Lists of no-auth public APIs are easy to find and mostly untested — entries survive on them for years after the service dies. This page is the other kind: every endpoint below is actually requested, and the result is published with the timestamp of that request. Nothing here schedules the sweep — read generated_at on the feed for when it last ran.
Today: 29 of 31 measured endpoints answered OK.
It is "of 31", not of every row in the registry. Some entries need a key and are therefore never called — they are unmeasured, not unhealthy, and folding them into the denominator would understate the health of the endpoints we actually test. The JSON feed publishes counts.measured separately for exactly this reason, so a program reading it does not have to reconstruct the distinction from prose.
One small idempotent GET per API, with a descriptive User-Agent, respecting 429s. No bulk downloads and no authenticated mutation. Each entry gets a page showing the live request and the response actually received, so you can see what "OK" meant rather than trusting a green tick.
The results are published as [api-health.json](/api-health.json), dated with generated_at, and are also queryable through the check_api_health tool on [/mcp](/mcp).
This is the one surface on this site where "measured" is the honest word. The AI offers catalog is documented — dated readings of providers' own pages, not calls — and the two are deliberately not mixed.
The current status of every endpoint, with latency and HTTP code, is on the front page. Each API links to a page showing the actual request and response from the last sweep.
Wikipedia REST · Wikidata Query Service · Dictionary API · Open Library · arXiv · Open-Meteo · US National Weather Service · USGS Earthquake Catalog · NASA APIs · Open-Elevation · SunriseSunset.io · OpenStreetMap Nominatim · REST Countries · ipapi.co · ip-api.com · Zippopotam.us · CoinGecko · Frankfurter · open.er-api.com · FRED · SEC EDGAR · Hacker News · Guardian Open Platform · Reddit JSON · TheNewsAPI / NewsData · GitHub REST · APIs.guru · JSONPlaceholder · Open Trivia Database · QR Server · TimeAPI.io · OpenFDA · PubMed E-utilities · Data.gov · Open Food Facts
> These comparisons were last re-checked on 2026-10-05 (the mnfst/awesome-free-llm-apis column on 2026-08-26). > They were accurate against each project's live site on that date, and any of these projects may have shipped new capabilities since. Treat the table below as a dated snapshot, not as a current statement. Next re-check due 2026-11-04.
Each of these does something we do not.
Liveness figures come from the last sweep, published as api-health.json with its generated_at timestamp — read it rather than assuming a cadence. Competitor capabilities were checked against each project's live site.
Surveyed 2026-08-26; re-checked 2026-10-05. Next re-check due 2026-11-04. Every competitor claim was checked against that project's own live site on the survey date — not recalled, and not taken from a search summary. Figures about this catalog are computed from the published feeds at build time, so they cannot drift from the data they describe.
Cite the docs site, never the GitHub repo. Search results describe cheahjs/free-llm-api-resources as the best-known repo in this space, but api.github.com/repos/cheahjs/free-llm-api-resources and the raw README both returned 404 on 2026-08-26, while raw.githubusercontent.com served two other repos fine in the same run — so the repo is gone, not bot-blocked. The docs site returns 200 and the project is live.
The host is wotai.co. An earlier revision of this file recorded wotai.dev, which does not resolve — and the resulting proxy failure was published here as 'unreachable from our container, our network'. It was a non-existent hostname, not a network block. Corrected 2026-08-26 after a re-test with controls: wotai.co resolves to 216.150.1.1 and returns 200 from this container.
Comparisons were checked by a peer worker against each project's own live site on the survey date below.