BTC Mempool & Fees Pulse

Keyless Bitcoin mempool + fees monitor (mempool.space, no API key): mempool depth (tx count, vsize, total fee), fee tiers, recent block cadence, 60m hashrate. Stateful KVS: repeat runs report mempool drift + fee-tier shifts; alerts on fee-spike / mempool-surge / hashrate-dip.

What you get

Every run writes a dataset with one row per record:

{
  "kind": "mempool-pulse",
  "ts": "2026-09-19T00:26:01Z",
  "firstRun": true,
  "prevRunTs": null,
  "tipHeight": 967633,
  "mempool": {
    "count": 81437,
    "vsizeMb": 40.988,
    "totalFeeSats": 8550306,
    "avgVsatPerVb": 0.21,
    "feeHistogramTop5": [
      [
        5.172131,
        50655
      ],
      [
        4.00652,
        50993
      ],
      [
        3.1523743,
        50255
      ],
      [
        2.9910111,
        50322
      ],
      [
        2.357798,
        50510
      ]
    ]
  },
  "feeTiers": {
    "fastestFee": 2,
    "halfHourFee": 1,
    "hourFee": 1,
    "economyFee": 1,
    "minimumFee": 1
  },
  "blocksRecent": [
    {
      "height": 967633,
      "ts": 1789776438,
      "gapSecFromPrev": 474
    },
    {
      "height": 967632,
      "ts": 1789775964,
      "gapSecFromPrev": 245
    },
    {
      "height": 967631,
      "ts": 1789775719,
      "gapSecFromPrev": 75
    },
    {
      "height": 967630,
      "ts": 1789775644,
      "gapSecFromPrev": 882
    },
    {
      "height": 967629,
      "ts": 1789774762,
      "gapSecFromPrev": 178
    },
    {
      "height": 967628,
      "ts": 1789774584,
      "gapSecFromPrev": 997
    },

Input

{
  "limit": 20
}

Field	Type	Description
limit	integer	Limit: the limit parameter. Default: 20.

Use cases

• Monitor on a schedule — run this Actor on a timer and get a fresh, normalized snapshot every time; diff the datasets to see what changed.
• Feed a dashboard or model — clean, one-JSON-item-per-record output is ready to pipe into a spreadsheet, database, or LLM prompt without any post-processing.
• Research & due diligence — pull a structured set of records for a topic, name, or window without scraping the public source by hand.

Limits & notes

• No API key, no login: it only reads public endpoints/feeds. If the upstream source is degraded, the run still succeeds and returns an honest status item instead of failing.
• Results reflect what the public source returned at run time (top-N windows, newest-first where applicable).
• Pay-per-event via synthetic events: each default-dataset item is billed through apify-default-dataset-item ($0.001 per item), plus apify-actor-start.
• Free to try on the free plan; PPE pricing applies to paid-plan users.

Categories

OTHER