No approved customer reviews of 402 Index have been published yet. Read reviews of other Bitcoin financial services in the 21Rates review directory.
A protocol-agnostic directory of paid APIs for agents and applications, helping developers discover services that can be paid for with Lightning, crypto, or traditional rails. It sits in the emerging machine-payments ecosystem around L402, x402, and agentic API commerce.
Last updated: June 13, 2026
Compare 402 Index with other Bitcoin financial services on 21Rates:
407 Bitcoin companies tracked · 23 custodians · 33 Bitcoin ETFs · 21 lenders · 22 exchanges · $106B+ tracked ETF AUM · Rates verified daily