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Best practices for REST API error responses following RFC 7807 Problem Details.

Calculate theoretical protein charge at given pH values

Validate multiple data types in one place — credit cards, VAT, IBAN, domains, URLs

Validate multiple data types in one place — credit cards, VAT, IBAN, domains, URLs. Built for AI agents.

Score information asset criticality from business impact data

Generate Fibonacci sequences, get Nth term, check if a number is Fibonacci, and explore φ.

Analyze and score outbound sequence analyzer data for actionable business insights

Sacred Texts Guide data API — search, random, bulk endpoints.

Convert times between 30+ world timezones instantly.

Look up Japanese kanji meanings, readings, stroke count, JLPT level, and usage examples.

Suggest accessible color alternatives meeting WCAG standards

Score character screen time distribution from script data

Calculate design system spacing scales from base unit

Score supplement evidence quality from clinical trial data

Extract key terms and obligations from terms of service documents

Generate random test data — people, companies, addresses, credit cards and colors

Generate random test data — people, companies, addresses, credit cards and colors. Built for AI agents.

https://oracle-production-d5ba.up.railway.app/launches/:mint

Live wind data data for agents and LLMs.

Live wind data data for agents and LLMs.

https://api.getsly.ai/x402/demo/test

https://stableenrich.dev/api/whitepages/person-search

Analyzes and processes web diff tracker data — optimized for agents, LLMs, and MCP pipelines.

Rate DeFi protocol revenue quality from fees, incentives, concentration, and retention

Generate SEO meta, OG, Twitter Cards & Schema JSON-LD—HTML output with SEO scoring.

Get country info including population, languages, currencies, and neighbors.