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API · /brewing-api

Homebrewing API

healthy 4,215 Subscribers

Homebrewing maths as an API, computed locally and deterministically. The abv endpoint computes the alcohol by volume from the original and final gravity — both the simple (OG − FG)·131.25 estimate and a more accurate high-gravity formula — along with the apparent and real attenuation and the calories per 12 oz serving. The gravity endpoint converts freely between specific gravity, degrees Plato and Brix (the three ways brewers and winemakers measure dissolved sugar) and reports the gravity points. The ibu endpoint computes hop bitterness in International Bitterness Units by the Tinseth formula from the hop alpha-acid percentage, the weight, the boil time, the batch volume and the wort gravity, returning the utilization and the alpha-acid concentration too. Gravities are specific gravity such as 1.050, hop weight in grams, boil time in minutes and volume in litres. Everything is computed locally and deterministically, so it is instant and private. Ideal for homebrew, craft-beer, cidery and winemaking app developers, recipe and batch tools, and brewing education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is brewing maths; for a brewery directory use a beer API and for coffee brew ratios a coffee API.

#brewing #homebrew #abv #ibu #beer #utilities
api.oanor.com/brewing-api
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Machine-readable spec so AI agents can integrate this API.

/api/brewing-api/openapi.json
/api/brewing-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
84 ms
Server probes · 24h
Subscribers
4,215
active
Total calls
28
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • ABV from original & final gravity
  • IBU bitterness estimate
  • Deterministic, instant results
  • Community support
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Starter

€4.00 /month

  • 40,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • All brewing calculators
  • ABV, IBU, gravity & SRM helpers
  • Email support
  • No upstream data latency
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Pro

€11.00 /month

  • 250,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • High-volume recipe tooling
  • Batch-friendly throughput
  • Priority support
  • 99.9% uptime target
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Mega

€39.00 /month

  • 1,508,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • Bulk brewery & app-scale volume
  • Highest rate limits
  • Dedicated support channel
  • SLA-backed availability
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Related APIs

Other APIs with overlapping tags.

Coffee Brewing API

Coffee brewing maths as an API, computed locally and deterministically. The ratio endpoint works out a brew recipe from any two of the coffee dose, the water and the brew ratio — water = coffee × ratio — and reports the third value, the ratio as 1:N, the number of cups and whether the recipe sits around the SCA "golden ratio" of about 1:16–1:17. The espresso endpoint does the same for espresso from any two of the dose, the yield and the brew ratio (yield = dose × brew ratio), labelling the shot ristretto, normale or lungo. The extraction endpoint computes the extraction yield, EY% = (beverage mass × TDS%) ÷ dose, from the dose, the brewed beverage mass (or the water, estimating the mass the grounds retain) and the measured total dissolved solids, then classifies the brew as under-extracted, ideal or over-extracted and weak through very strong against the SCA brewing control chart. Masses are in grams, water in grams or millilitres. Everything is computed locally and deterministically, so it is instant and private. Ideal for specialty-coffee, café, brewing-scale and recipe app developers, pour-over and espresso tools, and barista training. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is coffee brewing maths; for cooking-unit conversions use a cooking API and for caffeine intake use a caffeine API.

api.oanor.com/coffee-api

Draft Beer API

Draft-beer dispense maths as an API, computed locally and deterministically — the CO₂ pressure and beer-line numbers a homebrewer, kegerator owner or bar sets a tap by. (This is the serving side; for ABV, gravity and IBU that is a homebrewing calculation.) The carbonation endpoint gives the regulator head pressure that holds a target carbonation at the serving temperature, from the standard volumes-temperature-pressure regression: 2.5 volumes of CO₂ at 38 °F needs about 11 psi, and colder beer holds the same carbonation at a lower pressure — British ales sit around 1.5–2.0 volumes, US ales 2.2–2.7, lagers and wheats higher. The balance endpoint sizes the beer line so the system pours a clean head instead of foaming or pouring slow: line length = (applied pressure − 0.5 × rise − residual) ÷ the line’s resistance per foot, where gravity adds about 0.5 psi per foot of lift and roughly 1 psi is left at the faucet — so 12 psi with no rise on 3/16-inch vinyl (≈3 psi/ft) wants about 3.7 feet, while narrower or wider tubing changes everything. Everything is computed locally and deterministically, so it is instant and private. Ideal for homebrew, kegerator, bar, brewery-taproom and beverage app developers, draft-system and troubleshooting tools, and hospitality software. Pure local computation — no key, no third-party service, instant. Dispense side only. Live, nothing stored. 2 compute endpoints.

api.oanor.com/draftbeer-api

Homebrew API

The macOS and Linux package manager — Homebrew (brew) — as an API. Look up any formula (command-line package) for its description, latest version, license, homepage, dependencies and build dependencies, caveats and deprecation status; look up any cask (graphical macOS app) for its version, bundled apps and homepage; and search the whole registry of 8,300+ formulae and 7,600+ casks by name and description. Each result comes with the exact `brew install` command. Covers the Homebrew world from wget, git, ffmpeg, node and python to Firefox, Visual Studio Code, Docker and Rectangle. Live from the official formulae.brew.sh API. Ideal for developer dashboards, package and dependency tooling, dotfiles and setup automation, and macOS app catalogs. Open data from Homebrew.

api.oanor.com/brew-api

Alcohol & ABV API

Alcohol and cocktail maths as an API, computed locally and deterministically — the ABV, dilution and standard-drink numbers a bartender, brewer or drinks app works out behind the bar. The abv endpoint mixes a drink: pass the ingredients as a volume:abv list and it returns the final alcohol by volume = (sum of volume × ABV) ÷ total volume, so a Negroni-style 2 parts at 40 %, 1 at 20 % and 1 mixer at 0 % lands at 25 % ABV (50 US proof), with mixers diluting the result. The dilution endpoint models ice melt and stirring, which add water and drop the strength: final volume = volume × (1 + dilution) and ABV falls by the same factor while the alcohol itself is unchanged, so a 4 oz stirred drink at 25 % with 25 % dilution becomes 5 oz at 20 % — stirred drinks pick up roughly 20–25 %, shaken a little more. The standard endpoint counts the dose: pure alcohol = volume × ABV, then a US standard drink is 14 grams (0.6 fl oz) and a UK unit is 10 ml of pure alcohol, so a 12 fl oz beer at 5 % is one standard drink (14 g, 1.77 UK units) and a 5 fl oz glass of 12 % wine is one too. Everything is computed locally and deterministically, so it is instant and private. Ideal for bartending, brewing, beverage, hospitality and responsible-drinking app developers, cocktail-builder and drink-tracker tools, and bar-menu calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. For drink recipes use a cocktails database API.

api.oanor.com/abv-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Homebrewing API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Homebrewing API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Homebrewing API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Homebrewing API cost?
Homebrewing API has a free tier with 100 calls / month. Paid plans start at €4.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Homebrewing API GDPR-compliant?
All requests to Homebrewing API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/brewing-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/brewing-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/brewing-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/brewing-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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