Search open-license D&D monsters across many sourcebooks by keyword (param q). Query: ?q= Returns JSON.

Search open-license D&D races by keyword with ability increases, speed and size (param q). Query: ?q= Returns JSON.

Search Open5e's D&D 5e rules-reference sections by keyword {q}, returning rules text. Query: ?q= Returns JSON.

Look up which spells a D&D 5e class can cast by class name {q} from Open5e. Query: ?q= Returns JSON.

Search open-license D&D spells by keyword with level, school and classes (param q). Query: ?q= Returns JSON.

Search open-license D&D weapons by keyword with category and damage (param q). Query: ?q= Returns JSON.

Searches OpenAlex for scholarly authors matching q, returning names and work counts. Query: ?q= Returns JSON.

Searches OpenAlex research concepts for q, returning concept names and hierarchy levels. Query: ?q= Returns JSON.

Searches OpenAlex for research institutions matching q, returning names and country codes. Query: ?q= Returns JSON.

Searches OpenAlex for journals and sources matching q, returning names and host organizations. Query: ?q= Returns JSON.

Searches OpenAlex scholarly works for q, returning titles and publication years. Query: ?q= Returns JSON.

Search Open Beauty Facts for cosmetic products in category {q}, returning product records. Query: ?q= Returns JSON.

OpenDota API: gold-per-minute percentile benchmark distribution for a hero, by hero_id param. Query: ?hero_id= Returns JSON.

OpenDota API: top-ranked players on a given hero with account, persona, rank tier and score, by hero_id param. Query: ?hero_id= Returns JSON.

Complete Dota 2 hero list with primary attribute, attack type and roles; no params. Returns JSON.

Recent professional Dota 2 matches older than match id {q}, with teams and league. Query: ?q= Returns JSON.

Ranked Dota 2 professional teams with Elo rating and win/loss records; no params. Returns JSON.

FDA Center for Veterinary Medicine adverse-event reports for animal drugs (param q = search expression, e.g. animal.species:Dog). Query: ?q= Returns JSON.

Search the openFDA GSRS substance dataset for substance {q}, returning UNII substance records. Query: ?q= Returns JSON.

Returns Open Food Facts product details for a barcode q, including name, brands and categories. Query: ?q= Returns JSON.

Directory of leagues and seasons available in OpenLigaDB. No params. Returns JSON.

OpenLigaDB Bundesliga (bl1) full match list by season year: home and away teams with kickoff date. Query: ?season= Returns JSON.

Search Open Pet Food Facts for pet-food products in category {q}, returning product records. Query: ?q= Returns JSON.

All Open Trivia Database question categories with ids (no params). Returns JSON.

Multiple-choice/boolean trivia questions with answers from the Open Trivia Database. Param amount is the number of questions. Query: ?amount= Returns JSON.

Searches openly-licensed audio across Openverse for the query q, returning titles and creators. Query: ?q= Returns JSON.

Searches openly-licensed images across Openverse for the query q, returning titles, creators and urls. Query: ?q= Returns JSON.

Locations, address and capacity of every Oslo City Bike (Bysykkel) station in Oslo, Norway; no params. Returns JSON.

Live bikes and open docks at every Oslo City Bike (Bysykkel) station in Oslo, Norway; no params. Returns JSON.

Directory of every Old School RuneScape Grand Exchange item with buy-limit, alch values and examine text; no params. Returns JSON.

Paris, France (Velib Metropole, Smovengo GBFS) live docking-station locations — station name, capacity and coordinates for the full network. Param q reserved (returns all stations). Query: ?q= Returns JSON.

Latest resident patent applications filed across every country. Returns JSON.

Search PeeringDB colocation facilities (operator, network count) by name {q}. Query: ?q= Returns JSON.

Search PeeringDB Internet Exchange Points (city, country) by name {q}. Query: ?q= Returns JSON.

Search PeeringDB networks (ASN, website, type) by network name {q}. Query: ?q= Returns JSON.

Live roster of every astronaut currently in space and their spacecraft from Open Notify; no params. Returns JSON.

Search sample cohorts used in the Polygenic Score Catalog by query {q}. Query: ?q= Returns JSON.

Search the Polygenic Score (PGS) Catalog for traits with associated scores by term {q}. Query: ?q= Returns JSON.

Philadelphia (Indego, B-cycle) live docking-station locations — station name, address and coordinates for the whole network. Param q reserved (returns all stations). Query: ?q= Returns JSON.

Latest number of physicians per 1,000 people across every country. Returns JSON.

Latest mean annual PM2.5 air pollution exposure in micrograms per cubic meter across every country. Returns JSON.

Locations and details of every POGOH docking station in Pittsburgh, Pennsylvania; live station directory, no params. Returns JSON.

Live bikes available and open docks at every POGOH station in Pittsburgh, Pennsylvania, updated in real time; no params. Returns JSON.

Effect text and Pokemon that have an ability (param name). Query: ?name= Returns JSON.

Growth time, harvest, size and flavor of a Pokemon berry (param name). Query: ?name= Returns JSON.

Highest-stat characteristic phrase shown for a Pokemon by its IV gene value (param id). Query: ?id= Returns JSON.

Berry flavor associated with a Pokemon contest type (param name). Query: ?name= Returns JSON.

Species that belong to a breeding egg group (param name). Query: ?name= Returns JSON.

Ordering of a wild Pokemon encounter method like walk or surf (param name). Query: ?name= Returns JSON.

Base species and evolutions in a Pokemon evolution chain (param id). Query: ?id= Returns JSON.