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Feranor Resilience MCP Server

answering

Feranor Resilience is answering right now. Last checked 6 min ago. It exposes 6 tools.

Scan/purge hidden text & score web domains: TLS, DNS, headers, speed. Free scans, $0.01 actions.

Uptime history 51 days of history · worst day 98%
51 days agonow
100.0%
Uptime 24h
91 of 91 checks
6
Tools
read from the server
275 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 9 August 2026. No other catalogue keeps this.

14 Aug 2 tools appeared text_purge_v1, text_scan_v1
14 Aug 2 tools disappeared purge_text_v1, scan_text_v1
14 Aug a tool changed version2 times that day
13 Aug 2 tools appeared purge_text_v1, scan_text_v1
13 Aug a tool changed version
12 Aug a tool changed version
11 Aug a tool changed version
10 Aug a tool appeared domain_check_score_batch_v1
9 Aug a tool description was rewritten domain_check_batch_v1
and 1 more, back to 9 August 2026

Tools have disappeared from this server

A tool that vanishes takes a piece of your agent with it, and the change arrives silently. Watch this server and every such change lands in your inbox.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

run in your terminal
claude mcp add resilience --transport http https://www.feranor.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "resilience": {
      "url": "https://www.feranor.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.resilience]
url = "https://www.feranor.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "resilience": {
      "url": "https://www.feranor.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "resilience": {
      "url": "https://www.feranor.com/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

domain
domain_check_batch_v1
Runs the full resilience check on up to 100 domains in a single call and returns the same scored report for each one: TLS certificate, security headers, DNS redundancy, response time, with every individual finding. Use it to audit a portfolio, to rank a list of vendors, or to re-check a fleet after a config rollout. A domain that cannot be reached is returned with its own error rather than failing the batch, and it is still charged, because the crawl was attempted. Do not use it for a single domain: domain_check_v1 is simpler and costs the same for one. Private, internal and localhost hostnames and IP addresses are rejected. Price: $0.01 per domain, dropping to $0.005 from 100 domains, up to 100 per call. One payment covers the whole batch (x402, USDC on Base). No signup, no API key.
domain_check_score_batch_v1
Free. Returns the overall resilience score out of 100 for up to 100 public web domains, plus the score of each category and how many findings each one raised. Use it to triage a portfolio: rank a list of domains, confirm which ones are healthy, or decide which ones are worth pulling the full report on. It tells you which categories are weak and how many issues they hold, but not what the issues are. A domain that cannot be reached is returned with its own error rather than failing the batch. Duplicates are removed. For the individual findings and the prioritised remediation list on a whole list, use domain_check_batch_v1. For a single domain, use domain_check_score_v1. Free, no payment required.
domain_check_score_v1
Free. Returns the overall resilience score out of 100 for a public web domain, plus the score of each category and how many findings each one raised. Use it to triage: to rank a list of domains, to confirm a domain is healthy, or to decide whether the detailed report is worth pulling. It tells you which categories are weak and how many issues they hold, but not what the issues are. For the individual findings and the prioritised remediation list, use domain_check_v1. Free, no payment required.
domain_check_v1
Measures how resilient a public web domain is from the outside and returns a weighted score out of 100, a per-category breakdown, and prioritised findings explaining what to fix first. Use it to audit a domain you do not control, to verify a fix after deployment, or to compare several domains on the same scale. Covers TLS certificate validity and protocol version, HTTP to HTTPS redirection, HSTS, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, cache directives, response time, DNS redundancy, IPv6 availability, CDN detection and software version disclosure. Everything is read from the public internet: nothing is authenticated, no ports are scanned, and no credentials are needed. Do not use it for private, internal, or localhost hostnames, for IP addresses, or to test a service you need logged-in access to. For a free score without the detailed findings, use domain_check_score_v1 instead. Price: $0.01 per call (x402, USDC on Base). No signup, no API key.
text
text_purge_v1
Removes invisible Unicode characters and replaces homoglyphs in a text string. Returns the cleaned text plus a before-and-after comparison. Use this tool after text_scan_v1 to fix flagged issues. Price: $0.01 per call (x402, USDC on Base). No signup, no API key.
text_scan_v1
Free. Scans a text string for invisible Unicode characters, homoglyphs, and normalization issues. Returns a risk score and a detailed report. Use this tool before text_purge_v1 to inspect suspicious content. Free, no payment required.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

purge_text_v1
removed 14 Aug 2026
scan_text_v1
removed 14 Aug 2026

Endpoints

URLTransportStateLatencyChecked
https://www.feranor.com/mcp streamable-http answering 279 ms 6 min ago

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Feranor Resilience — questions

Answers built from our own checks of this server.

What can Feranor Resilience do?
It exposes 6 tools, read directly from the server on our last check. Among them: domain_check_batch_v1, domain_check_score_batch_v1, domain_check_score_v1, domain_check_v1, text_purge_v1, text_scan_v1. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
What is Feranor Resilience mostly used for?
Its tools cluster around domain and text. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Feranor Resilience working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 275 ms. The bar chart above shows every period we have measured.
Did Feranor Resilience ever remove tools?
Yes. purge_text_v1, scan_text_v1 are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.
How do I connect Feranor Resilience?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Feranor Resilience need an API key?
No. Feranor Resilience completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Feranor Resilience?
It answers our handshake in 275 ms on average, which is faster than 57% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.