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API · /pump-api

Pump Power API

healthy 4,386 Subscribers

Pump power, head and affinity maths as an API, computed locally and deterministically. The power endpoint computes the power a pump needs from its flow rate, head, fluid density and efficiency: the hydraulic (water) power is ρ·g·Q·H, the shaft (brake) power is that divided by the pump efficiency, and an optional motor efficiency gives the electrical input power — all reported in watts, kilowatts and horsepower. Flow accepts litres per second or minute, cubic metres per hour or second and US gallons per minute; head accepts metres or feet; and the fluid can be water, seawater, oil, diesel and more, or a custom density. The head endpoint converts between pressure and head of fluid, H = P/(ρ·g), in both directions, across pascals, kPa, bar, psi and atmospheres. The affinity endpoint applies the pump affinity laws — flow scales with speed, head with speed squared and power with speed cubed — to predict the new operating point when you change the pump speed or trim the impeller diameter. Everything is computed locally and deterministically, so it is instant and private. Ideal for plumbing and HVAC tools, process and water-treatment engineering, irrigation and pool-pump apps, and energy-efficiency calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is pump power and head maths; for flow rate from pipe diameter and velocity use a pipe-flow API and for open-channel flow use a Manning API.

#pump #hydraulic-power #head #affinity-laws #engineering #developer-tools
api.oanor.com/pump-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
90 ms
Server probes · 24h
Subscribers
4,386
active
Total calls
40
last 7 days
status Full status page → · 24 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • Hydraulic power from flow rate and head
  • Single-call power endpoint
  • Deterministic SI-unit results
  • Community support
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Starter

€9.00 /month

  • 40,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • Power, head and affinity-law endpoints
  • Shaft power with pump efficiency input
  • Metric and US-customary units
  • Email support
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Pro

€24.00 /month

  • 250,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • Full affinity-law speed and impeller scaling
  • Batch pump-curve point computation
  • NPSH and head-loss helpers
  • Priority support
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Mega

€74.00 /month

  • 1,519,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • High-volume pump-selection sizing
  • All endpoints at max throughput
  • Bulk affinity-law sweep computation
  • SLA-backed dedicated support
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Related APIs

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Moment of Inertia API

Rigid-body rotational-inertia mechanics as an API, computed locally and deterministically. The shape endpoint returns the mass moment of inertia and the radius of gyration k = √(I/m) for a named standard body about its characteristic axis — a solid sphere (I = 2/5·m·r²), thin spherical shell (2/3·m·r²), solid cylinder or disk (1/2·m·r²), annular/hollow cylinder (1/2·m·(r1²+r2²)), thin ring (m·r²), thin rod about its centre (1/12·m·l²) or about one end (1/3·m·l²), rectangular plate or cuboid (1/12·m·(a²+b²)), solid cone (3/10·m·r²) and point mass (m·r²) — so a 2 kg solid sphere of radius 0.5 m has I = 0.2 kg·m². The parallel-axis endpoint applies the Steiner theorem I = I_cm + m·d² to shift a moment of inertia from the centre-of-mass axis to any parallel axis a distance d away. The shapes endpoint lists the whole catalog with its formulas. All quantities are SI (kg, m → kg·m²). Everything is computed locally and deterministically, so it is instant and private. Ideal for mechanical-engineering, robotics, CAD/CAE, rotating-machinery, structural-dynamics and physics-education app developers, flywheel-and-shaft design tools, and simulation software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is rotational inertia; for stored rotational energy and flywheel sizing use a flywheel API and for torque and angular acceleration a torque API.

api.oanor.com/momentofinertia-api

Taper Calculator API

Taper and cone geometry as an API, computed locally and deterministically. The taper endpoint relates the large and small diameters, the length and the taper of a conical part: give the two diameters and the length and it returns the taper ratio, the taper per foot and per inch (for inch parts), the included angle 2·atan((D−d)/(2L)) and the half (taper) angle from the axis — or leave one of the diameters or the length out and provide the taper per foot, and it solves for the missing dimension. The diameter-at endpoint gives the diameter (and radius) at any distance along the taper, measured from either the large or the small end, by linear interpolation d(x) = D − (D−d)·x/L. The morse endpoint is a reference of the standard Morse taper series MT0 to MT7, with each taper's taper per foot, gauge-line large and small diameter, length and included angle. Lengths and diameters use consistent units (inches by default, or millimetres for the angle and ratio outputs). Everything is computed locally and deterministically, so it is instant and private. Ideal for machining and lathe tools, CAD and toolmaking apps, maker and metalworking projects, and mechanical-engineering calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is taper geometry; for screw-thread pitch and tap drill use a thread API and for spur-gear geometry use a gear API.

api.oanor.com/taper-api

Thermal Expansion API

Thermal-expansion maths as an API, computed locally and deterministically. The linear endpoint computes how much a solid grows or shrinks when its temperature changes, ΔL = α·L0·ΔT, returning the change in length and the new length from an original length, a temperature change (given directly or as an initial and final temperature) and the linear expansion coefficient α — taken from a built-in material table (steel, aluminium, copper, concrete, glass, invar and more) or supplied directly; lengths accept metres, centimetres, millimetres, feet or inches. The volume endpoint computes volumetric expansion, ΔV = β·V0·ΔT, where for a solid the volumetric coefficient is β ≈ 3α and for a liquid (water, ethanol, mercury, petrol and others) β is taken directly; volumes accept cubic metres, litres, millilitres or cubic feet. The materials endpoint lists the coefficients. A negative temperature change gives contraction. Everything is computed locally and deterministically, so it is instant and private. Ideal for civil and mechanical engineering tools, rail, pipe and bridge expansion-gap design, manufacturing-tolerance and HVAC apps, and physics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is thermal expansion; for heat energy and temperature change use a specific-heat API.

api.oanor.com/thermalexpansion-api

Screw Jack API

Power-screw (lead-screw and screw-jack) mechanics as an API, computed locally and deterministically. The torque endpoint computes the torque to raise and to lower a load on a power screw from the load, the mean thread diameter, the lead (given directly or as pitch × starts) and the coefficient of friction: T_raise = (W·dm/2)·(L + π·μ′·dm)/(π·dm − μ′·L), with the matching lower torque, the lead angle, the efficiency (W·L ÷ 2π·T_raise) and whether the screw is self-locking (it is when the effective friction is at least the tangent of the lead angle). Square threads are the default; pass a thread angle (for example 29° for an ACME thread) and it applies the effective friction μ/cos(half-angle). The effort endpoint turns that torque into the hand force on a lever or handle and the resulting mechanical advantage. The travel endpoint relates turns, lift distance and — with an rpm — the linear speed and time. Lengths are in millimetres, load in newtons and torque in newton-metres. Everything is computed locally and deterministically, so it is instant and private. Thread friction only — add collar/thrust friction separately. Ideal for machine-design and mechanism tools, jack, press, vice and clamp design, maker and robotics projects, and engineering calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is power-screw mechanics; for the geometry of a screw thread use a thread API and for bolt tightening torque use a torque API.

api.oanor.com/screwjack-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Pump Power API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Pump Power API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Pump Power 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 Pump Power API cost?
Pump Power API has a free tier with 100 calls / month. Paid plans start at €9.00 / 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 Pump Power API GDPR-compliant?
All requests to Pump Power 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/pump-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/pump-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/pump-api/SOME_PATH");
curl_setopt($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/pump-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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