# Fun API Playground

> No-signup, browser-based mock REST API playground at https://funapi.dev.
> 39 themed mock APIs exposing 337 endpoints that behave like real
> servers — CRUD, pagination, filtering, Bearer/JWT/OAuth auth, optimistic
> concurrency, idempotency keys, rate limiting, webhooks with HMAC
> signatures, GraphQL, and the full zoo of HTTP status codes.

Key facts:
- No signup required; the web playground runs the entire API engine client-side in the browser with zero backend.
- A live backend (Firebase Cloud Functions) also serves the same endpoints over the real network for testing with curl, Postman or a test suite.
- Bearer tokens: `qa-admin-token` (full access), `qa-viewer-token` (read + write, DELETE returns 403), anything else returns 401.
- Every docs page ships Swagger-style interactive docs with a "Try it out" panel and ready-to-copy curl/fetch/Python/HTTPie snippets.
- OpenAPI 3.1 and Postman collection export are available from every docs page.
- Requests are isolated by `X-Sandbox-ID`; reset sandbox data from any docs page or via `POST /api/_reset`.
- A GraphQL endpoint is served at `POST https://funapi.dev/graphql`, with a GraphiQL UI at the same URL. It is excluded from crawling in robots.txt (it is an interactive IDE, not a document), so it is listed here as an endpoint rather than a page.

Full text: every page below, as plain text in one file, at https://funapi.dev/llms-full.txt
Blog full text: every published article, as plain text, at https://funapi.dev/llms-blog.txt
OpenAPI: the whole catalog as one OpenAPI 3.1 document at https://funapi.dev/openapi.json, and one
document per API at https://funapi.dev/docs/{api-id}/openapi.json. Both are generated from the same
catalog the docs pages render, so the spec and the documentation cannot describe different APIs.
Every page also declares these files with <link rel="alternate"> and <link rel="service-desc"> in
its head.

## Pages

- [Home](https://funapi.dev/): the API catalog with search and category filters.
- [Getting started guide](https://funapi.dev/guide): auth, pagination, idempotency and optimistic concurrency in 5 minutes.
- [About](https://funapi.dev/about): what the playground is, how the browser engine and the live backend differ, what is real behaviour and what is invented data, and how caller data is isolated.
- [Challenges](https://funapi.dev/challenges): 23 hands-on API testing exercises in 7 groups, each one verified against the response your request actually produced.
- [Tools](https://funapi.dev/tools): three utilities that run entirely in the browser and upload nothing — a curl-to-code converter covering nine languages, a JWT decoder, and an HMAC webhook signature verifier.
- [Glossary](https://funapi.dev/glossary): short definitions of the concepts the APIs exercise — idempotency, ETags, HATEOAS, HMAC signatures, cursor pagination and the rest.
- [Comparisons](https://funapi.dev/compare): how this playground differs from JSONPlaceholder, httpbin, reqres and the other free mock APIs.
- [Blog](https://funapi.dev/blog): practical API testing guides and patterns.
- API docs (https://funapi.dev/docs/{api-id}): 39 pages, one per themed mock API. Every one is listed by URL under "API docs, in full" below — a map that gives you a pattern instead of addresses is not a map.
- [HTTP status codes](https://funapi.dev/status): index of every status code the playground returns on demand; each `https://funapi.dev/status/{code}` page explains the code, why you would provoke it, and lists the endpoints that return it.
- [Testing techniques](https://funapi.dev/testing): 8 hands-on guides at `https://funapi.dev/testing/{slug}` — pagination, rate-limiting, idempotency, optimistic-concurrency, webhook-signatures, auth-tokens, negative-testing, async-jobs.
- Categories (https://funapi.dev/category/{slug}): fandom, everyday-life, original-worlds, testing-scenarios.

## Languages

The site is published in English at the bare paths. The glossary is also
published in Turkish under `/tr`, e.g. https://funapi.dev/tr/glossary and
https://funapi.dev/tr/glossary/etag. Every localized page carries a reciprocal
hreflang cluster with the English original as `x-default`. Other sections are
English-only for now.

## API docs, in full

The list below is generated at build time from the catalog, so it is every API
that exists and no API that does not.

