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Adds a machine-to-machine x402 payment flow as an alternative to the existing browser-based credit card checkout. The merchant backend serves HTTP 402 responses with payment requirements, and agents sign and settle USDC payments on-chain via a facilitator. - Add x402 setup module with server initialization and settlement logic - Rewrite x402 checkout endpoint as two-mode (402 → sign → 200) flow - Add wallet setup scripts for merchant and agent - Add Solana ATA creation script - Add x402 checkout UI to TAP agent Streamlit app - Add x402 header logging to CDN proxy - Update README with setup, facilitator, and production docs - Add *.db and .env to .gitignore Tested end-to-end on Solana devnet and Base Sepolia testnet.
Capture and decode the base64-encoded PAYMENT-RESPONSE header returned by the merchant after settlement, showing the facilitator receipt in the Streamlit UI.
The payment requirements are already encoded in the PAYMENT-REQUIRED header per the x402 spec. No need to duplicate them in the JSON body.
Add five low-cost digital products ($0.01-$0.50) to the sample data seed script, suitable for testing x402 payments with small amounts of testnet USDC.
Change x402 checkout to use CDN_PROXY_URL (localhost:3001) instead of hitting the merchant backend directly, aligning with the TAP architecture where all agent traffic flows through the CDN proxy.
Users hitting a ValueError on quickstart because RSA/Ed25519 keys weren't configured. This adds a one-command setup script and updates the README quickstart with the new step.
Auto-seed the database (including digital products for x402) when the merchant backend starts, so users don't need to run create_sample_data.py manually. Also removes the stale merchant.db that was committed despite .gitignore, and cleans up setup_keys.py output.
- setup_x402.py: orchestrates wallet generation, ATA creation, and polls for SOL/USDC funding with in-place terminal updates - Wallet scripts now prompt before overwriting existing private keys - Remove redundant next-steps output from sub-scripts since the orchestrator handles user guidance - Only poll USDC for agent wallets (merchants receive payments) - Improve x402 testing instructions in README
The database and sample data are now created automatically when the server starts, so remove the manual create_sample_data.py step from the setup instructions.
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Add x402 payment integration (USDC on Solana and Base)
Adds a machine-to-machine x402 payment flow as an alternative to the
existing browser-based credit card checkout.
The merchant backend serves HTTP 402 responses with payment requirements, and agents sign and settle
USDC payments on-chain via a facilitator.
Tested end-to-end on Solana devnet and Base Sepolia testnet.
Demo
x402-checkout-demo-compressed_1_3x_with_groovesalad_soft.mp4