AsyncAPI channel · Contextual AI · Contextual AI Agent Query Streaming (HTTP + SSE)

/agents/{agent_id}/query

Agent query SSE stream. The client opens this channel by issuing `POST /agents/{agent_id}/query` with `Content-Type: application/json` and a JSON body containing `stream: true`. The server responds with `Content-Type: text/event-stream` and emits a sequence of `data:` lines carrying grounded response token deltas, optional attribution and retrieval events, and a final completion event.

Provider: Contextual AI AsyncAPI: v2.6.0 Spec: Contextual AI Agent Query Streaming (HTTP + SSE) Operations: 1 Messages: 3

Channel address

/agents/{agent_id}/query

Parameters

Operations

streamAgentQueryEvents
Subscribe to streamed agent query events (SSE).

Messages

MessageDelta
A single SSE `data:` event carrying one delta of the grounded agent response. Many of these are emitted per request, in order.
Content-Type: application/json
AttributionEvent
SSE event carrying inline attribution or retrieval-content metadata for the grounded response.
Content-Type: application/json
QueryComplete
Terminal SSE event marking the end of the grounded response stream, carrying the final message identifiers and groundedness scores.
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 Agent Skill and MCP server surfaces of the same providers.

Work with this as data

Every channel here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for event channels

4 MCP tools reach this
  • find_channelsBrowse and filter every channel in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This channel
curl "https://apis.io/api/v1/channels/agents-agent-id-query"
All event channels
curl "https://apis.io/api/v1/channels?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.