DLI from PPFD
API · /hydroponics-api
Hydroponics API
Hydroponics and indoor-grow maths as an API, computed locally and deterministically — the nutrient-strength and grow-light numbers a grower dials in every day. The ec endpoint converts between electrical conductivity (EC in mS/cm) and the PPM/TDS reading on whichever scale a meter uses: the 500 (NaCl, US) scale turns EC 2.0 into 1000 ppm, the 700 (KCl) scale into 1400 ppm and the 640 (EU) scale into 1280 — the source of endless confusion between meters. The dli endpoint computes the Daily Light Integral, DLI = PPFD × photoperiod × 3600 ÷ 1,000,000, the total moles of light a crop gets in a day (leafy greens want about 12–17, fruiting crops 20–30+), and reverses it to the PPFD a fixture must deliver to hit a target DLI over a given day length. The reservoir endpoint balances a tank to a target EC: how much plain water to add to dilute a too-strong solution (W = V × (current/target − 1)), or how much concentrated stock to add to raise it. Everything is computed locally and deterministically, so it is instant and private. Ideal for hydroponics, vertical-farming, controlled-environment-agriculture, grow-room and smart-garden app developers, dosing and lighting tools, and horticulture education. Pure local computation — no key, no third-party service, instant. EC in mS/cm, volume in litres, PPFD in µmol/m²/s. Live, nothing stored. 3 compute endpoints. State your TDS scale; confirm with a calibrated meter.
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 80 ms
- Server probes · 24h
- Subscribers
- 4,829
- active
- Total calls
- 76
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 4,250 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 4,250 calls/month
- 2 req/sec
- EC/PPM + DLI + reservoir
- No credit card
Starter
€5.55 /month
- 45,000 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 45,000 calls/month
- 6 req/sec
- All TDS scales, target-DLI, dosing
- Email support
Pro
€14.80 /month
- 207,000 calls / month
- 15 requests / second
- Hard cap (429 above quota, no overage)
- 207,000 calls/month
- 15 req/sec
- Grow-room & CEA pipelines
- Priority support
Mega
€46.00 /month
- 1,175,000 calls / month
- 40 requests / second
- Hard cap (429 above quota, no overage)
- 1,175,000 calls/month
- 40 req/sec
- Platform scale
- Dedicated SLA
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Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Hydroponics API?
What's the rate limit for Hydroponics API?
How much does Hydroponics API cost?
Can I cancel my subscription anytime?
Is Hydroponics API GDPR-compliant?
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Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/hydroponics-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/hydroponics-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/hydroponics-api/SOME_PATH");
curl_setopt($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/hydroponics-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())
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