One Million Tools

by lucas-project · remote · no sign-in to list tools · v0.1.0 · published by GitHub user lucas-project

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

Changes · 36

Compare Registry entry

42 tools: 36 change things and 6 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things36Claude Code: ask: see these tools
Only reads6Claude Code: allow: see these tools

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

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

Tools

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

42 tools

Changes things 36Creates or changes something that can be changed back.Claude Code: ask

base64_decodeBase64 string → UTF-8 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
Base64 string → UTF-8 text.
base64_encodeUTF-8 text → Base64 string.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
UTF-8 text → Base64 string.
color_convertConvert a HEX color into RGB / HSL / HSV / CSS forms.No findings
Why it is in this group
- The name "color_convert" says "convert": a word for a change.
Description, as the server wrote it
Convert a HEX color into RGB / HSL / HSV / CSS forms.
css_border_radius_buildBuild a CSS border-radius value from four corner radii in px.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
Build a CSS border-radius value from four corner radii in px.
css_box_shadow_buildBuild a CSS box-shadow value from one or more layers.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
Build a CSS box-shadow value from one or more layers.
css_contrast_checkCompute the WCAG contrast ratio between two colors and the AA/AAA verdict.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
Compute the WCAG contrast ratio between two colors and the AA/AAA verdict.
css_formatPretty-print CSS.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
Pretty-print CSS.
css_gradient_buildBuild a CSS linear-gradient string from color stops + angle.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
Build a CSS linear-gradient string from color stops + angle.
csv_filterFilter CSV rows by a column predicate (equals / contains / regex / gt / gte / lt / lte / not-empty).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
Filter CSV rows by a column predicate (equals / contains / regex / gt / gte / lt / lte / not-empty).
csv_parseParse CSV text into fields + preview rows with delimiter detection.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
Parse CSV text into fields + preview rows with delimiter detection.
csv_sortSort CSV rows by one column (alpha or numeric).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
Sort CSV rows by one column (alpha or numeric).
csv_splitSplit a CSV into N chunks or into files of N rows each.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
Split a CSV into N chunks or into files of N rows each.
csv_statisticsCompute per-column summary statistics (count, min, max, mean, median) over a CSV.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
Compute per-column summary statistics (count, min, max, mean, median) over a CSV.
csv_to_jsonParse CSV text into a JSON array of objects.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
Parse CSV text into a JSON array of objects.
env_redactRedact secrets (API keys, tokens, passwords) from logs / config / env 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
Redact secrets (API keys, tokens, passwords) from logs / config / env text.
hash_textCompute a SHA-1 / SHA-256 / SHA-512 hex digest of UTF-8 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
Compute a SHA-1 / SHA-256 / SHA-512 hex digest of UTF-8 text.
html_formatPretty-print HTML.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
Pretty-print HTML.
js_formatPretty-print JavaScript / TypeScript with Prettier.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
Pretty-print JavaScript / TypeScript with Prettier.
json_formatPretty-print JSON with configurable indentation (2 spaces, 4 spaces, or tab).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
Pretty-print JSON with configurable indentation (2 spaces, 4 spaces, or tab).
json_minifyCompress JSON by stripping whitespace.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
Compress JSON by stripping whitespace.
json_to_csvConvert an array of JSON objects to CSV.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
Convert an array of JSON objects to CSV.
json_to_yamlConvert JSON to YAML.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
Convert JSON to YAML.
jwt_decodeDecode a JWT header + payload.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
Decode a JWT header + payload. Does not verify the signature.
markdown_formatNormalize Markdown (list markers, trailing whitespace, blank lines).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
Normalize Markdown (list markers, trailing whitespace, blank lines).
markdown_to_htmlConvert Markdown to HTML.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
Convert Markdown to HTML.
meta_tags_generateGenerate <title>, description, Open Graph and Twitter Card tags for a page.No findings
Why it is in this group
- The name "meta_tags_generate" says "generate": a word for a change.
Description, as the server wrote it
Generate <title>, description, Open Graph and Twitter Card tags for a page.
regex_testTest a regular expression against input text and return matches with capture groups.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
Test a regular expression against input text and return matches with capture groups.
sha256_hashCompute a SHA-256 hex digest of UTF-8 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
Compute a SHA-256 hex digest of UTF-8 text.
slug_generateGenerate a URL slug from a string.No findings
Why it is in this group
- The name "slug_generate" says "generate": a word for a change.
Description, as the server wrote it
Generate a URL slug from a string.
sql_formatPretty-print SQL.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
Pretty-print SQL.
unix_timestamp_convertConvert a Unix timestamp (seconds or ms) to an ISO 8601 date string.No findings
Why it is in this group
- The name "unix_timestamp_convert" says "convert": a word for a change.
Description, as the server wrote it
Convert a Unix timestamp (seconds or ms) to an ISO 8601 date string.
url_decodeDecode percent-encoded URL 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
Decode percent-encoded URL text.
url_encodePercent-encode a string (component or full URI mode).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
Percent-encode a string (component or full URI mode).
uuid_generateGenerate RFC 4122 v4 UUIDs.No findings
Why it is in this group
- The name "uuid_generate" says "generate": a word for a change.
Description, as the server wrote it
Generate RFC 4122 v4 UUIDs.
yaml_formatPretty-print YAML.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
Pretty-print YAML.
yaml_to_jsonConvert YAML to pretty-printed JSON.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
Convert YAML to pretty-printed JSON.

