curl --request GET \
  --url https://api.paygentic.io/v0/sources/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "src_v7w8x9y0z1a2b3c4",
  "config": {
    "ampersandProjectId": "proj_789012"
  },
  "createdAt": "2024-02-15T10:30:00Z",
  "description": "Language model token consumption monitoring",
  "enabled": true,
  "metadata": {
    "billableMetricMapping": {
      "revenue": "bm_l3m4n5o6p7q8r9s0"
    }
  },
  "name": "LLM Usage Tracker",
  "planId": "plan_d5e6f7g8h9i0j1k2",
  "processingMode": "manual",
  "type": "stripe_revenue",
  "updatedAt": "2024-03-01T14:20:00Z"
}