Fewer “what does it give?” calls
Make, model, engine — then stock, Stage 1 and Stage 2 in hp and Nm. The answer is on the page, so the call you get is the one that books.
REST API · JS widget · WordPress plugin
Chiptuning Gains API Stage 1–4 power & torque on your own website.
The Gains API returns stock and tuned power and torque — Stage 1 to Stage 4, hp and Nm, with the gain already worked out — for 10,000+ engines. Put a remap calculator on your workshop site in minutes, in your own design, and let customers see what their car gains before they pick up the phone.
£250 setup, then £39.99/month · cancel anytime
- 10,000+ engines
- Stage 1 on 96%
- Gains pre-calculated
- Hosted in Germany
Why workshops add it
“How much more power?” Answered on your site.
It is the first thing every customer asks. Answer it for every car you can tune — before they ring, at 2 a.m., on their phone.
Your brand, not ours
It is data, not someone else’s iframe. Render it in your own design, or drop in the widget and theme it. Nothing of ours appears on your page.
Numbers your customer can read
The gain comes back already calculated — +hp, +Nm and the percentage — and a stage that does not exist comes back empty, never invented.
How it works
Three steps. One call.
-
1
Your customer picks the car
Make, model, generation, engine — straight from the API lists, so every option on your page has figures behind it.
GET /makes → /models → /engines -
2
One call fetches the figures
Your key in one header. JSON back with stock, Stage 1 to 4 and the gains — the same shape on every stack.
X-API-Key: tsg_… -
3
Your page shows the gain
Bars, a table, a dyno-style chart — whatever fits your site. Or let the widget draw it for you.
+80 hp · +188 Nm
Live lookup
Pick a car. See exactly what comes back.
7 real engines from the catalogue, with the figures it holds today. Your key opens all 10,000+.
Quick picks
Power
0hp
Torque
0Nm
Stock (dashed)Tuned powerTuned torque
Curve shape illustrative · stock and tuned peaks are the catalogue figures
Trimmed to the fields shown above. The full response — years, displacement, optional ECU, dyno and spec groups — is in the docs.
The data
Deep where cars get remapped. Honest where they don’t.
A tuning catalogue, not a padded one: Stage 3 and 4 appear only on platforms that genuinely have them, and every other stage comes back as null — never a guess dressed up as data.
10,000+
engines with stock and tuned figures
96%
carry Stage 1
44%
carry Stage 2
138
ECU families named
Every engine answers with
- Stock power and torque
- Stage 1 to Stage 4 in hp and Nm
gain_hp,gain_nmandgain_pct, already calculated- Engine code, fuel and displacement
- Make, model, generation and years
Ask for more on the same call
include=ecu— the ECU and the tools that read itinclude=dyno— the dyno curve where one is publishedinclude=specs— the engine’s spec sheet/engines/{id}/photo— a vehicle photo, served by us
Integrate
Live on your site this afternoon.
Two lines of HTML, one WordPress shortcode, or a plain REST call from any language. One key, one header, JSON back.
- No code Paste the widget, or install the WordPress plugin.
- Developers REST + JSON, the same shape on every stack.
- Your look Light or dark, English, German, French or Romanian.
<div id="ts-gains" data-api-key="tsg_your_key" data-theme="dark"></div>
<script src="https://files.tuning-database.co.uk/js/gains-widget.js" async></script>1. Install the gains calculator plugin (guide linked on the left).
2. Settings → paste your key.
3. Put the shortcode on any page:
[portal_gains_calculator theme="dark"]curl "https://files.tuning-database.co.uk/api/v1/gains/engines/180" \
-H "X-API-Key: tsg_your_key" \
-H "Accept: application/json"const res = await fetch(
'https://files.tuning-database.co.uk/api/v1/gains/engines/180',
{ headers: { 'X-API-Key': 'tsg_your_key' } }
);
const { data } = await res.json();
console.log(`Stage 1: +${data.stage1.gain_hp} hp`);$ctx = stream_context_create(['http' => [
'header' => "X-API-Key: " . getenv('GAINS_KEY'),
]]);
$body = file_get_contents('https://files.tuning-database.co.uk/api/v1/gains/engines/180', false, $ctx);
$engine = json_decode($body, true)['data'];
echo $engine['stage1']['hp'];import os, requests
r = requests.get(
'https://files.tuning-database.co.uk/api/v1/gains/engines/180',
headers={'X-API-Key': os.environ['GAINS_KEY']},
timeout=5,
)
engine = r.json()['data']
print(engine['stage2']['gain_hp'])tsg_your_key is a placeholder. Keep a real key on your server, or lock it to your domains before using it in a browser.
Control & security
Your key. Your rules.
Everything that protects your allowance sits in your account and is enforced on our side — not in a browser setting someone can switch off.
