Inspector events

Each event has id, ts (ms), kind, title, and optionally runId, serverId, durationMs, direction (in/out), level (info/warn/error) and data.

Kind	Emitted when	data
run.start	A chat turn starts	profile, model, tools (names), system (full system prompt)
llm.request	Each model step begins	model, provider, body (provider request body), warnings
llm.response	Each model step ends	finishReason, usage, response (id, modelId)
tool.call	The model (or you, or an app) calls a tool	id, input, rawInput (the arguments as the model streamed them), invalid when they couldn’t be parsed; for MCP tools lineage (id of the first attempt, attempt, fingerprint); duplicateOf when it repeats an earlier call that may write (level warn)
tool.result	A tool returns	id, output, lineage; possibleDoubleWrite when an earlier attempt’s outcome is unknown (level warn)
tool.progress	A server reports notifications/progress for a tool call	id (tool call), tool, progress, total, message
tool.error	A tool throws or returns isError	id, error, errorClass (timeout, cancelled, transport, protocol, tool, declined, input, other), lineage; outcomeUnknown when a tool that may write failed before it could answer
skill.load	load_skill runs	id
run.finish	A turn completes	usage totals
run.error	A turn fails or is stopped	error name, message, HTTP status, response body
mcp.status	A server connects, fails or disconnects	status, error, serverInfo, tools count
mcp.rpc	Any JSON-RPC message to/from a server	the raw message
mcp.unanswered	The connection closed while a request was still open	id, method, waitedMs, reason
mcp.http	An HTTP request to a remote server fails (4xx/5xx or no response)	method, url, status or error, masked requestHeaders, responseHeaders (e.g. www-authenticate), configured
resource.updated	A subscribed resource changed (notifications/resources/updated)	uri
mcp.log	A stdio server writes to stderr, or the client errors	the line
ui.rpc	An MCP App message crosses the iframe boundary	the raw JSON-RPC (or MCP-UI) message
ui.action	An A2UI button is pressed	the resolved action
interaction.request	A tool approval, elicitation or sampling request is waiting for the user	the request, with its id and kind
interaction.resolved	That request was answered or cancelled	id, kind, outcome, response
agent.request	Moka sends a turn to a remote agent	A2A JSON-RPC body or AG-UI RunAgentInput
agent.event	An A2A result or AG-UI event arrives	the raw event; AG-UI RAW events are collapsed into one count/events entry per run
agent.response	The agent’s turn is done
log	Warnings, e.g. a server skipped because it couldn’t connect

Correlation fields

Field	On	Meaning
rpc.id / rpc.method	mcp.rpc, mcp.unanswered	The JSON-RPC id and the request’s method
rpc.pairId	responses, cancellations, mcp.unanswered	Event id of the request they belong to
rpc.outcome	same	ok, error, cancelled, late (answered after cancellation) or unanswered
rpc.reason	cancellations	timeout when the client gave up waiting
rpc.callId	tools/call requests and what answered them	The tool call (tool.call data.id) the message belongs to
durationMs	responses	Time since the request was sent
parentId	agent.event	Event id of the AG-UI step (graph node) that emitted it

Payloads larger than 200 KB (e.g. base64 images) are truncated in the live stream to keep the UI fast.