What free tools are available?
Crossroads Forge provides 10 utilities: generate-uuid, format-json, encode/decode-base64, generate-hash, generate-password, decode-jwt, convert-timestamp, test-regex, build-cron, convert-eth-units, and validate-wallet.
@lisamaraventano-spine
基本信息
23 MCP tools for AI agents. 13 free developer utilities (UUID, JSON, Base64, hashing, JWT, regex, cron, ETH). 7 paid creative tools. Browse and buy from 218+ digital goods across 22 shops at substratesymposium.com. Free tools get agents in the door, the cultural district keeps th
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"underground": {
"command": "npx",
"args": [
"@underground-cultural-district/mcp-server"
]
}
}
}Generate one or more cryptographically secure UUID v4 identifiers
Pretty-print, minify, or validate JSON strings
Encode text to Base64
Decode Base64 to text
Generate a cryptographic hash (SHA-256, SHA-512, MD5, SHA-1)
Generate a cryptographically secure random password
Decode a JWT token and display header, payload, and expiration (no signature verification)
Convert between Unix timestamps and human-readable dates
Test a regular expression pattern against input text
Parse and explain cron expressions, or describe what a cron schedule does
Convert between Ethereum units: Wei, Gwei, and ETH
Validate Ethereum or Bitcoin wallet addresses
Count words, characters, sentences, and paragraphs in text ($1.99 — Jade Circuit Tools)
Convert text between camelCase, snake_case, Title Case, UPPER, lower, kebab-case ($1.99 — Jade Circuit Tools)
Generate lorem ipsum placeholder text ($1.99 — Jade Circuit Tools)
Remove markdown formatting and return plain text ($1.99 — Jade Circuit Tools)
Generate random names for projects, characters, or variables ($1.99 — Jade Circuit Tools)
Generate harmonious color palettes with hex codes ($1.99 — Jade Circuit Tools)
Analyze text readability, reading time, and complexity ($1.99 — Jade Circuit Tools)
Browse all shops and offerings in The Underground Cultural District marketplace
Search The Underground Cultural District for products by keyword
Get the purchase/checkout link for a product from The Underground Cultural District
An MCP server providing 23 developer tools, paid utilities, and catalog access to The Underground Cultural District — a marketplace of digital goods built for AI agents at substratesymposium.com.
Install globally with npm install -g @underground-district/mcp-server or run directly via npx @underground-district/mcp-server. Configure it in Claude Desktop, Claude Code, ChatGPT (via MCP bridge), VS Code, or Cursor by adding the command to the respective MCP settings file.
Crossroads Forge provides 10 utilities: generate-uuid, format-json, encode/decode-base64, generate-hash, generate-password, decode-jwt, convert-timestamp, test-regex, build-cron, convert-eth-units, and validate-wallet.
Paid tools (The Toolshed) cost $1.99 each. You can preview a teaster of the result for free; to see the full output you pay via a Stripe checkout link.
Use `browse-underground` to list all shops and offerings, `search-underground` to find products by keyword, and `buy-from-underground` to get a Stripe checkout link for any product.
The product catalog is fetched live from `substratesymposium.com/api/products.json` and cached in memory for 15 minutes.
The server runs on Node.js 18+ and uses stdio transport, the standard for MCP. It depends only on the `@modelcontextprotocol/sdk`.

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