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Cited Brief

by cited-brief.cited-brief.workers.dev · remote · no sign-in to list tools · v1.1.0 · published by dev.workers.cited-brief.cited-brief

Paid web research tools: cited briefs, quote checks, page text. Pay per call in USDC via x402.

Changes · 5
CompareRegistry entry

7 tools: 5 change things and 2 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http cited-brief https://cited-brief.cited-brief.workers.dev/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncheck_links

    The server marks "check_links" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "check_links" says "link": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 5Claude Code: ask
  • check_doiLooks up 1-10 DOIs or arXiv ids: does the paper exist, its title, authors, year and venue, how often it is cited, and whether it has been retracted.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Looks up 1-10 DOIs or arXiv ids: does the paper exist, its title, authors, year and venue, how often it is cited, and whether it has been retracted. Pass the titles you cited to see if they match the real ones. Catches made-up references. No AI involved; if the lookup services are down you are not charged. Price: $0.01 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • check_quoteChecks whether 1-10 quotes really appear on a web page (ignoring case, spacing, and quote or dash styles) and returns the surrounding text.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Checks whether 1-10 quotes really appear on a web page (ignoring case, spacing, and quote or dash styles) and returns the surrounding text. Use it to catch made-up citations. No AI involved; if the page can't be read you are not charged. Price: $0.01 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • cited_briefAnswers a question from 1-5 web pages you name.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Answers a question from 1-5 web pages you name. Every claim comes with a verbatim quote that is re-checked on the live page; claims that fail are dropped, and if none pass you are not charged. Price: $0.10 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • domain_checkDomain age and registration facts (created, expires, registrar, status, nameservers) from the registry's RDAP or WHOIS service, plus live DNS (address records, mail servers, SPF, D…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Domain age and registration facts (created, expires, registrar, status, nameservers) from the registry's RDAP or WHOIS service, plus live DNS (address records, mail servers, SPF, DMARC) and plain flags such as "registered only 9 days ago". Use it to judge how trustworthy a site is. No AI involved. Works for most TLDs (.com, .org, .io, .ai, .dev, .co.uk and over a thousand more); if the registry has no public lookup (for example .de, .jp, .co, .ru, .ac.uk) or does not answer, you are not charged. Price: $0.02 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
Only reads 2Claude Code: allow
  • page_textFetches a public web page and returns its title and readable text, without scripts, styles or markup (up to 100,000 characters).No findings

    Why it is in this group

    • The description's first verb is "fetch": a word for reading.
    Description, as the server wrote it
    Fetches a public web page and returns its title and readable text, without scripts, styles or markup (up to 100,000 characters). If the page can't be read you are not charged. Price: $0.01 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • robots_checkReads the site's robots.txt and says whether a crawler may fetch a URL (RFC 9309: the longest matching rule wins, Allow wins a tie), with the matching rule, crawl-delay and sitemap…No findings

    Why it is in this group

    • The description's first verb is "read": a word for reading.
    Description, as the server wrote it
    Reads the site's robots.txt and says whether a crawler may fetch a URL (RFC 9309: the longest matching rule wins, Allow wins a tie), with the matching rule, crawl-delay and sitemaps. No AI involved; if robots.txt cannot be read you are not charged. Price: $0.01 USDC per call (x402).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cited-brief https://cited-brief.cited-brief.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cited-brief__page_text",
      "mcp__cited-brief__robots_check"
    ],
    "ask": [
      "mcp__cited-brief__cited_brief",
      "mcp__cited-brief__check_quote",
      "mcp__cited-brief__check_links",
      "mcp__cited-brief__check_doi",
      "mcp__cited-brief__domain_check"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cited-brief. Review it before you use it.