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Llm Analytics

Get Trace Detail

GET
/v0/projects/{idOrSlug}/llm/traces/{traceId}/spans/{spanId}

Authorization

apiKeyAuth
headerx-api-key<token>

FastStats API key. Pass it in the x-api-key header or as a Bearer token in the Authorization header.

Path Parameters

idOrSlug*string
traceId*string
spanId*string

Response Body

Success

application/json
  1. response
traceId*string
spanId*string
parentSpanId*string|null
timestamp*string
startTime*string
endTime*string|null
source*string
model*string|null
providerName*string|null
providerSlug*string|null
status*string
level*string
finishReason*string|null
durationMs*number||null
promptTokens*number|
completionTokens*number|
totalTokens*number|
cachedTokens*number|
reasoningTokens*number|
inputCost*number|
outputCost*number|
totalCost*number|
userId*string|null
sessionId*string|null
apiKeyName*string|null
operationName*string
spanType*string
spanKind*string
input*string|null
output*string|null
metadata*string|null
modelParameters*string|null
attributes*string|null
tags*array<string>
identifiedUser*|null
Example Request
curl -X GET 'https://api.faststats.dev/v0/projects/string/llm/traces/string/spans/string'
Example Response
{  "traceId": "string",  "spanId": "string",  "parentSpanId": "string",  "timestamp": "string",  "startTime": "string",  "endTime": "string",  "source": "string",  "model": "string",  "providerName": "string",  "providerSlug": "string",  "status": "string",  "level": "string",  "finishReason": "string",  "durationMs": 0,  "promptTokens": 0,  "completionTokens": 0,  "totalTokens": 0,  "cachedTokens": 0,  "reasoningTokens": 0,  "inputCost": 0,  "outputCost": 0,  "totalCost": 0,  "userId": "string",  "sessionId": "string",  "apiKeyName": "string",  "operationName": "string",  "spanType": "string",  "spanKind": "string",  "input": "string",  "output": "string",  "metadata": "string",  "modelParameters": "string",  "attributes": "string",  "tags": [    "string"  ],  "identifiedUser": {    "userId": "string",    "userKey": "string",    "externalId": "string",    "email": "string",    "name": "string",    "avatarUrl": "string"  }}