Get costs by property

GET /v2/costs/by-association-property

Get costs by property

cURL

curl --request GET \
  --url https://api.traceloop.com/v2/costs/by-association-property \
  --header 'Authorization: Bearer <token>'

200

{
  "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