Penniless Data Utilities MCP

A community-hosted MCP server providing ten deterministic data and lookup tools for AI agents, including JSON repair, YAML conversion, cron scheduling, diffing, text extraction, DNS/WHOIS lookups, GitHub stats, and email validation. It operates on a pay-per-use model using USDC on Base via x402 payments, requiring no accounts or API keys.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by danielarif26

You need:No accounts, no API keys, no rate-limit tiers

MCP endpoint (Streamable HTTP)

https://penniless-json-repair.sjaman.workers.dev/mcp

Vendor documentation

What its tools do

9 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

9 of 9 have a description · 0 of 9 declare behavior hints · 9 of 9 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 7, 2026, 4:44 AM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Repair malformed LLM-generated JSON into valid format
Convert YAML subsets to JSON with warnings
Calculate the next UTC cron fire time for an expression
Perform DNS lookups and WHOIS domain information retrieval

Source and maintenance

Community listingRegistry 3.1.0

mcp-registry: io.github.danielarif26/penniless-data-utilities@3.1.0 Source repository Project website

Maintenance checked: Nov 7, 2026, 12:02 AM UTC

Protocol and capabilities

Server: penniless-data-utilities 3.1.0
MCP protocol negotiated in check: 2025-11-25
Tools: 9 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Every tool costs $0.001 USDC on Base via x402 v2. Call tools/list first; an unpaid tools/call returns a payment-required error whose data carries the payment requirements. Attach the signed x402 payment in the request _meta and retry the same call.

Tools

9 advertised

repair_json — Penniless JSON Repair

Advertised by the server during the last successful anonymous check.

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.

repair_json input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "Malformed JSON text"
    }
  },
  "additionalProperties": false
}

repair_json output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

yaml_to_json — Penniless YAML to JSON

Advertised by the server during the last successful anonymous check.

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.

yaml_to_json input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "YAML document text"
    }
  },
  "additionalProperties": false
}

yaml_to_json output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

cron_next_run — Penniless Cron Next Run

Advertised by the server during the last successful anonymous check.

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.

cron_next_run input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "expr"
  ],
  "properties": {
    "expr": {
      "type": "string",
      "description": "5-field cron expression"
    },
    "after": {
      "type": "string",
      "description": "ISO timestamp to search after (default now)"
    }
  },
  "additionalProperties": false
}

cron_next_run output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

text_diff — Penniless Text Diff

Advertised by the server during the last successful anonymous check.

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.

text_diff input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "old",
    "new"
  ],
  "properties": {
    "new": {
      "type": "string",
      "description": "Changed text"
    },
    "old": {
      "type": "string",
      "description": "Original text"
    },
    "context": {
      "type": "number",
      "description": "Context lines per hunk (default 3)"
    }
  },
  "additionalProperties": false
}

text_diff output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

text_extract — Penniless Text Extract

Advertised by the server during the last successful anonymous check.

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.

text_extract input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "HTML or plain text"
    },
    "numbers": {
      "type": "boolean",
      "description": "Keep numeric strings in text output"
    },
    "codeBlocks": {
      "type": "boolean",
      "description": "Keep pre/code blocks"
    }
  },
  "additionalProperties": false
}

text_extract output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

domain_whois — Penniless WHOIS Lookup

Advertised by the server during the last successful anonymous check.

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.

domain_whois input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "domain"
  ],
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain name, no scheme"
    }
  },
  "additionalProperties": false
}

domain_whois output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

dns_lookup — Penniless DNS Lookup

Advertised by the server during the last successful anonymous check.

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.

dns_lookup input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "domain"
  ],
  "properties": {
    "type": {
      "enum": [
        "A",
        "AAAA",
        "CNAME",
        "MX",
        "TXT",
        "NS",
        "SOA",
        "PTR",
        "SRV",
        "CAA"
      ],
      "type": "string",
      "description": "Record type (default A)"
    },
    "domain": {
      "type": "string",
      "description": "Hostname to resolve"
    }
  },
  "additionalProperties": false
}

dns_lookup output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

github_repo_stats — Penniless GitHub Repo Stats

Advertised by the server during the last successful anonymous check.

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.

github_repo_stats input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "repo"
  ],
  "properties": {
    "repo": {
      "type": "string",
      "description": "owner/name"
    }
  },
  "additionalProperties": false
}

github_repo_stats output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

email_validate — Penniless Email Validate

Advertised by the server during the last successful anonymous check.

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.

email_validate input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "email"
  ],
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address"
    }
  },
  "additionalProperties": false
}

email_validate output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ok"
  ],
  "properties": {
    "ok": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 1139 ms
95th percentile latency: 1139 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 7, 2026, 4:44 AM UTC · probe · passed · 1139 ms · metadata changed · 9 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

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

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add penniless-data-utilities-mcp --url https://penniless-json-repair.sjaman.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable penniless-data-utilities-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "penniless-data-utilities-mcp": {
      "url": "https://penniless-json-repair.sjaman.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "penniless-data-utilities-mcp": {
      "type": "streamableHttp",
      "url": "https://penniless-json-repair.sjaman.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start penniless-data-utilities-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "penniless-data-utilities-mcp": {
      "type": "http",
      "url": "https://penniless-json-repair.sjaman.workers.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

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

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://penniless-json-repair.sjaman.workers.dev/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "penniless-data-utilities-mcp": {
      "serverUrl": "https://penniless-json-repair.sjaman.workers.dev/mcp"
    }
  }
}

Let your agent find its tools

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Penniless Data Utilities MCP

Endpoint and access

What its tools do

Not annotated (9)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Server-provided instructions

Tools

Prompts

Resources

90-day uptime

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other developer tools servers