Skill is based on mempool (mempool.space) backend and frontend API surface, generated at 2026-02-24.
Mempool is the open-source mempool visualizer, block explorer, and API service behind mempool.space. It provides REST and WebSocket APIs for fees, blocks, transactions, addresses (with Electrum/Esplora), mining pools and hashrate, optional Lightning explorer, and Liquid assets. Use this skill when building agents or tools that query or stream Bitcoin/Liquid chain and mempool data.
Core References
| Topic |
Description |
Reference |
| REST API overview |
Base URL, prefix /api/v1/, main endpoint groups |
core-rest-api |
| WebSocket |
Live blocks, mempool-blocks, stats, want/track actions |
core-websocket |
| Configuration |
mempool-config.json, env overrides, backend behavior |
core-configuration |
Features
Fees and Mempool
| Topic |
Description |
Reference |
| Fees and mempool state |
Recommended/precise fees, mempool blocks, transaction times, CPFP |
features-fees-mempool |
Blocks and Transactions
| Topic |
Description |
Reference |
| Blocks and transactions |
Block list/hash/txids/txs, tx status/outspends, push tx, RBF |
features-blocks-transactions |
Addresses
| Topic |
Description |
Reference |
| Addresses and scripthash |
Address stats, txs, UTXO, validation (Electrum/Esplora) |
features-addresses |
Liquid and Lightning
Services
Best Practices
| Topic |
Description |
Reference |
| API usage |
Network selection, init-data vs WebSocket, pagination, 503 handling |
best-practices-api-usage |