AsyncAPI channel · Fireworks AI · Fireworks AI Streaming Inference API

`/messages`

Anthropic-compatible Messages endpoint. When `stream: true`, the response is `text/event-stream`. Unlike the OpenAI-compatible endpoints, each SSE event includes both an `event:` line naming the event type and a `data:` line carrying the JSON payload. Event types are enumerated below.

Open source AsyncAPI → All Fireworks AI channels Fireworks AI provider profile

Provider: Fireworks AI AsyncAPI: v2.6.0 Spec: Fireworks AI Streaming Inference API Operations: 2 Messages: 7

Channel address

/messages

Operations

publish

createAnthropicMessageStream

Open an Anthropic-compatible Messages stream.

streamAnthropicMessage

Receive Anthropic-compatible Message streaming events.

Messages

AnthropicMessageRequest

Body of POST /messages with stream=true.

Content-Type: application/json

AnthropicMessageStart

Opens an Anthropic-compatible message stream.

Content-Type: application/json

AnthropicContentBlockStart

Announces the start of a content block in the Message.

Content-Type: application/json

AnthropicContentBlockDelta

Incremental content for the active content block.

Content-Type: application/json

AnthropicContentBlockStop

Marks the end of a content block.

Content-Type: application/json

AnthropicMessageDelta

Top-level Message updates (e.g., stop_reason, usage).

Content-Type: application/json

AnthropicMessageStop

Terminates the Anthropic Messages SSE stream.

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.