debug_traceCall

Executes an eth_call-style message without mining it and returns a full execution trace — opcodes, stack, memory, and gas step by step. It is the standard tool for debugging why a call reverts and for profiling exactly where gas goes.

Part of the debug namespace, which node operators frequently gate or disable for cost reasons — support varies widely between chains and providers, which is exactly why we probe it weekly instead of listing it as a maybe.

Example request

curl -s https://rpc.swiftnodes.io/rpc/eth?key=YOUR_API_KEY \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"debug_traceCall","params":[{"from":"0x0000000000000000000000000000000000000000","to":"0x0000000000000000000000000000000000000001"},"latest"]}'

Replace YOUR_API_KEY with your SwiftNodes key (free tier available).

Chain support — 98/107 chains

Auto-probed 2026-10-11 through the real customer path (auth, routing, failover). ✓ served · ± served by some upstreams of that chain · ✗ unavailable. Full matrix: method support.