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GET
/
api
/
v2
/
costs
/
by-association-property
Get costs by property
curl --request GET \
  --url https://api.traceloop.com/api/v2/costs/by-association-property \
  --header 'Authorization: Bearer <token>'
{
  "property_name": "<string>",
  "values": [
    {}
  ],
  "total_cost": 123
}
Query your LLM costs broken down by a specific association property. This helps you understand how costs are distributed across different values of a property (e.g., by user_id, session_id, or any other association property you track).

​
Request Parameters

​
property_name
string
required
The name of the association property to group costs by (e.g., “user_id”, “session_id”).
​
start_time
string
required
The start time in ISO 8601 format (e.g., “2025-04-15T00:00:00Z”).
​
end_time
string
required
The end time in ISO 8601 format (e.g., “2025-04-28T23:00:00Z”).
​
env
string
List of environments to include in the calculation. Separated by comma.
​
selected_token_types
string
NEW Filter costs by specific token types. Separate multiple types with commas.Supported token types:
  • input_tokens or prompt_tokens (automatically normalized to prompt_tokens)
  • output_tokens or completion_tokens (automatically normalized to completion_tokens)
  • cache_read_input_tokens
  • cache_creation_input_tokens
  • Other token types as they appear in your data
Note: total_tokens cannot be used as a filter.Examples:
  • selected_token_types=input_tokens,output_tokens
  • selected_token_types=prompt_tokens,cache_read_input_tokens
  • selected_token_types=completion_tokens
When this parameter is omitted, costs for all token types are included.

​
Response

​
property_name
string
The name of the property that was queried.
​
values
PropertyValue[]
A list of property values and their associated costs.
​
total_cost
number
The total cost across all property values.
{
  "property_name": "session_id",
  "values": [
    {
      "value": "session_21",
      "cost": 1.23
    },
    {
      "value": "session_5",
      "cost": 4.56
    },
    {
      "value": "No_Value",
      "cost": 0.78
    }
  ],
  "total_cost": 6.57
}
The API can return special values:
  • "No_Association" as property_name if no spans have the requested association properties
  • "No_Value" as a value for spans that don’t have a value for the specified property
  • "Unknown_Value" for spans where the property exists but has an empty value
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