txpool_inspect

txpool_inspect returns a human-readable text summary of every transaction sitting in a Polygon PoS node's transaction pool, split into pending and queued and organised by sender address and nonce. Each entry condenses a transaction into a short string showing recipient, MATIC value, gas, and gas price — handy for eyeballing mempool state without parsing full transaction objects. On Polygon, where low fees and ~2-second blocks keep the mempool churning, it is a quick way to see what is in flight. Send the request to the Polygon mainnet endpoint at https://polygon.therpc.io/YOUR_API_KEY (chain ID 137, 0x89).

Use cases

• Debug a stuck Polygon transaction by locating it under its sender address and nonce to see its pending gas price and decide whether to replace it with a higher fee.
• Audit the mempool contents during Polygon congestion incidents — such as a popular Polymarket resolution or an NFT mint — to understand what is backing up the queue.

Parameters

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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": "txpool_inspect",
7    "params": [],
8    "id": 1
9  }'

Try it live in the Polygon playground.

Errors & troubleshooting

Common pitfalls

• The txpool namespace is a Geth-family feature. Since Polygon's Bor client is Geth-based it is usually available, but not every node or managed endpoint exposes it, so handle a "method not found" response.
• The text format is meant for human reading, not machine parsing. For programmatic access to full transaction objects use txpool_content instead.
• During heavy Polygon mempool activity the response can grow very large. When you only need totals, reach for txpool_status, which returns lightweight pending and queued counts.

Supported networks

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

See also

• txpool_status

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":"txpool_inspect","params":[]}'