Mempool, also known as the memory pool, transaction pool or txpool, is a dynamic, in-memory space for transactions awaiting block inclusion. Rather than a single, unified pool, each node maintains its own transaction pool, collectively constituting the global memory. This constantly changing dataset, containing thousands of pending transactions, represents millions of dollars in flux at any given moment.

Mempool configurations vary wildly across different protocols & node client configurations.

The table here is a maintained reference of mempool configurations & specifics across all the protocols that Chainstack supports.

The table structure:

• Protocol — protocol name.
• Protocol availability — details of the mempool availability on the protocol level.
• Chainstack availability — how to access the protocol's mempool on Chainstack.
• Client configuration — the default node client configuration for the mempool as deployed at Chainstack.
• Example — a simple curl example. Remember to replace YOUR_CHAINSTACK_NODE with your Chainstack node endpoint for that particular protocol.

Remember that whatever the default configuration, we can always customize it for you on a dedicated node 💙🛠️.

Ethereum txpool_content

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
     YOUR_CHAINSTACK_NODE

Polygon txpool_content

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
     YOUR_CHAINSTACK_NODE

BSC txpool_content

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
     YOUR_CHAINSTACK_NODE

Gnosis txpool_content

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
     YOUR_CHAINSTACK_NODE

Filecoin MpoolPending

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{ "jsonrpc": "2.0", "method": "Filecoin.MpoolPending", "params": [null], "id": 1 }' \
     YOUR_CHAINSTACK_NODE

Fantom txpool_content

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":1}' \
     YOUR_CHAINSTACK_NODE

Tezos pending_operations

curl -X GET "YOUR_CHAINSTACK_NODE/chains/main/mempool/pending_operations"

Bitcoin getrawmempool

curl -X POST \
     -H "Content-Type: application/json" \
     --data '{"jsonrpc": "2.0", "id":"curltest", "method": "getrawmempool", "params": [] }' \
     YOUR_CHAINSTACK_NODE