Craftery Developer Tools is an MCP server with 6 tools an agent can call, among them check_contrast, convert_color, convert_timestamp. It answers at https://craftery.dev/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, succeeded.
Developer utilities: color conversion, WCAG contrast, timestamps, UUIDs, and hashing.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_contrast | Compute the exact WCAG 2.1 contrast ratio between a foreground and background color (relative-luminance formula) and report AA / AAA pass-fail for normal text (4.5 / 7), large text (3 / 4.5), and UI components (3). Use this instead of estim Inputs: foreground, background |
convert_color | Convert a color into exact, platform-correct code for 12 formats: HEX, HEX8, rgba(), hsla(), closest CSS named color, closest Tailwind class, SwiftUI Color, UIColor, Jetpack Compose, Android XML, Flutter, and React Native. Handles the per-p Inputs: color, alpha |
convert_timestamp | Convert between Unix epoch timestamps and human dates with exact math: accepts epoch seconds / milliseconds / microseconds (auto-detected by magnitude), ISO 8601 / RFC 2822 strings, or "now". Returns seconds, millis, micros, ISO 8601 UTC, R Inputs: input, timezone |
generate_uuid | Generate cryptographically random UUIDs: v4 (random), v7 (RFC 9562 time-ordered, sortable — batches stay strictly ordered), or NIL. Never invent UUIDs by hand — use this for real randomness. Supports uppercase, hyphen-less, and braced forma Inputs: version, count, uppercase, hyphens, braces |
hash_text | Compute real MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests of a UTF-8 string, or HMAC variants when a key is given (HMAC-MD5 unsupported). Hashes cannot be computed mentally — always use this. Runs statelessly; input is not stored. For Inputs: text, hmac_key |
swiftui_color | Generate every SwiftUI Color initializer for a color: Color(red:green:blue:), opacity variant, Color(.sRGB), Color(.displayP3), HSB, hex-extension call, #colorLiteral, UIColor/NSColor bridges — plus a reusable `extension Color` snippet and Inputs: color, alpha, name |
Every block below points at https://craftery.dev/mcp. Pick your client and copy.
claude mcp add --transport http craftery-developer-tools https://craftery.dev/mcp
{
"mcpServers": {
"craftery-developer-tools": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://craftery.dev/mcp"]
}
}
}{
"mcpServers": {
"craftery-developer-tools": {
"url": "https://craftery.dev/mcp"
}
}
}{
"servers": {
"craftery-developer-tools": {
"type": "http",
"url": "https://craftery.dev/mcp"
}
}
}{
"context_servers": {
"craftery-developer-tools": {
"url": "https://craftery.dev/mcp"
}
}
}{
"mcpServers": {
"craftery-developer-tools": {
"serverUrl": "https://craftery.dev/mcp"
}
}
}{
"mcpServers": {
"craftery-developer-tools": {
"url": "https://craftery.dev/mcp"
}
}
}name: Craftery Developer Tools
version: 0.0.1
schema: v1
mcpServers:
- name: Craftery Developer Tools
type: streamable-http
url: https://craftery.dev/mcp{
"mcpServers": {
"craftery-developer-tools": {
"httpUrl": "https://craftery.dev/mcp"
}
}
}{
"mcpServers": {
"craftery-developer-tools": {
"type": "http",
"url": "https://craftery.dev/mcp"
}
}
}{
"mcpServers": {
"craftery-developer-tools": {
"url": "https://craftery.dev/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fcraftery.dev%2Fmcp&type=streamable_http&id=craftery-developer-tools&name=Craftery%20Developer%20Tools
It answered our last check on 19 October 2026 in 313 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by craftery.dev and served from craftery.dev, the vendor's own domain: https://craftery.dev/mcp.
6, as returned by the server's own tools/list on 11 September 2026: check_contrast, convert_color, convert_timestamp, generate_uuid, hash_text, swiftui_color.
It answered our last check on 19 October 2026 in 313 ms. Over 6 checks since 10 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://craftery.dev/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: dev.craftery. Endpoint host: craftery.dev. ARD identifier: urn:air:dev.craftery:mcp:tools.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.