toolo MCP server

Give your AI agent exact developer tools. Language models are bad at hashing, Base64, date math and cron schedules: they guess. The toolo MCP server computes the real answer.

https://toolo.dev/mcp

Streamable HTTP. Free, no sign-up, no API key.

Connect it

Claude Code

claude mcp add --transport http toolo https://toolo.dev/mcp

Claude (claude.ai and Claude Desktop)

Settings → Connectors → Add custom connector. Name it toolo, paste the URL, and choose no sign-in.

https://toolo.dev/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "toolo": {
      "url": "https://toolo.dev/mcp"
    }
  }
}

VS Code (.vscode/mcp.json)

{
  "servers": {
    "toolo": {
      "type": "http",
      "url": "https://toolo.dev/mcp"
    }
  }
}

Any client that only supports stdio

{
  "mcpServers": {
    "toolo": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://toolo.dev/mcp"
      ]
    }
  }
}

Tools

base64_encode: Encode text as Base64 or Base64URL
base64_decode: Decode Base64 or Base64URL to text
url_encode: Percent-encode a value or a full URL
url_decode: Decode percent-encoded text
decode_jwt: Read a JWT's header, payload and expiry
hash_text: MD5, SHA-1, SHA-2, SHA-3 hashes and HMAC
format_json: Pretty-print or minify JSON, big numbers safe
validate_json: Check JSON and get the error line and column
json_to_yaml: Convert JSON to YAML
yaml_to_json: Convert YAML to JSON
convert_case: UPPER, lower, Title, camelCase, snake_case and more
count_text: Words, characters, sentences, reading time
generate_password: Strong random passwords
generate_uuid: UUID v4 and v7
explain_cron: Cron in plain English plus next run times
test_regex: Run a regex and list matches and groups
convert_timestamp: Unix timestamp ↔ ISO date, any time zone
generate_lorem_ipsum: Placeholder text
minify_css: Minify CSS without breaking it
minify_js: Minify JavaScript with Terser
minify_html: Minify HTML, keeping pre and script intact
format_code: Format CSS, HTML or JavaScript with Prettier
markdown_to_html: Markdown (GFM) to sanitized HTML
generate_meta_tags: SEO, Open Graph and X tags, HTML or Next.js
css_gradient: Linear, radial or conic gradient CSS
generate_sample_json: Sample JSON from a template or fields
generate_fake_data: Fake rows as JSON, CSV or SQL INSERT
validate_card_number: Luhn check and card brand
generate_test_card_numbers: Test card numbers and Stripe test cards
aes_encrypt: AES-256-GCM encryption with a password
aes_decrypt: Decrypt toolo AES output
check_seo: On-page SEO score for a URL or HTML

Privacy

The web tools on toolo run in your browser. MCP tools run on our server, because your agent calls them over the network. Inputs are processed in memory and are not stored or logged. Don't send production secrets to any online tool, including this one.

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