Agon Gateway

Agon Gateway is a hosted, Vercel-ready x402 gateway that turns major Solana infrastructure providers and the Tokens API into permissionless, pay-per-call HTTP endpoints. Clients do not need upstream API keys — they authenticate and settle directly with a Solana wallet. The gateway is intentionally narrow and safe:

• Standard x402 exact flow for paid Solana RPC and DAS routes.
• SIWX (sign-in-with-x) auth-only x402 flow for Tokens API routes.
• CDP facilitator for standard x402 verification and settlement.
• Solana mainnet USDC settlement.
• Alchemy and Helius as upstreams for Solana RPC/DAS.
• Tokens API v1 proxied with server-side auth, exposed to clients via wallet signatures instead of end-user API keys.
• Replay protection and rate limiting backed by Upstash Redis.
• Internal self-hosted facilitator endpoints protected by a shared secret.

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When to use the gateway

The gateway is a good fit when any of the following are true:

• You want paid Solana RPC/DAS access without managing an upstream API key.
• You want wallet-authenticated access to the Tokens API without shipping an API key.
• You are building an agent or automated client and want to pay per request from a Solana wallet.
• You want to prototype an x402 integration against real infrastructure before running your own resource server.

If you want to understand the underlying settlement protocol — Agon Protocol — see the Protocol Docs. The gateway is one application-layer example of where Agon-style machine payments are useful; the protocol itself is a separate product.

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Live deployment

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What it is not

• Not a custodian. The gateway never holds client funds. Payments settle directly on Solana through the CDP facilitator.
• Not a protocol. The gateway is a standard x402 resource server. It composes with any x402 client.
• Not a token. There is no gateway token. Every request settles in USDC on Solana mainnet.

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See also

• Quickstart
• How it works
• Access modes
• Route catalog