Query Thread Traces - Docs by LangChain

Error

A valid request URL is required to generate request examples

{
  "items": [
    {
      "completion_cost": 123,
      "completion_cost_details": {
        "raw": {}
      },
      "completion_token_details": {
        "raw": {}
      },
      "completion_tokens": 123,
      "end_time": "2025-01-15T12:00:01.500Z",
      "error": "context deadline exceeded",
      "error_preview": "<string>",
      "first_token_time": "2024-01-15T10:30:00.312Z",
      "inputs": {},
      "inputs_preview": "<string>",
      "latency": 123,
      "name": "<string>",
      "op": 123,
      "outputs": {},
      "outputs_preview": "<string>",
      "prompt_cost": 123,
      "prompt_cost_details": {
        "raw": {}
      },
      "prompt_token_details": {
        "raw": {}
      },
      "prompt_tokens": 123,
      "start_time": "2025-01-15T12:00:00.000Z",
      "thread_id": "d4e5f6a7-b8c9-4d5e-1f2a-3b4c5d6e7f8a",
      "total_cost": 123,
      "total_tokens": 123,
      "trace_id": "018e4c7e-a9fb-7ef0-a5b6-6ea3a82e9327"
    }
  ],
  "next_cursor": "eyJydW5zX2N1cnNvciI6Imx0KGN1cnNvciwiLi4uIikifQ=="
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

GET

threads

{thread_id}

traces

Error

A valid request URL is required to generate request examples

{
  "items": [
    {
      "completion_cost": 123,
      "completion_cost_details": {
        "raw": {}
      },
      "completion_token_details": {
        "raw": {}
      },
      "completion_tokens": 123,
      "end_time": "2025-01-15T12:00:01.500Z",
      "error": "context deadline exceeded",
      "error_preview": "<string>",
      "first_token_time": "2024-01-15T10:30:00.312Z",
      "inputs": {},
      "inputs_preview": "<string>",
      "latency": 123,
      "name": "<string>",
      "op": 123,
      "outputs": {},
      "outputs_preview": "<string>",
      "prompt_cost": 123,
      "prompt_cost_details": {
        "raw": {}
      },
      "prompt_token_details": {
        "raw": {}
      },
      "prompt_tokens": 123,
      "start_time": "2025-01-15T12:00:00.000Z",
      "thread_id": "d4e5f6a7-b8c9-4d5e-1f2a-3b4c5d6e7f8a",
      "total_cost": 123,
      "total_tokens": 123,
      "trace_id": "018e4c7e-a9fb-7ef0-a5b6-6ea3a82e9327"
    }
  ],
  "next_cursor": "eyJydW5zX2N1cnNvciI6Imx0KGN1cnNvciwiLi4uIikifQ=="
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

{
  "detail": "<string>",
  "instance": "<string>",
  "remedy": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "<string>"
}

Authorizations

X-API-Key

string

header

required

X-Tenant-Id

string

header

required

Path Parameters

thread_id

string

required

Thread ID

Query Parameters

cursor

string

cursor is the opaque string from a previous response's next_cursor. Omit on the first request; pass the returned cursor to fetch the next page.

filter

string

filter narrows which traces are returned for this thread, using a LangSmith filter expression evaluated against each root trace run. For example: eq(status, "success") or has(tags, "production"). See https://docs.langchain.com/langsmith/trace-query-syntax#filter-query-language for syntax.

page_size

integer

default:20

page_size is the maximum number of traces to return in this response. Defaults to 20 when omitted; must be between 1 and 100 inclusive when set.

Required range: 1 <= x <= 100

project_id

string<uuid>

required

project_id is the tracing project UUID (required).

selects

enum<string>[]

selects lists which properties to include on each returned trace (repeatable query parameter). Accepts any value of the ThreadTraceSelectField enum. Properties not listed are omitted from each trace object; trace_id is always returned.

Available options:

THREAD_ID,

TRACE_ID,

OP,

PROMPT_TOKENS,

COMPLETION_TOKENS,

TOTAL_TOKENS,

START_TIME,

END_TIME,

LATENCY,

FIRST_TOKEN_TIME,

INPUTS_PREVIEW,

OUTPUTS_PREVIEW,

INPUTS,

OUTPUTS,

ERROR,

PROMPT_COST,

COMPLETION_COST,

TOTAL_COST,

PROMPT_TOKEN_DETAILS,

COMPLETION_TOKEN_DETAILS,

PROMPT_COST_DETAILS,

COMPLETION_COST_DETAILS,

NAME,

ERROR_PREVIEW

Response

items and pagination

items

object[]

items is the page of root traces in this thread. Which properties are populated on each trace depends on the selects query parameter.

Show child attributes

next_cursor

string

next_cursor is the opaque cursor to pass as cursor on the next request. Null on the final page.

Example:

"eyJydW5zX2N1cnNvciI6Imx0KGN1cnNvciwiLi4uIikifQ=="

Query Single Thread Stats

Query traces