- [Friends API](https://funapi.dev/docs/friends) — Characters, episodes & quotes from the coffee-house gang. 14 endpoints, base `/friends/v1`, spec at https://funapi.dev/docs/friends/openapi.json
- [Superhero API](https://funapi.dev/docs/superhero) — Heroes, powers & nemeses. Great for nested resources. 6 endpoints, base `/superheroes/v1`, spec at https://funapi.dev/docs/superhero/openapi.json
- [Pizza Orders API](https://funapi.dev/docs/pizza) — Place & track orders. Includes a guaranteed 500. 9 endpoints, base `/pizza/v1`, spec at https://funapi.dev/docs/pizza/openapi.json
- [Coffee Shop API](https://funapi.dev/docs/coffee) — Drinks & orders. Home of the legendary 418. 6 endpoints, base `/coffee/v1`, spec at https://funapi.dev/docs/coffee/openapi.json
- [Football API](https://funapi.dev/docs/football) — Teams, squads, standings & simulated matches. 7 endpoints, base `/football/v1`, spec at https://funapi.dev/docs/football/openapi.json
- [Movies API](https://funapi.dev/docs/movies) — QA-themed cinema. Sort, filter, rate. 9 endpoints, base `/movies/v1`, spec at https://funapi.dev/docs/movies/openapi.json
- [Harry Potter API](https://funapi.dev/docs/wizarding) — Houses, students & spells from a magic school. 10 endpoints, base `/wizarding/v1`, spec at https://funapi.dev/docs/wizarding/openapi.json
- [Star Wars API](https://funapi.dev/docs/galaxy) — Characters, planets & starships from a galaxy far away. 11 endpoints, base `/galaxy/v1`, spec at https://funapi.dev/docs/galaxy/openapi.json
- [Sherlock Holmes API](https://funapi.dev/docs/holmes) — Cases, suspects & clues from Baker Street. 10 endpoints, base `/holmes/v1`, spec at https://funapi.dev/docs/holmes/openapi.json
- [Pokémon API](https://funapi.dev/docs/pokemon) — Creatures, trainers & simulated battles. 10 endpoints, base `/pokemon/v1`, spec at https://funapi.dev/docs/pokemon/openapi.json
- [Middle-earth API](https://funapi.dev/docs/middleearth) — Fellowship, quests & artifacts from a fantasy realm. 9 endpoints, base `/middleearth/v1`, spec at https://funapi.dev/docs/middleearth/openapi.json
- [Auth Playground API](https://funapi.dev/docs/auth) — OAuth 2.0 flows — client credentials, auth code, refresh & expiry. 6 endpoints, base `/auth/v1`, spec at https://funapi.dev/docs/auth/openapi.json
- [Webhooks API](https://funapi.dev/docs/webhooks) — Register callbacks, trigger events, inspect & replay deliveries. 7 endpoints, base `/webhooks/v1`, spec at https://funapi.dev/docs/webhooks/openapi.json
- [The Office API](https://funapi.dev/docs/theoffice) — Employees, pranks & quotes from a paper company. 8 endpoints, base `/office/v1`, spec at https://funapi.dev/docs/theoffice/openapi.json
- [Dino Park API](https://funapi.dev/docs/dinopark) — Dinosaurs, enclosures & the occasional breach. 9 endpoints, base `/dinopark/v1`, spec at https://funapi.dev/docs/dinopark/openapi.json
- [Marvel API](https://funapi.dev/docs/marvel) — Avengers, villains & mission assignments. 10 endpoints, base `/marvel/v1`, spec at https://funapi.dev/docs/marvel/openapi.json
- [Game of Thrones API](https://funapi.dev/docs/got) — Houses, nobles & dragons of Westeros. 12 endpoints, base `/got/v1`, spec at https://funapi.dev/docs/got/openapi.json
- [Rick and Morty API](https://funapi.dev/docs/rickandmorty) — Characters, locations & episodes across the multiverse. 9 endpoints, base `/rickandmorty/v1`, spec at https://funapi.dev/docs/rickandmorty/openapi.json
- [Bank API](https://funapi.dev/docs/bank) — Accounts, transfers & cursor pagination. Home of the 402. 9 endpoints, base `/bank/v1`, spec at https://funapi.dev/docs/bank/openapi.json
- [Airline API](https://funapi.dev/docs/airline) — Flights, seat conflicts & overbooking drama. 9 endpoints, base `/airline/v1`, spec at https://funapi.dev/docs/airline/openapi.json
- [Protocol Lab API](https://funapi.dev/docs/protocol) — Async jobs, redirects, 503/504, JSON Patch & content negotiation. 12 endpoints, base `/protocol/v1`, spec at https://funapi.dev/docs/protocol/openapi.json
