SkillSKL-DCCDC0E7

x402

Implement and debug x402 v2 payment flows for HTTP APIs and MCP tools. Use when tasks involve 402 Payment Required handling, PAYMENT-REQUIRED/PAYMENT-SIGNATURE/PAYMENT-RESPONSE headers, x402 MCP _meta keys (x402/payment, x402/payment-response), Rust x402-rs crates (x402-axum/x402-reqwest/x402-types), facilitator verify/settle flows, CAIP-2 network IDs, or migration from x402 v1 headers.

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