LangSmith

Use LangSmith to record workflow, tool, or model runs with inputs, outputs, tags, metadata, and parent-child relationships. Create or update runs, retrieve a run, and attach feedback using the actions below.

Use the block

Send run data to LangSmith to trace executions, attach metadata, and monitor workflow performance.

Actions

LangSmith Create Run

Forward a single run to LangSmith for ingestion.

Inputs and outputs

Input

Parameter	Type	Required	Description
apiKey	string	Yes	LangSmith API key
id	string	No	Unique run identifier
name	string	Yes	Run name
run_type	string	Yes	Run type (tool, chain, llm, retriever, embedding, prompt, parser)
start_time	string	No	Run start time in ISO-8601 format
end_time	string	No	Run end time in ISO-8601 format
inputs	json	No	Inputs payload
run_outputs	json	No	Outputs payload
extra	json	No	Additional metadata (extra)
tags	json	No	Array of tag strings
parent_run_id	string	No	Parent run ID
trace_id	string	No	Trace ID
session_id	string	No	Session ID
session_name	string	No	Session name
status	string	No	Run status
error	string	No	Error details
dotted_order	string	No	Dotted order string
events	json	No	Structured events array

Output

Parameter	Type	Description
accepted	boolean	Whether the run was accepted for ingestion
runId	string	Run identifier provided in the request
message	string	Response message from LangSmith

LangSmith Create Runs Batch

Forward multiple runs to LangSmith in a single batch.

Input

Output

LangSmith Update Run

Patch an existing LangSmith run with outputs, status, or timing once it completes.

Input

Output

No output fields are documented for this action.

LangSmith Get Run

Retrieve a single LangSmith run by ID.

Input

Output

LangSmith Create Feedback

Attach a score, correction, or comment to a LangSmith run.

Input

Output