Developer Tools APIs

Color data API - convert between hex/RGB/HSL, get color names, and generate schemes

Check if an email domain is disposable/temporary - useful for anti-spam and signup validation

GitHub REST API - search repos, code, issues, users, and get repository metadata

Hacker News - top stories, new posts, comments, and full-text search via Algolia

Generate cryptographic hashes - MD5, SHA-1, SHA-256, and SHA-512 for any input

Compare two JSON documents and return structured diff results

NPM registry - search packages, get metadata, versions, dependencies, and download stats

Python Package Index - package metadata, versions, dependencies, and download files

Generate and decode QR codes - create QR images from text and read QR from images

Generate and decode QR codes with custom size and colors.

Fetch and parse robots.txt for any domain - check crawl rules and sitemaps

Rust package metadata, versions, downloads, and dependencies.

Stack Exchange API - search questions, answers, tags, and user reputation across Stack Overflow

Resolve shortened URLs (bit.ly, t.co, etc.) to their final destination

Generate UUID v1, v4, v5, and nil UUIDs.

Generate and decode UUIDs - v1, v4, v5, and nil UUIDs with timestamp extraction

Internet Archive Wayback Machine snapshots and availability.

Compare token costs across GPT-4o, Claude 3.5, Gemini and 30+ models. Batch estimation and budget forecasting.

Track AI spending across OpenAI, Anthropic, Google, Mistral and DeepSeek. Budgets, alerts, cost optimization.

Top-of-book bid and ask snapshots for approved crypto instruments from Blocksize. The verified direct shared bid/ask uni...

Real-time VWAP pricing for approved crypto markets from Blocksize. The verified direct VWAP universe includes 6,362 cryp...

Top-of-book bid and ask snapshots for approved equity instruments from Blocksize. We verified direct snapshots for AAPLU...

Spot FX pricing for supported Blocksize fiat pairs. We verified direct snapshots for EURUSD, and this listing should exp...

Discover supported Blocksize markets before making live requests. Verified direct coverage includes 6,362 crypto VWAP in...

Spot bid/ask pricing for approved Blocksize metals and commodity instruments. We verified direct snapshots for XAUUSD, X...

Automatic invoice reminder sequence generator for agents. Returns friendly, firm, and final overdue-invoice messages in ...

HEX/RGB/HSL/CMYK conversion, color harmonies (complementary, analogous, triadic), WCAG contrast checking, gradient gener...

Human-readable cron explanations, validation, next-N scheduled runs, natural language to cron generation. 5/6-field supp...

Real-time signals: SMA, RSI, MACD, Bollinger. Multi-timeframe analysis with buy/sell/hold for 100+ pairs.

FIFO/LIFO/Average cost basis. Multi-exchange, DeFi, staking. Tax brackets for US, UK, EU.

JSON/CSV/XML conversion, flatten, filter, sort, aggregate stats. Handles 10MB+ payloads.

LCS-based text diffing, unified patch generation, and patch apply. Compare up to 2000 lines per side at edge speed.

8-layer validation: MX, SPF, 550+ disposable domains, typo correction. Cuts bounce rates by 90%.

Names, emails, addresses, UUIDs, custom schemas. 10+ locales, batch up to 1000 records.

Country, city, coordinates, timezone, ISP, ASN. Sub-50ms from Cloudflare edge.

Auto-infer schemas, validate, generate TypeScript, create mock data, diff versions, produce docs.

The ONLY MCP for Korean financial data. KOSPI/KOSDAQ, stocks, exchange rates, Kimchi Premium, news.

Korean government data in English: weather, exchange rates, holidays, transport, stocks.

Validate Korean BRN with checksum, corporate registration numbers, and phone formats. English-friendly.

MD to HTML and back, TOC extraction, link extraction, linting. Perfect for doc pipelines.

No-auth HTTP and x402 service with crypto route scoring, Solana transaction/token analysis, Base transaction explanation...

Entropy, crack-time across 6 scenarios, 10K common password check. Drop-in zxcvbn alternative.

SVG and PNG placeholders, avatar initials, geometric patterns. Custom dimensions and colors.

URLs, vCards, WiFi, email, SMS. SVG and base64 PNG. Error correction L-H. Sub-100ms on edge.

Test, match, replace, split, validate, and get plain-English regex explanations.

Full-page SEO audit: meta tags, heading hierarchy, links, alt text, performance. Priority-ranked fixes.

Scan Solidity for 13 vulnerability patterns: reentrancy, overflow, access control. Fix suggestions included.

7 valuation methods (DCF, Berkus, Scorecard, VC, comparables) in one call. Investor-ready reports.

Detect 150+ technologies across 14 categories from any URL. CMS, frameworks, analytics, CDN, hosting, payments, security...

Sentiment, Flesch-Kincaid readability, keyword extraction, 50+ language detection. No ML needed.