PincerPay

On-chain USDC payment gateway for AI agents. Instant settlement on Solana, Base, and Polygon via x402. 20 tools: paywall management, transaction monitoring, middleware scaffolding Express/Hono/Next.js), gas estimation, and agent client generation. 6 prompts for onboarding, integration, debugging, and monitoring. Includes chain configs, docs, and OpenAPI spec. Developer tools work without a key.