Domain and server lock
Up to 3 domains and 3 server addresses. A copied key is refused anywhere else.
Allowance in every answer
Response headers carry what you have left this minute, today and this month.
Warnings before the wall
An email at 50, 75, 90 and 100 % of the month. Refused calls are never counted.
Regenerate or revoke
One click, effective immediately. The old key stops working the moment you replace it.
See who calls your key
Every address that used it in the last 30 days, with its count and whether it was let in.
Your own vehicles
Add a car we do not carry or correct a figure to what you sell. Only your key ever sees it.
Pricing
One plan. Everything included.
No tiers to decode and no per-call surprises. Pay the setup here; the monthly plan follows by secure card link.
Gains API
Setup, once
£250.00
Then
£39.99/month
- 100,000 calls a month · 5,000 a day · 120 a minute
- Stock and Stage 1–4, hp and Nm, gains pre-calculated
- REST API, JS widget and WordPress plugin
- Key locked to 3 domains and 3 server addresses
- Your own vehicles and corrections
- Usage emails, regenerate and revoke, email support
First year £729.88 · every year after £479.88 · cancel the monthly plan anytime
Sold by TUNING DATABASE SRL · CUI 55425106 · refunds & cancellation
From checkout to live key
- 1Pay the setup here
Standard checkout on this page; your order is confirmed straight away.
- 2Start the monthly plan
A secure card link for £39.99/month arrives by email, usually within one business hour.
- 3Your key, your dashboard
The key and its controls appear under My Account → Gains API. Paste it and you are live.
What the alternatives cost
Read from each company’s own page on the date shown. Their figures are in euro, as they publish them.
| Provider | First year | After that | Stages | How you use it |
|---|---|---|---|---|
| Gains API (this page) | £729.88 | £479.88 / year | Stage 1–4, gains pre-calculated | REST API, JS widget and WordPress plugin |
| Dyno-ChiptuningFiles API source · 2026-10-14 | €2,450 excl. VAT | €450 / year | Not stated on their page | REST API; no help implementing it |
| Chiptuningreseller (Medium) source · 2026-10-14 | €800 | €800 / year | Stage 1 | WordPress plugin and iFrame; no REST API listed |
FAQ
Questions, answered straight.
Something not here? Ask us — a person answers.
What exactly do I get for the setup fee?
Your account and your API key, the key dashboard (usage, domain and server-address lock, regenerate and revoke), and the monthly plan link. The setup is paid once; after that it is £39.99 a month, so the first year costs £729.88 and every year after that £479.88.
When does the monthly subscription start?
After you pay the setup you receive a secure card-payment link for the monthly plan, usually within one business hour. The first month is charged when you complete it, then on the same day each month. Cancel from your account whenever you like; the key keeps working to the end of the month you paid for.
How many calls can I make?
100,000 a month, 5,000 a day and 120 a minute. A busy workshop site uses a small part of that. Every answer carries what you have left in its headers, and you get an email at 50, 75, 90 and 100 percent of the month. Past a limit the API answers 429 and says when to try again; a refused call is not counted.
Can somebody else use my key if they copy it?
Not if you lock it. Add up to 3 website domains for calls made from a browser and up to 3 server addresses for calls made from your backend. Both are checked on our side, so a request from anywhere else is refused before it reaches the data. You can also regenerate the key or revoke it instantly from your account.
Which stages and figures come back?
Stock power and torque, then Stage 1 to Stage 4 with horsepower, Nm and the gain already calculated. Stage 1 is published for 96 percent of the engines and Stage 2 for 44 percent. Stage 3 and 4 exist only on the platforms that really have them; everywhere else that stage comes back as null, never as a guess.
What if a vehicle I work on is missing, or a figure is not what I sell?
Add it yourself. Your key can store your own vehicles and your own corrections, and they are returned only to you, ahead of the shared catalogue. Nobody else sees them.
Do I need to be a developer?
No. Paste the two-line widget into any page, or install the WordPress plugin and drop its shortcode where you want the calculator. Developers get a plain REST API with JSON on every stack.
Can I put it in an app or my own booking system?
Yes. It is a normal HTTPS API with one header. Keep the key on your server, call it from your backend and send your own app the figures.
What if it turns out not to be right for me?
Cancel the monthly plan whenever you like and nothing more is charged. The setup is final once your key has been issued, because the work it pays for is done. Money is returned where we charged you twice or in error, where we cannot deliver the key at all, or where the law requires it. The full terms are on our refunds page.
Who am I buying from?
TUNING DATABASE SRL, CUI 55425106, Reg. Com. J2026049785007. You pay through our secure checkout on this page.
Your customers already ask. Answer them tonight.
£250 setup, £39.99 a month, cancel anytime.