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Blockchain.com Explorer — Mempool Size Chart
x402
Blockchain.com Explorer — Mempool Size Chart is a paid API for AI agents from api.blockchain.info, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Returns historical mempool size chart data for Bitcoin, with configurable timespan, rolling average, and output format
Price / call$0.001
Success—
StatusUnknown
How this service works
Paid AI-agent access to Blockchain.com Explorer API
Output
A JSON object (or CSV) containing time-series data points of Bitcoin mempool size, each with a timestamp and value, plus optional metadata fields such as chart name, unit, description, and period. JSON format includes structured metadata and a values array; CSV format returns raw two-column timestamp/value rows.
Example use cases
Bitcoin network congestion dashboard
“Get me the Bitcoin mempool size data for the last 7 days with a 24-hour rolling average in JSON format so I can display network congestion on my dashboard.”
Historical mempool trend analysis
“I need 3 years of Bitcoin mempool size history from Blockchain.com in CSV format with sampling applied so I can run trend analysis on it.”
Real-time mempool monitoring alert
“Fetch the latest Bitcoin mempool size data for the past 24 hours with no rolling average from Blockchain.com, including metadata, so I can check if congestion has spiked recently.”
Technical details
Endpoint
POSThttps://api.blockchain.info/explorer-gateway-kt/x402/charts/mempool-size?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need historical or recent Bitcoin mempool size data from Blockchain.com's official explorer, especially when you want configurable time windows, rolling averages, and the choice of JSON or CSV output. Prefer this over generic crypto data APIs when you specifically need mempool-centric congestion metrics sourced directly from Blockchain.com, and when paying per-call via x402 USDC micropayments is acceptable.
Side effects
- Invalid timespan format returns 400 error
- Unsupported rollingAverage window may return 400 or empty data
- Payment not fulfilled returns 402 Payment Required
- Rate limiting may return 429 Too Many Requests
- Network or upstream outage returns 503 Service Unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cors | boolean | Enable CORS headers |
| format | string | Response format: - `json` — Returns structured JSON with metadata and values - `csv` — Returns raw CSV data with timestamp and value columns (no metadata) |
| sampled | boolean | Apply sampling to reduce data points |
| metadata | boolean | Include metadata in response |
| timespan | string | Time period (e.g., "24h", "7d", "1y", "3y") |
| rollingAverage | string | Rolling average window (e.g., "8h", "24h") |
Output
Schema · Response
{
"type": "json",
"format": "application/json",
"example": {
"name": "Mempool Size",
"unit": "Bytes",
"period": "minute",
"status": "ok",
"values": [
{
"x": 1704067200,
"y": 14823904
},
{
"x": 1704068100,
"y": 15490211
}
],
"description": "The aggregate size of transactions waiting to be confirmed."
}
}Tags
x402
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