trace_block on Blast

Measured 2026-10-04 by our weekly probe, which calls trace_block through the same Blast endpoint customers use.

What trace_block does

Returns Parity-style traces for every transaction in a block: internal calls, contract creations and value transfers. Indexers use it to reconstruct internal ETH movements that receipts do not show.

What to use instead on Blast

Blast did not serve the trace_* namespace in our probe, which is common on OP Stack and zk chains. The debug_* namespace works on Blast: use debug_traceBlockByNumber with the callTracer for the same internal-call data.

Example request

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

import { createPublicClient, http } from "viem";

const client = createPublicClient({ transport: http("https://rpc.swiftnodes.io/rpc/blast?key=YOUR_API_KEY") });

// Any JSON-RPC method, typed loosely: trace_block on Blast
const result = await client.request({
  method: "trace_block",
  params: ["latest"],
});

Other methods on Blast

• eth_getLogsSupported
• eth_getBlockReceiptsSupported
• eth_feeHistorySupported
• eth_getProofSupported
• eth_createAccessListSupported
• debug_traceCallSupported
• trace_transactionNot available

trace_block on other chains

Support differs by chain; the full measured table is on the trace_block reference.

• Ethereum
• Base
• Arbitrum
• Optimism
• Polygon
• BNB Smart Chain
• Avalanche
• Sonic
• Linea
• Scroll
• zkSync Era
• Mantle
• Gnosis
• Celo
• Berachain
• Monad
• Unichain
• Kaia
• PulseChain

Frequently asked questions