Python
import requests
url = "https://app.langwatch.ai/api/traces/{traceId}"
headers = {"X-Auth-Token": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'X-Auth-Token': '<api-key>'}};
fetch('https://app.langwatch.ai/api/traces/{traceId}', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));curl --request GET \
--url https://app.langwatch.ai/api/traces/{traceId} \
--header 'X-Auth-Token: <api-key>'{}{
"error": "<string>",
"message": "<string>"
}{
"error": "<string>",
"message": "<string>"
}{
"message": "<string>"
}{
"message": "<string>",
"candidateTraceIds": [
"<string>"
]
}{
"error": "<string>",
"message": "<string>"
}{
"error": "<string>",
"message": "<string>"
}Traces
Get trace details
Get a single trace by ID.
GET
/
api
/
traces
/
{traceId}
Python
import requests
url = "https://app.langwatch.ai/api/traces/{traceId}"
headers = {"X-Auth-Token": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'X-Auth-Token': '<api-key>'}};
fetch('https://app.langwatch.ai/api/traces/{traceId}', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));curl --request GET \
--url https://app.langwatch.ai/api/traces/{traceId} \
--header 'X-Auth-Token: <api-key>'{}{
"error": "<string>",
"message": "<string>"
}{
"error": "<string>",
"message": "<string>"
}{
"message": "<string>"
}{
"message": "<string>",
"candidateTraceIds": [
"<string>"
]
}{
"error": "<string>",
"message": "<string>"
}{
"error": "<string>",
"message": "<string>"
}Authorizations
Project API key for sending traces and accessing project-scoped resources. Format: sk-lw-... (no underscore). Obtain one by creating a project via the Admin API or the LangWatch UI.
Path Parameters
The trace ID — either the full 32-char ID or a unique prefix (≥ 8 chars). Prefix lookup is scoped to the authenticated project.
Query Parameters
Output format: 'digest' (default, AI-readable) or 'json' (full raw data)
Available options:
digest, json Deprecated: use format=digest instead
Available options:
true, false, 1, 0 Response
Trace detail with spans, evaluations, and ASCII tree
The response is of type object.
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