"Spring Security" matching MCP servers:

Performs static security analysis of Solana programs and generates x402 payment invoices for automated agent-to-agent audit workflows.

Open-source sample MCP server built to be audited: ships a paid-tool x402 demo, a deliberately scannable surface, and documented security posture. From Payload, makers of the MCP Launch Readiness Audit (48-rule scanner with a fix for every finding, hardening templates, stress-test harness, readiness verifier, CI workflow, branded audit report) and the MCP Monetization Kit.

Enables AI agents to access DDG's payable services including checkout/payment conformance, MCP/tool security audits, agent-discovery repair, and buyer-agent smoke probes, with structured payment challenges.

MCP services for agent security preflight, source scanning, injection screening, proof-of-work policy rehearsal, carbon accounting, climate disclosure and regulatory monitoring. Use each hosted endpoint in the README. Inspect a free quote before buyer-authorized x402/USDC payment. Includes free trust and settlement tools. Maxwell rehearsal does not activate runtime protection.

Enables AI assistants to inspect BLMPay balances, payments, payouts, webhooks, and API capabilities through MCP tools, with write/financial tools disabled by default for security.

Stop AI agents leaking your card or making hallucinated purchases. No SaaS, No login, Fully local. A runtime security layer that protects AI agents during online purchases. It sits between the agent and payment forms

Enables AI agents to pay for services in DigiByte/DigiDollar on testnet via the x402 pay-and-retry pattern, with spend limits and security policies.

Validates agent payment requests against 9 security checks before execution, catching policy violations, replay attacks, amount tampering, revoked tokens, and budget overruns.

Multi-chain x402 payment gateway enabling AI agents to pay per HTTP call with real on-chain settlement across 5 mainnet chains, providing 18 paid endpoints for utilities, data, and security.

A production-grade MCP server for a fictional digital bank, exposing tools for an AI copilot to service customers across the full risk spectrum from read-only lookups to money movement and destructive admin actions, with OAuth 2.1 security and a realistic dataset.