API · /twostroke-api

Two-Stroke Mix API

healthy 4,659 Subscribers

Two-stroke premix maths as an API, computed locally and deterministically — the gas-to-oil numbers anyone running a chainsaw, string trimmer, leaf blower, outboard, dirt bike or RC engine mixes fuel by. The mix endpoint gives the oil to add to a tank of fuel at a given ratio: oil = fuel ÷ ratio, so one US gallon at 50:1 needs about 75.7 ml (2.6 fl oz) of two-stroke oil, 40:1 about 94.6 ml (3.2 fl oz) and 32:1 about 118 ml (4.0 fl oz), and it returns the total mix and the oil percentage too, in litres, gallons, millilitres or fluid ounces. The ratio endpoint runs it the other way — measure the fuel and the oil you actually put in and it tells you the real N:1 ratio, the oil percentage and the nearest common ratio, so you can check a mix or reverse-engineer a pre-mixed can. Get it wrong and it matters: too little oil and the engine seizes, too much and it fouls plugs and smokes — so always use the ratio in your tool’s manual. Everything is computed locally and deterministically, so it is instant and private. Ideal for small-engine, outdoor-power-equipment, marine, powersports and DIY app developers, fuel-mixing and shop tools, and maintenance software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 2 compute endpoints.

#two-stroke #small-engine #premix #powersports #outdoor-power #developer-tools

api.oanor.com/twostroke-api

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Machine-readable spec so AI agents can integrate this API.

/api/twostroke-api/openapi.json

/api/twostroke-api/llms.txt

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

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 94 ms; Server probes · 24h
Subscribers: 4,659; active
Total calls: 3; last 7 days

Full status page → · 6 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

6,880 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
6,880 calls/month
2 req/sec
Premix oil + ratio identify
No credit card

Starter

€4.23 /month

55,900 calls / month
6 requests / second
Hard cap (429 above quota, no overage)
55,900 calls/month
6 req/sec
l/gal/ml/floz, oil %, nearest ratio
Email support

Pro

€11.62 /month

229,800 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
229,800 calls/month
15 req/sec
Fuel-mixing & shop-tool pipelines
Priority support

Mega

€37.15 /month

1,334,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
1,334,000 calls/month
40 req/sec
Platform scale
Dedicated SLA

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

Reptile Husbandry API

Reptile-husbandry maths as an API, computed locally and deterministically — the keeper numbers behind a healthy vivarium, so the setup is right before the animal moves in. The enclosure endpoint turns an animal length and its habit into the minimum floor length, width and height: terrestrial snakes want a floor at least as long as the snake (a 48-inch corn snake → a 48 × 24 × 24 inch minimum, eight square feet of floor), arboreal species trade floor for height (an 18-inch chameleon → 27 × 18 × 36 inches, tall), and ground lizards and tortoises need far more floor than their body length. The uvb endpoint gives the UV-B target by Ferguson zone — the 1-to-4 classification from Baines et al. (2016) of how much sun a species basks in — returning the mean and basking UV-index ranges (zone 3 open baskers want a basking UVI of 2.9–7.4), and, if you pass a lamp UVI measured at a reference distance, an inverse-square estimate of the mounting distance for the right basking UVI. The feeding endpoint sizes prey from body weight and life stage: a meal of roughly 10–15 % of body weight, no wider than the animal, on an interval that lengthens with age — a 500 g adult snake takes a 40–60 g prey item every fortnight. Everything is computed locally and deterministically, so it is instant and private. Ideal for reptile-keeper and herpetoculture apps, pet-store and breeder tools, vivarium-planning calculators, and care-sheet sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Educational husbandry estimates — not veterinary advice; research your exact species.

