"Simple HTTP server or client implementation" matching MCP servers:

Enables LLMs to make HTTP requests with OAuth2, session cookies, retry logic, and cURL command generation, while providing security features like SSRF protection and TLS enforcement.

Enables users to analyze HTTP response headers of any URL for security and configuration, returning a 0-100 security score, HSTS/CSP and header checks, server detection, caching details, and recommendations. Supports pay-per-call access via x402 micropayments.

Enables agents to interact with the Human Is Offline protocol by reading authority cards, submitting encrypted ask-first notes, and fetching delegation receipts.

MCP server for end-to-end encrypted secret storage and retrieval, enabling LLM agents to fetch secrets by name via one-time URLs while keeping plaintext out of model context and logs.

Analyze and score HTTP security headers (CSP, HSTS, CORS, cookies) with actionable fix recommendations for web applications.

Enables read-only inspection of a Zoho mailbox over a one-shot, outbound-only connection — listing accounts and folders, listing or searching messages, and retrieving message content and attachment metadata — plus bounded parsing of aggregate DMARC report attachments via a separate REST adapter. It performs no writes, sends, deletes, or read-marks, and requires a trusted private configuration envelope for pinned hosts, mailboxes, and credentials.

A local stdio MCP server that authenticates to remote OAuth-protected MCP servers using the client_credentials grant, handling token acquisition and request forwarding.

Enables network security scanning using Nmap through MCP protocol. Supports quick port scans, full port scans with service detection, and custom Nmap commands with async task management.

Scans suspicious messages, URLs, and text for scams inside any MCP-compatible AI assistant. No signup or API key needed for anonymous use.

Governance circuit-breaker MCP server that enables AI agents to request risk-based decisions, approve or deny actions, and finalize outcomes with full audit receipts.

Non-custodial memory MCP server with client-side encryption, enabling secure remember, recall, forget, and share operations with post-quantum security.

Enables AI agents to verify email addresses, clean lists, run bulk verification jobs, and manage a Verifly account through natural language, without writing HTTP calls.

Enables email address verification through a single MCP tool, returning whether an address is valid, invalid, or risky.

MCP server that lets agents order temporary phone numbers, receive SMS verification codes, and manage activations via nine simple tools.

Enables AI assistants to execute malware analysis tools on a REMnux system via Docker, SSH, or local connections. It provides automated file-type analysis, structured tool discovery, and security guardrails for streamlined malware investigation.

Enables simple memo management with user registration, login, and session-based per-user memo operations (add, list, delete) via MCP.

MCP server for Open Policy Agent (OPA) and the Rego policy language. Wraps the OPA CLI and Regal linter with 32 tools for authoring, evaluating, and debugging Rego policies through any MCP-compatible client.

MCP server providing 35 utility tools for AI agents including text analysis, encoding, hashing, password generation, JSON/CSV/XML parsing, regex, color, date, finance, URL metadata, SEO tags, DNS lookup, SSL inspection, and JWT decoding. Free, zero-dependency, and works with any MCP client.

Enables checking URLs against PhishTank's phishing database, searching for phishing URLs by target or date, and retrieving phishing statistics, with built-in rate limiting and caching.

Lets Claude or any MCP client manage a Fortinet FortiGate firewall through the FortiOS 7.6 REST API, covering firewall policies, NAT and port forwards, DNS and DHCP, application control, certificates, and live traffic and logs. It adds read-only and dry-run guardrails, clear FortiOS error explanations, and optional k3s and Proxmox integrations that keep firewall objects in sync with clusters and hypervisors.