betterstack-mcp

Latency breakdown, response times and page audits - no API key.

Tools

• response_times — Sample a URL several times and report min, median, average, max and jitter, so you can tell steady from flaky.
• latency_breakdown — Split one request into DNS, TCP connect, TLS handshake and time-to-headers, and say which stage is slowest.
• content_check — Audit a page's title, meta description, canonical, lang, viewport, headings, image alt text and word count.
• redirect_chain — Every hop from the URL you give to the URL that finally answers, with timing and loop detection.
• headers_report — Grouped response headers — origin, caching and CDN, compression, security and cookies — with what looks wrong.
• endpoint_summary — One call for a whole endpoint: reachable or not, latency stages, TLS certificate age and DNS address.
• certificate_info — Read the TLS certificate a host presents: subject, issuer, validity and days left, chain length, SAN list and whether Node trusts it.
• dns_records — Look up a domain's A, AAAA, CNAME, MX, TXT, NS and CAA records at once and report its SPF and DMARC status.
• port_check — Test whether TCP ports accept a connection, with the time each port took and the reason a port is closed.
• tls_versions — Check whether a host still negotiates TLS 1.2 and TLS 1.3, and which protocol and cipher it picks for each.

Setup

No setup. Requests are measured live from the server itself, so there is no key or account.

Part of awesome-mcps.

Premium tools

These tools need a license key:

• domain_registration
• crawl_rules

Buy a key at https://mcp-marketplace.io/server/io-github-mrfentmen-betterstack-mcp and set it in your MCP client config:

"env": { "MCP_LICENSE_KEY": "mcp_live_..." }

The key is checked against MCP Marketplace, cached for 24 hours, and keeps working offline once one check has succeeded. Every other tool on this server stays free.