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Penniless Data Utilities

by danielarif26 · remote · no sign-in to list tools · v3.1.0 · published by GitHub user danielarif26

Ten x402-paid tools for JSON, YAML, cron, diff, text, DNS, WHOIS, GitHub, crypto, and email.

Changes · 6
CompareRegistry entry

9 tools: 6 change things and 3 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http penniless-data-utilities https://penniless-json-repair.sjaman.workers.dev/mcp

Tools

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

9 tools

Changes things 6Claude Code: ask
  • cron_next_runComputes the next UTC fire time for a 5-field cron expression (supports steps, ranges, lists, and month/weekday names).No findings

    Why it is in this group

    • The name "cron_next_run" says "run": a word for a change.
    Description, as the server wrote it
    Computes the next UTC fire time for a 5-field cron expression (supports steps, ranges, lists, and month/weekday names). Body {expr, after?} -> {ok, next, epochMs}. Costs $0.001 USDC on Base per call.
  • domain_whoisStructured WHOIS via RDAP for any domain: registrar, IANA id, statuses, expiry/registration dates, nameservers, DNSSEC.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.
    Description, as the server wrote it
    Structured WHOIS via RDAP for any domain: registrar, IANA id, statuses, expiry/registration dates, nameservers, DNSSEC. Body {domain} -> {ok, found, domain, registrar, status[], events{}, nameservers[], dnssec}. Costs $0.001 USDC on Base per call.
  • github_repo_statsPopularity and metadata for any public GitHub repo: stars, forks, open issues, watchers, language, license, topics, last push.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.
    Description, as the server wrote it
    Popularity and metadata for any public GitHub repo: stars, forks, open issues, watchers, language, license, topics, last push. Body {repo} -> {ok, found, stars, forks, openIssues, language, license, pushedAt}. Costs $0.001 USDC on Base per call.
  • repair_jsonRepairs malformed LLM JSON: strips Markdown fences and prose wrappers, fixes trailing commas, converts Python literals (True/False/None) and single/unquoted keys, removes comments,…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.
    Description, as the server wrote it
    Repairs malformed LLM JSON: strips Markdown fences and prose wrappers, fixes trailing commas, converts Python literals (True/False/None) and single/unquoted keys, removes comments, recovers balanced JSON from truncated output. Body {input} -> {ok, repaired, applied}. Costs $0.001 USDC on Base per call.
  • text_extractExtracts clean text, title, headings, links, URLs, and emails from HTML or plain 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.
    Description, as the server wrote it
    Extracts clean text, title, headings, links, URLs, and emails from HTML or plain text. Body {input, numbers?, codeBlocks?} -> {ok, source, title, headings, links, urls, emails, text}. Costs $0.001 USDC on Base per call.
  • yaml_to_jsonConverts a YAML subset (block maps, sequences, nested indentation, scalars, comments) into JSON with no runtime dependency.No findings

    Why it is in this group

    • The description's first verb is "convert": a word for a change.
    Description, as the server wrote it
    Converts a YAML subset (block maps, sequences, nested indentation, scalars, comments) into JSON with no runtime dependency. Body {input} -> {ok, value, warnings}. Costs $0.001 USDC on Base per call.
Only reads 3Claude Code: allow
  • dns_lookupJSON DNS-over-HTTPS lookup for A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, SRV, CAA.No findings

    Why it is in this group

    • The name "dns_lookup" says "lookup": a word for reading.
    Description, as the server wrote it
    JSON DNS-over-HTTPS lookup for A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, SRV, CAA. Body {domain, type?} -> {ok, domain, type, status, answers[]}. Costs $0.001 USDC on Base per call.
  • email_validateEmail deliverability check: RFC-style syntax plus live MX probe of the domain.No findings

    Why it is in this group

    • The name "email_validate" says "validate": a word for reading.
    Description, as the server wrote it
    Email deliverability check: RFC-style syntax plus live MX probe of the domain. Body {email} -> {ok, valid, formatValid, domainHasMx, mx[]}. Costs $0.001 USDC on Base per call.
  • text_diffProduces a unified diff plus added/removed counts between two texts (LCS line diff, configurable context lines).No findings

    Why it is in this group

    • The name "text_diff" says "diff": a word for reading.
    Description, as the server wrote it
    Produces a unified diff plus added/removed counts between two texts (LCS line diff, configurable context lines). Body {old, new, context?} -> {ok, identical, added, removed, hunks, unified}. Costs $0.001 USDC on Base per call.

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 3.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http penniless-data-utilities https://penniless-json-repair.sjaman.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__penniless-data-utilities__text_diff",
      "mcp__penniless-data-utilities__dns_lookup",
      "mcp__penniless-data-utilities__email_validate"
    ],
    "ask": [
      "mcp__penniless-data-utilities__repair_json",
      "mcp__penniless-data-utilities__yaml_to_json",
      "mcp__penniless-data-utilities__cron_next_run",
      "mcp__penniless-data-utilities__text_extract",
      "mcp__penniless-data-utilities__domain_whois",
      "mcp__penniless-data-utilities__github_repo_stats"
    ],
    "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 penniless-data-utilities. Review it before you use it.