Mempool
FreemiumLiveLast verified 24 Sept 2026
Live Bitcoin mempool, fee estimates, block, address and Lightning Network data.
Example request
curl -s 'https://mempool.space/api/v1/fees/recommended'
Free tier, in plain English
Free and keyless for normal use, throttled with 429s if you exceed an unpublished rate limit; enterprise sponsors get higher limits.
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