- [Shop API](https://funapi.dev/docs/shop) — Carts, stock drama & expired coupons. 9 endpoints, base `/shop/v1`, spec at https://funapi.dev/docs/shop/openapi.json
- [Cargo Tracking API](https://funapi.dev/docs/cargo) — Shipment state machines. Writes need an X-API-Key. 9 endpoints, base `/cargo/v1`, spec at https://funapi.dev/docs/cargo/openapi.json
- [Space Agency API](https://funapi.dev/docs/space) — Launches, scrubs & probes with real signal lag. 9 endpoints, base `/space/v1`, spec at https://funapi.dev/docs/space/openapi.json
- [Starfleet API](https://funapi.dev/docs/starfleet) — Ships, warp limits & exponentially multiplying tribbles. 10 endpoints, base `/starfleet/v1`, spec at https://funapi.dev/docs/starfleet/openapi.json
- [World Cup 2026 API](https://funapi.dev/docs/worldcup) — Teams, groups, venues, match simulation, tickets & bracket predictions across the 2026 host cities. 17 endpoints, base `/worldcup/v1`, spec at https://funapi.dev/docs/worldcup/openapi.json
- [FIBA World Cup API](https://funapi.dev/docs/fiba) — Teams, Doha arenas, quarter-by-quarter game simulation, box scores, coach challenges, cursor-paged play-by-play & ticketing. 22 endpoints, base `/fiba/v1`, spec at https://funapi.dev/docs/fiba/openapi.json
- [GTA API](https://funapi.dev/docs/gta) — Characters, vehicles, weapons, missions, heists, a wanted system & radio stations across Los Santos, Vice City and Liberty City. 17 endpoints, base `/gta/v1`, spec at https://funapi.dev/docs/gta/openapi.json
- [Dragon Ball API](https://funapi.dev/docs/dragonball) — Fighters, transformations, power levels & tournaments. 6 endpoints, base `/dragonball/v1`, spec at https://funapi.dev/docs/dragonball/openapi.json
- [Formula 1 API](https://funapi.dev/docs/formula1) — Drivers, constructors, races, telemetry & pit stops. 7 endpoints, base `/formula1/v1`, spec at https://funapi.dev/docs/formula1/openapi.json
- [Voxel Worlds API](https://funapi.dev/docs/voxel) — Block worlds, players, inventories & coordinates. 6 endpoints, base `/voxel/v1`, spec at https://funapi.dev/docs/voxel/openapi.json
- [Anime Tournament API](https://funapi.dev/docs/anime) — Original fighters, power levels & tournament brackets. 5 endpoints, base `/anime/v1`, spec at https://funapi.dev/docs/anime/openapi.json
- [Retro Quest API](https://funapi.dev/docs/retroquest) — Pixel heroes, quests, loot & save-game conflicts. 5 endpoints, base `/retro/v1`, spec at https://funapi.dev/docs/retroquest/openapi.json
- [Object Storage API](https://funapi.dev/docs/storage) — Objects, checksums, ranges & resumable uploads. 4 endpoints, base `/storage/v1`, spec at https://funapi.dev/docs/storage/openapi.json
- [Modern Identity API](https://funapi.dev/docs/identity) — OIDC discovery, PKCE, device codes & token lifecycle. 6 endpoints, base `/identity/v1`, spec at https://funapi.dev/docs/identity/openapi.json
- [Event Streams API](https://funapi.dev/docs/streams) — SSE events, replay cursors, heartbeats & ordering. 3 endpoints, base `/streams/v1`, spec at https://funapi.dev/docs/streams/openapi.json
- [Fault Injection API](https://funapi.dev/docs/faults) — Latency, status codes, malformed payloads & flaky responses. 4 endpoints, base `/faults/v1`, spec at https://funapi.dev/docs/faults/openapi.json
- [Search & Facets API](https://funapi.dev/docs/searchlab) — Full-text queries, facets, highlights & cursor pagination. 2 endpoints, base `/search/v1`, spec at https://funapi.dev/docs/searchlab/openapi.json
- [Fun Data Bridge API](https://funapi.dev/docs/datagen) — Seeded fixtures from schemas, inspired by fundata.dev. 4 endpoints, base `/data/v1`, spec at https://funapi.dev/docs/datagen/openapi.json

## Related

- [Fun UI Playground](https://funui.dev): sibling site for practicing UI test automation.
- [Fun Data Playground](https://fundata.dev): sibling site generating synthetic test data.