trace_filter

trace_filter searches across a range of Avalanche C-Chain blocks for traces that match criteria you supply — sender or receiver address, a fromBlock/toBlock window, and pagination via after and count. The C-Chain is Avalanche's EVM chain, where AVAX is the gas token and Snowman consensus finalizes blocks in roughly one to two seconds, so a single day already spans tens of thousands of blocks. Rather than tracing one transaction or one block at a time, this method scans the whole window and returns every matching call/create/suicide action. Send the request to https://avalanche.therpc.io/YOUR_API_KEY (chain ID 43114, hex 0xa86a).

Use cases

• Find every internal AVAX transfer sent to a contract across a range of C-Chain blocks, including transfers that emit no event.
• Detect MEV bot activity on Avalanche by filtering traces originating from known bot addresses.
• Build an indexer for every call to a specific DeFi protocol such as Trader Joe, Aave, or GMX.
• Run forensic analysis of all interactions with a C-Chain contract in the blocks before and after an exploit.

Parameters

Response

Example request

1curl https://avalanche.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "trace_filter",
7    "params": [{}],
8    "id": 1
9  }'

Try it live in the Avalanche playground.

Errors & troubleshooting

Common pitfalls

• Wide block windows are extremely slow and may be rejected outright; because the C-Chain mints a block every second or two, even a few hours covers thousands of blocks — narrow the range and paginate with after/count.
• It requires a trace-enabled archive node; most public Avalanche endpoints do not expose the trace namespace at all.
• Unlike eth_getLogs, traces are not indexed by topic — only by address and block number — so you cannot filter on event signatures here.

Supported networks

• Mainnet — Chain ID: 43114
• Fuji

See also

• trace_transaction
• trace_block
• trace_call
• trace_replayTransaction

1curl https://avalanche.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"trace_filter","params":[null]}'