Add x402 payment layer — monetize Brave Search MCP with one command

[0xAllenDev]

Hi

I built ag402 (https://github.com/AetherCore-Dev/ag402) — a payment middleware for MCP servers based on Coinbase x402 protocol.

The problem: Brave Search API has real costs per query, but there is no easy way to charge MCP consumers.

The solution: ag402 wraps any MCP server with a USDC paywall in one command:

pip install ag402-core
ag402 serve --target http://your-mcp:3000 --price 0.01 --address

Every request requires $0.00025/tx on Solana. Zero code changes.

Already in production: Token RugCheck is live on Solana mainnet — AI agents pay $0.02 USDC per audit.

Key specs: Solana USDC, ~$0.00025/tx, ~0.5s settlement, 1ms prepaid mode, non-custodial, MIT licensed.

Would love to discuss integration!

Links: ag402 (https://github.com/AetherCore-Dev/ag402)

[kdenhartog]

We're aware of x402 and may consider it in the future, but at the current point do not plan to implement it without privacy by default available. Furthermore, we need to see enough demand of x402 to justify maintaining this alongside stripe invoicing. So far we've not seen that.

see https://github.com/coinbase/x402/issues/406