Cold email optimization: subject lines, personalization hooks, sequence cadence and reply rate benchmarks.

Generate personalized cold emails instantly — built for AI sales agents

Agent-ready cold outreach generation, optimization and execution workflows

Agent-ready cold outreach generation, optimization and execution workflows

Generate personalized cold emails and LinkedIn messages for any company, role and sales goal.

Cold storage guide for crypto — hardware wallets, air-gapped computers and paper wallet setup.

Cold War API — intelligence and analytics for AI agents.

Cold War Guide data API with random, search, and bulk endpoints.

Cold War History data API — search, random, bulk endpoints.

Cold War intelligence: nuclear arms race, proxy conflicts, intelligence operations, diplomatic crises and key documents.

Score collaborative robot safety zone configurations

Score securitization collateral pool quality metrics

Calculate DeFi collateralization ratios and liquidation prices

Score collectible investment grade from condition and rarity

Collectibles intelligence: price guides for sports cards, coins, stamps, comics, grading impact on value, auction result

Collecting Intel API — intelligence and analytics for AI agents.

Score library collection development policy quality

Score museum collection diversity across cultural and geographic

Calculate recycling collection rates from program data

Prioritize collections outreach from invoice age, amount, relationship, dispute, and payment likelihood

Score collective action problem features from coordination data

Collective Behavior data API with random, search, and bulk endpoints.

Score collective impact backbone organization effectiveness

Live college admission intel data and intelligence for agents and automated workflows

College application: chance calculator, essay guidance, deadline tracker, activity list optimization and early decision

Calculate 529 plan projections and college savings goals. Built for AI financial planning agents.

College Savings API — intelligence and analytics for AI agents.

College savings: 529 plan comparison, state tax benefits, financial aid impact, ESA vs 529 and savings targets.

College Savings Calculator

Calculate and optimize college savings v2 with actionable recommendations

Calculate collision avoidance maneuver delta-v requirements

Score robot collision risk from path and environment data

Colonial History API — intelligence and analytics for AI agents.

Colonialism History data API with random, search, and bulk endpoints.

Check WCAG color contrast ratios, suggest accessible colors, and simulate color blindness.

Suggest accessible color alternatives meeting WCAG standards

Simulate how colors appear to users with protanopia, deuteranopia, and tritanopia.

Simulate color blind perception for color palette inputs

Simulate how colors appear to people with 7 types of color blindness using the Brettel model.

Validate and convert color codes for agents between HEX, RGB, HSL formats

Validate CSS color codes HEX RGB HSL and named colors

Calculate and assess color contrast checker with actionable recommendations

Check WCAG contrast ratio between foreground and background colors

Calculate WCAG contrast ratio between two colors with AA and AAA compliance check.

Convert between HEX, RGB, HSL, CMYK color formats

Convert between HEX RGB HSL CMYK color formats

Convert colors between HEX RGB HSL HSV CMYK and CSS names

Convert between HEX, RGB, and HSL color formats instantly.

Convert colors between HEX, RGB and HSL formats with CSS color name hints. Built for AI design agents.

Convert colors between HEX, RGB and HSL formats with CSS output.