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This page gets you set up quickly as a merchant (server) or a buyer (client). Choose your language and framework below to get started.
Scroll to the end to see all supported blockchain networks.

Servers (Merchants)

Express

Quickstart for building an x402-enabled server with Express.

Hono

Quickstart for building an x402-enabled server with Hono.

NextJS (coming soon)

NextJS server quickstart is coming soon.

Clients (Buyers)

Axios

Quickstart for building an x402 client with Axios.

Fetch

Quickstart for building an x402 client with Fetch.

Facilitator

The PalPaxAI facilitator URL is https://facilitator.PalPaxAI.network. Simply set the facilitator URL in your server configuration and you’re good to go. The PalPaxAI facilitator supports the following endpoints:
  • /verify
  • /settle
  • /list
Read the reference for more information on the facilitator endpoints and responses.

Supported networks

The PalPaxAI facilitator supports x402 on the following networks:
Network NameNetwork String
Avalancheavalanche
Avalanche Fujiavalanche-fuji
Basebase
Base Sepoliabase-sepolia
IoTeXiotex
Peaqpeaq
Polygonpolygon
Polygon Amoypolygon-amoy
Seisei
Sei Testnetsei-testnet
Solanasolana
Solana Devnetsolana-devnet

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