Causal Graph API

Use the Causal Graph API to retrieve nodes and edges for an incident.

Query by transaction

GET /api/causal-graph?transaction_id=pay_123

Response shape

{
  "nodes": [
    {
      "id": "evt_block_1",
      "type": "kernel_event",
      "label": "block_io",
      "service_name": "ledger-service"
    }
  ],
  "edges": [
    {
      "from": "evt_block_1",
      "to": "evt_write_1",
      "cause_type": "DISK_TO_SYSCALL",
      "latency_ns": 842000000
    }
  ]
}

Use cases

• render the graph view
• embed kprobe explanations in internal incident tools
• attach root-cause evidence to postmortems
• compare causal paths across incidents