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They do not exist yet. They are the next transaction blocks the way the network is likely to fill them: every pending spend bundle, sorted by the fee it pays per unit of cost, packed into blocks of 11 billion cost. The block right next to the line is the next one; the ones further left come after. Each shows the typical fee rate inside, the fee range, the total fees, how many spend bundles it holds and roughly when it will be farmed. Click one to see what is in it.

The transaction blocks that were just confirmed, newest first, with their fees, reward claims, age and the farmer who won them. Chia farms a block about every 19 seconds but only every third one carries transactions; the small +N markers count the empty ones in between.

Chia is not Bitcoin. Fees are paid per unit of CLVM cost, and the mempool accepts spends with no fee at all as long as it has room. The capacity bar shows how full it is (ten blocks worth of cost). When it fills up, paying a fee moves you ahead of the 0-fee backlog, and the cards show the rate that gets you into the next block, in five minutes or in ten.

The composition of the block about to be farmed: one cell per spend bundle, sized by its cost, coloured by its fee band, outlined by asset kind. Use the chips to spotlight XCH, CAT, NFT, offer or DID spends. Hover a cell for details, click to open the transaction.

How much cost is waiting, split by fee band, over the last two hours. It is sampled by your browser while the page is open, so it starts when you first opened the app.

A transaction (spend bundle) id, a block height or header hash, an xch or txch address, a coin id, a CAT asset id, an nft1 id or a did:chia: id. Press / anywhere to jump to the box. If a 64-character hex id could be several things, the app checks the mempool, transactions, coins and blocks and shows you the candidates.

Paste its id or your address. A pending transaction shows which projected block it sits in and an estimated time; once confirmed it shows the block, confirmations and what moved between which addresses. The address page lists your pending transactions at the top and refreshes on its own.

The classification comes from Coinset's coin details, which are not always available. Plain XCH coins rarely need one; CAT and NFT coins still link to their asset pages from the transaction view.

In Sage 0.13 or newer open Apps → Install from URL and paste https://mempoolxch.space. Sage downloads and verifies the app; from then on it follows your wallet's network and theme, and a My wallet entry opens your own address page once you allow it to read your receive address.

Inside Sage the app always shows the network your wallet is on.

Everything that is yours comes from the wallet itself: balance, sync state, pending and past transactions, your coins, whether an address is yours, and the XCH price. Sage is a light wallet, and its app bridge offers no node queries (no peak, mempool or block lookups), so the mempool, blocks and other people's addresses still come from the chain endpoint in Settings, Coinset by default or a node you whitelist.

No. By default everything comes from Coinset's public Chia full node and its index, which also powers the live updates, address history and CAT/NFT pages.

Settings → Full-node RPC endpoints accepts any Chia full-node RPC over HTTPS. A stock node listens on https://localhost:8555 with client-certificate TLS and no CORS headers, which a browser cannot talk to directly, so put a small proxy in front of it:

The app polls instead of streaming and fetches the raw mempool itself. Coinset-only features (semantic transaction summaries, address history, CAT and NFT history) are hidden with a note. Everything block, coin and mempool related keeps working.