Base URL
Create Event
string
required
ID of the parent session.
string
required
"tool_call", "llm_decision", "state_change", or "error".string
Name of the tool called (for
tool_call events).object
Input passed to the tool.
object
Output returned by the tool.
string
Agent’s reasoning for this action.
array
Other options the agent considered.
number
Confidence score (0.0 to 1.0).
number
Cost for this event in USD.
Request
Response
Event Types
tool_call
Track when your agent calls a tool.llm_decision
Track agent decision points.cURL Examples
Tool Call Event
Decision Event
Error Codes
Next Steps
Sessions API
Create and manage sessions.
LangChain Integration
Automatic event tracking.

