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mcp/harbor
Verified official

One Million Tools MCP

v0.1.0

io.github.lucas-project/one-million-tools

42 free deterministic utilities: JSON, CSV, YAML, encoding, hashing, JWT, cron, formatters, CSS.

transport:streamable-http tools:42
Website

Target client

run in your project directory 

claude mcp add --transport http one-million-tools https://tools-empire-mcp.lucas-qin-au.workers.dev/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

json_format

json format

json_minify

json minify

json_validate

json validate

json_diff

json diff

json_to_yaml

json to yaml

yaml_to_json

yaml to json

json_to_csv

json to csv

csv_to_json

csv to json

base64_encode

base64 encode

base64_decode

base64 decode

url_encode

url encode

url_decode

url decode

sha256_hash

sha256 hash

hash_text

hash text

uuid_generate

uuid generate

regex_test

regex test

unix_timestamp_convert

unix timestamp convert

jwt_decode

jwt decode

sql_format

sql format

html_format

html format

css_format

css format

js_format

js format

yaml_format

yaml format

cron_explain

cron explain

env_redact

env redact

csv_parse

csv parse

csv_sort

csv sort

csv_filter

csv filter

csv_split

csv split

csv_statistics

csv statistics

text_diff

text diff

markdown_format

markdown format

markdown_to_html

markdown to html

markdown_preview

markdown preview

slug_generate

slug generate

meta_tags_generate

meta tags generate

og_preview_build

og preview build

color_convert

color convert

css_gradient_build

css gradient build

css_border_radius_build

css border radius build

css_box_shadow_build

css box shadow build

css_contrast_check

css contrast check

All 42 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.