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If you run an API or online service, you can charge AI agents per request by accepting x402 payments and nanopayments. The third-party platforms below help you add this support without building the integration yourself.
To integrate nanopayments directly into your own server, follow the seller quickstart or the how-to for adding nanopayments to an existing x402 seller.

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Third-party platforms

These independent platforms offer hosted tooling and onboarding flows for accepting agent payments. Supported payment standards and blockchains vary by platform, so check each platform for details.

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Blockrun

Blockrun supports x402 and nanopayments. It helps API sellers list their services in a directory and accept payments settled in USDC onchain.

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Proceeds

Proceeds supports x402, nanopayments, and the Machine Payments Protocol (MPP). It helps sellers accept agent payments on Arc and other blockchains.

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Sponge

Sponge supports x402 and MPP, but not nanopayments. It lets API providers accept agent payments with minimal code changes.