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API · /pid-api

PID Tuning API

healthy 4,305 Subscribers

PID-controller-tuning maths as an API, computed locally and deterministically. The ziegler-nichols endpoint computes controller gains with the closed-loop (ultimate-gain) method: from the ultimate gain Ku at which the loop sustains oscillation and its period Tu it returns the proportional, integral and derivative gains for a P, PI, PD or PID controller using the classic table (PID: Kp = 0.6·Ku, Ti = 0.5·Tu, Td = 0.125·Tu), in both the standard (Ti, Td) and parallel (Ki, Kd) parameters. The reaction-curve endpoint computes gains with the open-loop method from a step-response process model — the process gain K, the dead time L and the time constant T — using the Ziegler-Nichols reaction-curve table (PID: Kp = 1.2·T/(K·L), Ti = 2L, Td = 0.5L). The convert endpoint translates between the parallel form (Kp, Ki, Kd) and the standard form (Kp, Ti, Td) using Ki = Kp/Ti and Kd = Kp·Td. Everything is computed locally and deterministically, so it is instant and private. Ideal for industrial-automation, robotics, process-control, motor-control and IoT app developers, controller-tuning and loop-design tools, and control-systems education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is PID controller tuning; for op-amp circuits use an op-amp API and for resonance and reactance a resonance API.

#pid #control-systems #ziegler-nichols #tuning #automation #developer-tools
api.oanor.com/pid-api
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Machine-readable spec so AI agents can integrate this API.

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

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PID Tuning API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
74 ms
Server probes · 24h
Subscribers
4,305
active
Total calls
76
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,850 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,850 calls/month
  • 2 req/sec
  • Closed-loop + reaction curve + convert
  • No credit card
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Starter

€10.00 /month

  • 41,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 41,000 calls/month
  • 6 req/sec
  • P/PI/PD/PID, parallel & standard forms
  • Email support
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Pro

€25.00 /month

  • 249,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 249,000 calls/month
  • 15 req/sec
  • Automation & robotics pipelines
  • Priority support
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Mega

€72.00 /month

  • 1,730,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,730,000 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 PID Tuning API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call PID Tuning API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for PID Tuning 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 PID Tuning API cost?
PID Tuning API has a free tier with 100 calls / month. Paid plans start at €10.00 / 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 PID Tuning API GDPR-compliant?
All requests to PID Tuning 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/pid-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/pid-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/pid-api/SOME_PATH");
curl_setopt($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/pid-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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