# Costs
> Track token costs per session and execution

## List Session Costs Endpoint

`GET /costs/sessions`

List session costs with optional filtering.

**Parameters:**
- `execution_id` (query): string
- `limit` (query): integer


## Get Session Cost Endpoint

`GET /costs/sessions/{session_id}`

Get cost for a specific session.

**Parameters:**
- `session_id` (path) (required): string
- `include_breakdown` (query): boolean

**Response (200):** `SessionCostResponse`

## List Execution Costs Endpoint

`GET /costs/executions`

List execution costs.

**Parameters:**
- `limit` (query): integer


## Get Execution Cost Endpoint

`GET /costs/executions/{execution_id}`

Get aggregated cost for a workflow execution.

**Parameters:**
- `execution_id` (path) (required): string
- `include_breakdown` (query): boolean
- `include_session_ids` (query): boolean

**Response (200):** `ExecutionCostResponse`

## Get Cost Summary Endpoint

`GET /costs/summary`

Get summary of all costs across sessions and executions.

**Response (200):** `syn_api__routes__costs__CostSummaryResponse`