Exchange Rate looks up the conversion rate between two currency codes. It returns the current forex rate and last-updated timestamp across 170+ supported currencies, in USD or any other base; paid plans add the inverse rate.

Exercises filters movements by target muscle group, equipment, and exercise name, returning matching exercises with their force type and required gear. Paid plans add step-by-step instructions, difficulty levels, and movement mechanics.

Face Detector is a face detection API that analyzes an image and reports whether it contains human faces. Paid plans add the face count and bounding box coordinates with a confidence score for each detected face.

Fibonacci Generator computes Fibonacci numbers and sequences based on a target count or ceiling value. Each response provides the generated sequence starting from any position, total sum, step ratios, and a golden ratio approximation.

File Size Formatter converts raw byte counts into human-readable file size strings. Send a byte count with optional precision and unit settings to receive formatted labels, unit names, and scaled numeric values.

Fill in the Blanks Generator creates completion puzzles from idioms, proverbs, quotes, science facts, and geography trivia.

Financial Ratios returns the key profitability, liquidity, leverage, efficiency and cash-flow ratios for a US public company by ticker - margins, ROE, ROA, current ratio, debt-to-equity, interest coverage, asset turnover, FCF margin and more - all computed from SEC filing data.

Fortune Cookie Generator creates authentic fortune cookie messages including wisdom, predictions, advice, humor, and motivational quotes.

Fully Qualified Domain resolves an IP address to its fully qualified domain name using reverse DNS PTR records. It returns the host FQDN, base domain, TLD, subdomain, and domain level count.

Generate complete RPG-style characters with race, class, background, stats, and personality.

Gas Prices returns average retail gasoline, diesel and LPG prices from official weekly government surveys for the US, the UK, all 27 EU countries and the EU average. Pass a country, or a US state, region or city, to get the latest week with week-over-week and year-over-year changes, in any currency, per liter or per gallon.

Get GDP (Gross Domestic Product) data for any country including current values and historical data going back to 1960.

Gender Detector is a gender prediction API that estimates the likely gender of a person from their name. Pass a first name and get back the predicted gender as JSON, ready for salutations, profile defaults, or audience analysis.

Gibberish Detector analyzes text using bigram frequency and vowel ratios to identify nonsensical or randomly generated content.

Global Stock Market tracks share price indices across 36 countries using a normalized 2015 baseline. Send a two-letter country code to receive the latest market index value, baseline, and date.

Gold Price fetches real-time spot gold prices per troy ounce, gram, and kilogram. Each response includes the price update timestamp, 24-hour price change, and market direction, while paid plans add custom currencies and hourly history.

Grammar Check is a grammar checker and spell check API that inspects text for spelling and grammar errors, returning the corrected wording, error count, and a modified flag. Paid plans add detailed rule descriptions, character offsets, and suggestions for every detected mistake.

Gravatar Lookup fetches public Gravatar profiles and avatar image URLs for any email address. It returns the user's display name, username, biography, location, company, and job title.

GUID Generator is a GUID generator API that creates RFC 4122 version 4 GUIDs in standard, uppercase, hyphen-free, or brace-wrapped formats. Pass a count and formatting style to receive a batch of unique IDs matching your structural requirements.

Hangman Word Generator provides random hangman words for word games, with difficulty levels based on word length and, on paid plans, category filtering.