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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 .
ProtocolProtocol availabilityChainstack availabilityClient configurationExample
EthereumAvailable to everyoneArchive with Debug and trace APIs4096 pending transactionsEthereum txpool_content
PolygonAvailable to everyoneArchive with Debug and trace APIs4096 pending transactionsPolygon txpool_content
BNB Smart ChainAvailable to everyoneArchive with Debug and trace APIs4096 pending transactionsBSC txpool_content
BasePrivate to Sequencer.N/AN/AN/A
AvalancheAvailable only to validators.Not available on ChainstackN/AN/A
TONExternal messages are available in mempoolAvailable
ArbitrumNo mempool. Only Sequencer FIFO.N/AN/AN/A
zkSync EraSequencer onlyN/AN/AN/A
Polygon zkEVMSequencer onlyN/AN/AN/A
OptimismPrivate to SequencerN/AN/AN/A
Oasis SaphireConfidential mempoolN/AN/AN/A
NEARNo mempoolN/AN/AN/A
AuroraNo mempoolN/AN/AN/A
SolanaNo mempoolN/AN/AN/A
ScrollPublicly available through Sequencer.N/AN/AN/A
RoninAvailable to everyoneNot available on ChainstackN/AN/A
AptosAvailable to everyone but there is no transaction streamFull or archive node deploymentN/AN/A
Gnosis ChainAvailable to everyoneOn a dedicated node.Any configurationGnosis txpool_content
CronosNo mempool. Only Sequencer FIFO.N/AN/AN/A
FilecoinAvailable to everyoneFull node deployment20,000 pending messagesFilecoin MpoolPending
SonicAvailable to everyoneOn a dedicated node4096 pending transactionstxpool_*
FantomAvailable to everyoneOn a dedicated node4096 pending transactionstxpool_*
TRONAvailable to everyoneOn a dedicated node4096 pending transactionstxpool_*
StarknetPrivate to SequencerN/AN/AN/A
TezosAvailable to everyoneFull or archive node deployment240 blocksTezos pending_operations
BitcoinAvailable to everyoneFull node deploymentmempool size: 300 MB mempool tx expiry: 336 hours (14 days)Bitcoin getrawmempool

​
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
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Ake

Director of Developer Experience @ Chainstack Talk to me all things Web320 years in technology | 8+ years in Web3 full time years experienceTrusted advisor helping developers navigate the complexities of blockchain infrastructure