"A calculation evaluating the expression 9999519 plus 9999490" matching MCP connectors:

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

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

Neutral fairness computation for agents: two or more parties submit sealed inputs, a published deterministic algorithm runs (fair division, verifiable random selection, Shapley shares), and every party receives an identical signed certificate anyone can re-run and verify for free.

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.

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

IOCs (URLs, domains, IPs, hashes) shared by the infosec community on X/Twitter. No auth, CC0.

Ten machine-readable signals on one public page: the top miss if any, and a receipt we re-verify.

Search newly registered, expired, aged, active, deleted and for-sale domains, plus WHOIS and DNS.

Shodan MCP — wraps the full Shodan REST API (api.shodan.io)

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

Twelve tools: token, wallet, contract and site security. Two free, the rest $1 in USDC over x402.

Audits NEXUS's own x402 payment logs against its own delivery logs and issues a signed proof-of-deli

DNS and email security: check SPF, DKIM, DMARC, DNSSEC, DANE and build the records. 45 tools.

Free lockfile malware check plus paid pre-install scan of any skill, tool, or package.

Capture a web source, or seal a hash you hold, into a signed receipt anyone can verify offline.

Open weekly security base rates (CC BY 4.0), plus live DMARC, takeover and WHOIS checks.

Inventory and audit your agent fleet over MCP: audit_mcp_config returns risk-ranked findings with a 0-100 posture score, scope_check ranks tool-manifest blast radius, audit_skill_file and injection_scan screen untrusted skill files and text, and inventory_report builds a governance inventory with risk tiers. All analysis is deterministic and local to the request.