"A GitHub repository for agent guardrails" matching MCP connectors:

Signed machine messages + wallet trust gates via x402; free verifiable agent passports.

Scan code for quantum-vulnerable cryptography and get NIST post-quantum migration guidance.

AI reasoning checks any document against known international standards before your agent acts on it.

Discovery, OAuth, project operations, and exact project MCP handoff for Spala backend projects.

Identity infrastructure for the AI economy. Confirms if someone is known; returns inferred traits.

Public data intelligence for AI agents — CVE, compliance, patents, contracts, domains.

Hosted, OAuth-gated endpoint for quantakrypto's post-quantum crypto tools: scan code for quantum-vulnerable cryptography (RSA/ECDH/ECDSA/DH) and get NIST ML-KEM/ML-DSA/SLH-DSA migration guidance over authenticated HTTP — nothing to install. Sign-in required (Google/GitHub/email). Same tools as the open-source @quantakrypto/mcp server; source at github.com/quantakrypto/pqc-tools.

Scan public websites for privacy, cookie, tracker, consent, policy, and disclosure risk signals. Start instantly with zero-auth Light mode—no account or API key required.

Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

Read-only MCP server for turva.dev, an agent-readiness audit and advisory service.

Runtime permission, approval, and audit layer for AI agent tool execution.

Governance firewall for autonomous AI agents. Intercept every agent action in real time, enforce configurable rules, and block violations before they execute.

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

Verifiable provenance for AI agents — ZK proofs over confidential documents, no plaintext exposure.

Keep AI answers fresh with free source previews, scheduled monitoring, evidence history, and alerts.

Score the privilege a Chrome MV3 extension takes from its manifest, and diff permission sets.

Pre-connect trust checks for AI agents and MCP servers using HVTracker's public trust registry.

Pay-per-call cybersecurity for AI agents: vuln scans, threat intel, compliance, code security.

Per-transaction crypto trade validator for AI agents. Returns deterministic PROCEED / CAUTION / BLOCK verdicts using WaveGuard anomaly detection, history checks, and rug-pull risk analysis.