Settlens blog https://settlens.com/blog Notes on x402 agentic payment security, conformance and evidence. en Thu, 15 Oct 2026 00:00:00 GMT Test x402 payment terms before a release https://settlens.com/blog/check-x402-payment-policy https://settlens.com/blog/check-x402-payment-policy Thu, 15 Oct 2026 00:00:00 GMT Reproduce five x402 V2 payment-policy checks with a free browser demo, curl and a small Node.js CI example. No account, wallet or payment key needed. x402 Testing Guide CI Detecting x402 payment drift: price, recipient, network and asset changes https://settlens.com/blog/detecting-x402-payment-drift https://settlens.com/blog/detecting-x402-payment-drift Tue, 13 Oct 2026 00:00:00 GMT How to catch x402 payment terms that change between identical requests or over time, with the Settlens stability check, policy pins and Monitor baselines. x402 Monitoring Drift Policy Verify before paying: a preflight check for AI agents on x402 https://settlens.com/blog/mcp-verify-before-paying https://settlens.com/blog/mcp-verify-before-paying Tue, 13 Oct 2026 00:00:00 GMT Why AI agents need a deterministic check before signing an x402 payment, how to write a spending policy in atomic units, and a worked example with real output. MCP AI agents x402 Spending policy Signed evidence for payment assessments: digests, ed25519 and offline verification https://settlens.com/blog/signed-evidence-for-payment-assessments https://settlens.com/blog/signed-evidence-for-payment-assessments Tue, 13 Oct 2026 00:00:00 GMT Why a payment security report needs an integrity digest and a signature, how Settlens signs reports with ed25519, and how auditors verify them offline. Evidence ed25519 Audit Reports Agentic payments are moving real money. Here's what breaks. https://settlens.com/blog/agentic-payments-what-breaks https://settlens.com/blog/agentic-payments-what-breaks Fri, 31 Jul 2026 00:00:00 GMT When AI agents pay APIs over x402, no human checks the price, recipient or chain. Where agentic payments break, and what agents and sellers should verify. Agentic payments AI agents x402 MCP How to test an x402 payment endpoint: a practical checklist https://settlens.com/blog/how-to-test-x402-endpoint https://settlens.com/blog/how-to-test-x402-endpoint Fri, 31 Jul 2026 00:00:00 GMT A step-by-step guide to testing an x402 V2 endpoint: passive scan, policy, facilitator checks, the authorized fail-closed probe, offline verification and CI. x402 Testing Guide CI x402 security: the payment failure modes every implementation should test https://settlens.com/blog/x402-security-failure-modes https://settlens.com/blog/x402-security-failure-modes Fri, 31 Jul 2026 00:00:00 GMT Eight ways x402 payment endpoints fail quietly, from fail-open resources and forged signatures at /verify to drift and weak binding, and how to test each one. x402 Security Testing