Only reads 6Looks things up and changes nothing.Claude Code: allow

cron_explainExplain a cron expression in plain English.No findings
Why it is in this group
- The name "cron_explain" says "explain": a word for reading.
Description, as the server wrote it
Explain a cron expression in plain English.
json_diffDiff two JSON documents and return added/removed/changed keys.No findings
Why it is in this group
- The name "json_diff" says "diff": a word for reading.
Description, as the server wrote it
Diff two JSON documents and return added/removed/changed keys.
json_validateValidate JSON syntax and return the parsed value or a line/column error.No findings
Why it is in this group
- The name "json_validate" says "validate": a word for reading.
Description, as the server wrote it
Validate JSON syntax and return the parsed value or a line/column error.
markdown_previewRender Markdown to an HTML preview fragment with word/char counts.No findings
Why it is in this group
- The name "markdown_preview" says "preview": a word for reading.
Description, as the server wrote it
Render Markdown to an HTML preview fragment with word/char counts.
og_preview_buildBuild an Open Graph preview metadata bundle (title / description / domain truncation).No findings
Why it is in this group
- The name "og_preview_build" says "preview": a word for reading.
Description, as the server wrote it
Build an Open Graph preview metadata bundle (title / description / domain truncation).
text_diffDiff two texts and return part-level changes plus a unified string.No findings
Why it is in this group
- The name "text_diff" says "diff": a word for reading.
Description, as the server wrote it
Diff two texts and return part-level changes plus a unified string.

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

claude mcp add --transport http one-million-tools https://tools-empire-mcp.lucas-qin-au.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__one-million-tools__json_validate",
      "mcp__one-million-tools__json_diff",
      "mcp__one-million-tools__cron_explain",
      "mcp__one-million-tools__text_diff",
      "mcp__one-million-tools__markdown_preview",
      "mcp__one-million-tools__og_preview_build"
    ],
    "ask": [
      "mcp__one-million-tools__json_format",
      "mcp__one-million-tools__json_minify",
      "mcp__one-million-tools__json_to_yaml",
      "mcp__one-million-tools__yaml_to_json",
      "mcp__one-million-tools__json_to_csv",
      "mcp__one-million-tools__csv_to_json",
      "mcp__one-million-tools__base64_encode",
      "mcp__one-million-tools__base64_decode",
      "mcp__one-million-tools__url_encode",
      "mcp__one-million-tools__url_decode",
      "mcp__one-million-tools__sha256_hash",
      "mcp__one-million-tools__hash_text",
      "mcp__one-million-tools__uuid_generate",
      "mcp__one-million-tools__regex_test",
      "mcp__one-million-tools__unix_timestamp_convert",
      "mcp__one-million-tools__jwt_decode",
      "mcp__one-million-tools__sql_format",
      "mcp__one-million-tools__html_format",
      "mcp__one-million-tools__css_format",
      "mcp__one-million-tools__js_format",
      "mcp__one-million-tools__yaml_format",
      "mcp__one-million-tools__env_redact",
      "mcp__one-million-tools__csv_parse",
      "mcp__one-million-tools__csv_sort",
      "mcp__one-million-tools__csv_filter",
      "mcp__one-million-tools__csv_split",
      "mcp__one-million-tools__csv_statistics",
      "mcp__one-million-tools__markdown_format",
      "mcp__one-million-tools__markdown_to_html",
      "mcp__one-million-tools__slug_generate",
      "mcp__one-million-tools__meta_tags_generate",
      "mcp__one-million-tools__color_convert",
      "mcp__one-million-tools__css_gradient_build",
      "mcp__one-million-tools__css_border_radius_build",
      "mcp__one-million-tools__css_box_shadow_build",
      "mcp__one-million-tools__css_contrast_check"
    ],
    "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 one-million-tools. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.lucas-project/one-million-tools/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

36 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 18:38 UTC.

For agents: Markdown · JSON · report this listing