Alternatives

Products that do what Mercury402 does

Monetize any API with pay-per-call payments

1. 1
   x402▲119

   An open protocol for internet-native payments from Coinbase

   2025

2. 2
   Mercury API▲289

   API for your business bank account

   2019

3. 3XA
   X402 – an open standard for internet native payments▲16

   Hi HN – excited to announce x402, initially developed by Coinbase (YC 12) x402 lets any HTTP API charge per request without issuing API keys or storing credit cards. Buyers (humans or AI agents) keep funds in their own wallet and dynamically discover compatible endpoints, call them as usual, and automatically pay a microtransaction in USDC or other tokens to settle. 90 second demo: https://www.youtube.com/watch?v=PV-L2AfLhJg Problem: Every time we want to use a new API we have to: find the service online create a developer account, copy a secret key into env vars, pre-fund or…

   2025 · x402.org

4. 4
   Mercury▲728

   Banking stack for startups

   2019 · mercury.com

5. 5
   x402stock▲3

   x402 API for US stock market data

   Jun 2026 · x402stock.xyz

6. 6
   P402.io▲102

   Route, verify, and settle paid API calls with clear traces

   Jan 2026

7. 7
   x402 wallet API: 9 Base endpoints, USDC▲1

   9 Base endpoints for AI agents, paid in USDC per call

   Aug 2026 · api.kachangsia.com

8. 8
   L402.org▲122

   Internet-native paywalls with HTTP 402 status code

   2024

9. 9
   pay.sh▲347

   Discover, access, and pay for any API autonomously

   May 2026 · pay.sh

10. 10
    x402stats▲3

    Independent x402 stats: organic volume, wash-trades removed

    Aug 2026 · x402stats.io

11. 11
    Script Master Labs x402 Data API▲3

    Pay-per-call federal data API — FDA, SEC, Treasury via x402

    Jun 2026

12. 12
    Alpaca Data API▲323

    Free real-time stock market data API

    2020

13. 13
    Run402▲5

    Monetize any API with one line of code.

    Jul 2026 · run402.dev

14. 14
    Flagright▲117

    Risk-based transaction monitoring API for fintech startups

    2022

15. 15
    Mercury Expense Reimbursements▲180

    Reimburse out-of-pocket employee expenses right from Mercury

    2024

16. 16
    CurrencyStack▲113

    A free modern currency data API for fintech apps.

    2019

17. 17
    J-sey Data API▲5

    Pay-per-call data API for AI agents, no subscriptions

    Jul 2026 · jsey.dpdns.org

18. 18
    Finage▲104

    Real-time API platform for stock, forex, and crypto data

    2025

19. 19
    Artha

    Pay-per-call financial data API with x402 on Base

    Mar 2026 · artha.getakasha.finance

20. 20
    MAXIA Oracle▲64

    Multi-source price feed for AI agents

    Apr 2026 · oracle.maxiaworld.app

21. 21
    API Pick▲71

    Data APIs for AI agents & developers — free to start

    Feb 2026

22. 22
    PayGate▲1

    One line of code to monetize any API in stablecoins

    May 2026 · paygate.deltab.ai

23. 23
    MoneyHash - Your payment super API▲82

    Build a custom payment stack for your business

    2022

24. 24
    JellyNet▲22

    Sell your idle API quota. Buy any LLM for less.

    May 2026 · jellynet.net

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