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Pending block

GET 
/api/chain/pending

Returns the pending block via eth_getBlockByNumber("pending"). Where a public mempool exists (ethereum, sepolia) these are transactions broadcast but not yet mined, useful for watching unconfirmed activity or front-running risk. Single-sequencer networks have no public pending pool, so the call reports roughly the next block rather than a queue. An empty result there means the concept does not apply, not that the chain is idle; check the mempool field from /api/chain/network-info.

Request​

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Successful response