AsyncAPI channel · Polygon.io
· Polygon.io WebSocket APIs
business/crypto/FMV
Stream Fair Market Value for a crypto pair over the Business feed.
Channel address
business/crypto/FMV
Operations
subscribe
subscribeCryptoFMV
Receive Fair Market Value events for crypto.
Messages
FairMarketValue
Polygon's proprietary fair value estimate for the asset.
Content-Type:
application/jsonAbout 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.