eth_uninstallFilter

eth_uninstallFilter removes a server-side filter you previously created on a Polygon PoS node — whether a log filter, a block filter, or a pending-transaction filter — and frees the resources the node was holding to track it. Each filter consumes memory and is polled with eth_getFilterChanges; calling this method when you are done is the clean way to release that state. On a busy MATIC-fee network where many integrations watch contract logs, releasing idle filters keeps your node footprint small. Send the request to the Polygon mainnet endpoint at https://polygon.therpc.io/YOUR_API_KEY (chain ID 137, 0x89).

Use cases

• Clean up a log filter after a monitoring session ends — for example once you finish tracking Transfer events on the Polygon USDT contract 0xc2132D05D31c914a87C6611C10748AEb04B58e8F — to release node resources.
• Cancel every active filter on application shutdown so your Polygon integration leaves no dangling server-side state behind.

Parameters

Response

Example request

1curl https://polygon.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "eth_uninstallFilter",
7    "params": ["0x1"],
8    "id": 1
9  }'

Try it live in the Polygon playground.

Errors & troubleshooting

Common pitfalls

• A false return is not an error — it just means the filter ID was not found, usually because it had already expired naturally. Treat it as a no-op rather than a failure.
• Polygon nodes auto-expire filters after roughly 5 minutes of inactivity (no eth_getFilterChanges polling), but relying on that timeout is fragile; calling eth_uninstallFilter explicitly when you are done is the better practice.

Supported networks

• Mainnet — Chain ID: 137
• Amoy — Chain ID: 80002

See also

• eth_newFilter
• eth_newBlockFilter
• eth_newPendingTransactionFilter
• eth_getFilterChanges

1curl https://polygon.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"eth_uninstallFilter","params":["0x1"]}'