"How to send a message on Slack" matching MCP connectors:

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

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

Scores any web domain's public resilience: TLS, headers, DNS, response time. From $0.005 to $0.01/call, no signup.

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.

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.

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.

Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.

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.

JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion.

Free no-key IP intelligence: geolocation, VPN detection, DNS, WHOIS, blacklists, breach checks

Deterministic runtime enforcement of step order for AI agents: ALLOW/DENY before a step runs.

MCP server teaching AI agents to implement TideCloak: auth, E2EE, IGA, security analysis

Scan a website for vulnerabilities: OWASP Top 10, CVEs, SSL, headers - with plain-English fixes

Human-in-the-loop review and approval for AI agents. Audit trail, approval policies, native MCP.

Reputation oracle for AI agents on Base: SAFE/CAUTION/BLOCK + 0-100 score before you pay. x402+MCP

Ask whether a location has recent credit-card-skimmer detections, from a consumer sensor network.

EU AI Act Art-14 runtime oversight: allow / flag / gate-to-human on an agent action, with receipt.

Verify a photo's capture time and provenance: C2PA validation, EXIF/XMP, and pixel forensics. Free keyless use; one clear verdict per image. C2PA Conformant Validator, listed on the C2PA Conforming Products List.