriber verification handshake. When a subscriber URL is registered or updated on dev.fitbit.com, Fitbit issues two GET requests with a `verify` query parameter. Respond 204 to the verification code shown in the developer console and 404 to the intentionally-incorrect second code.
Subscriber registration handshake. Two GETs are issued — one with the correct verification code (respond 204) and one with an incorrect code (respond 404). Responses must arrive within 5 seconds.
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.
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