api.oanor.com/reptile-api

Garden Pond API

Garden and koi-pond maths as an API, computed locally and deterministically — the numbers behind a backyard water feature, so you do not have to guess at the hose. The volume endpoint turns length, width and average depth into the water volume in cubic feet, US gallons and litres, applying a shape factor (rectangular 1.0, oval or round 0.79, irregular 0.85) because a liner pond never holds the full bounding box: an 8 × 6 ft pond two feet deep is about 96 cubic feet, or 718 gallons. The liner endpoint sizes the flexible liner to fit a pond — length equals the pond length plus twice the maximum depth plus twice the overlap to anchor under the edging stones (same for width), so that same 8 × 6 pond at two feet deep with a one-foot overlap needs a 14 × 12 ft liner and matching underlayment. The stock endpoint turns a water volume into a safe fish load and the pump you need: roughly one koi per 250 gallons (they grow large and dirty) or one goldfish per 20, plus the pump flow in gallons per hour to turn the whole pond over at least once an hour for koi — 718 gallons holds about two koi and wants a ~720 GPH pump before head-height losses. Everything is computed locally and deterministically, so it is instant and private. Ideal for landscaping and pond-installer tools, garden-design and home-improvement apps, koi and water-garden hobbyist sites, and aquascaping calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. For pool chemistry use a pool API; for indoor fish tanks use an aquarium API.

api.oanor.com/pond-api

Sunscreen & UV API

Sun-safety maths as an API, computed locally and deterministically — the burn-time, SPF and reapplication numbers a sunscreen, weather or outdoor app keeps people safe with. The burntime endpoint estimates how long until sunburn from the Fitzpatrick skin type (1 very fair to 6 deeply pigmented), the UV index and the SPF: unprotected time is a skin-type base (type II around 15 minutes) scaled by 6 ÷ UV index, and protected time is that times the SPF — so fair type-II skin at UV 8 burns in about 11 minutes bare, or roughly 5½ hours under SPF 30, while very fair type-I skin in extreme UV 11 burns in 5 minutes. The spf endpoint flips it: the SPF needed = your desired minutes outdoors ÷ the unprotected time, with the reminder that real protection plateaus around SPF 30–50. The amount endpoint covers the part people get wrong — about 2 mg/cm², roughly 1 ounce (30 g, a shot glass) for a full adult body, reapplied every two hours — and totals the sunscreen for a day out. Everything is computed locally and deterministically, so it is instant and private. Ideal for sun-safety, weather, skincare and outdoor app developers, UV-alert and reminder tools, and wellness software. Pure local computation — no key, no third-party service, instant. Educational estimates, not medical advice. Live, nothing stored. 3 compute endpoints.

api.oanor.com/sunscreen-api

Hammock Hang API

Hammock-hang maths as an API, computed locally and deterministically — the suspension-force, ridgeline and strap-height numbers a camper or hammock hanger sets up by. It all comes back to the 30-degree rule. The force endpoint shows why: the tension in each suspension line is the occupant weight ÷ (2 × sin of the hang angle), so at a 30° hang each strap carries about one body weight, but flatten the hang to 15° and it jumps to roughly 1.9 times — which is what over-stresses straps, trees and your back when people pull a hammock drum-tight. The ridgeline endpoint sizes a structural ridgeline at about 83 % of the hammock length, the fixed line that reproduces that ~30° lay and the right sag on any pair of trees. The strapheight endpoint estimates how high to attach the straps from the distance between the trees and the seat height you want, since trees farther apart need higher anchor points to hold the angle. Everything is computed locally and deterministically, so it is instant and private. Ideal for camping, backpacking, outdoor-gear and hammock app developers, hang-calculator and trip-planning tools, and adventure software. Pure local computation — no key, no third-party service, instant. Weight and lengths in your own unit. Live, nothing stored. 3 compute endpoints.

api.oanor.com/hammock-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Two-Stroke Mix API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Two-Stroke Mix API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Two-Stroke Mix 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 Two-Stroke Mix API cost?

Two-Stroke Mix API has a free tier with 100 calls / month. Paid plans start at €4.23 / 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 Two-Stroke Mix API GDPR-compliant?

All requests to Two-Stroke Mix 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.

TwoStroke 2

Meta 1

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

GET /v1/mix

Oil for a fuel volume

Playground

Parameters

Custom headers

Language: Client:

GET /v1/ratio

Ratio from amounts

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Spec

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/twostroke-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/twostroke-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/twostroke-api/SOME_PATH");
curl_setopt($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/twostroke-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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Two-Stroke Mix API

API health

Pricing

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Related APIs

Reptile Husbandry API

Garden Pond API

Sunscreen & UV API

Hammock Hang API

Frequently asked questions

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