Bitcoin Lab API

Transaction_size_min

Tech spec

Field Value
API name (slug) txsize_min
Group fees
Unit / Valuetype bytes / other
Shape scalar
Resolutions block, h1, h4, h8, h12, d1
Endpoints /v2/fees
Tier 0
Last updated 2025-12-16 19:49 UTC
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Brief Description: The minimum size, in bytes, of Bitcoin transactions.

Transaction_size_min measures the smallest transaction size processed on the Bitcoin network each day, providing insights into network efficiency and transaction patterns.

Advanced Explanation The minimum transaction size, referred to here as Transaction_size_min, is measured in bytes and reflects the aggregate data load that transactions impose on the network. Given the finite space in each block, Transaction_size_min offers a panorama of network efficiency and scalability at any given point.

Aggregation logic: Minimum of the block-level minimum transaction size in the period (smallest transaction included in the period).

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