Engineering Tools Platform

Precision
tools for
builders.

1,200+ engineering tools across electronics, PCB, IoT, 3D printing, and more — each with a production-ready API. Free on the web, paid only when you go programmatic.

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0+
Tools
8
Domains
Free
Web tools
<50ms
API latency
Live tool index · 5 shipping
ESP32 Deep-Sleep Battery LifeIoT / ArduinoGST Reverse Charge (RCM) CalculatorIndia SpecificLLM API Cost CalculatorProgrammingMOSFET Junction TemperatureElectronicsPCB Trace Width CalculatorPCB DesignESP32 Deep-Sleep Battery LifeIoT / ArduinoGST Reverse Charge (RCM) CalculatorIndia SpecificLLM API Cost CalculatorProgrammingMOSFET Junction TemperatureElectronicsPCB Trace Width CalculatorPCB Design
GST Reverse Charge (RCM) CalculatorIndia SpecificMOSFET Junction TemperatureElectronicsESP32 Deep-Sleep Battery LifeIoT / ArduinoPCB Trace Width CalculatorPCB DesignLLM API Cost CalculatorProgrammingGST Reverse Charge (RCM) CalculatorIndia SpecificMOSFET Junction TemperatureElectronicsESP32 Deep-Sleep Battery LifeIoT / ArduinoPCB Trace Width CalculatorPCB DesignLLM API Cost CalculatorProgramming
Domains

Every niche,
fully armed.

We build where others don't look — underserved engineering domains with zero good tooling online. Until now.

⚡
Electronics
200 tools
🔧
PCB Design
100 tools
🖨
3D Printing
150 tools
🔌
IoT / Arduino
100 tools
⚛️
Physics / Eng
150 tools
💻
Programming
200 tools
🇮🇳
India Specific
150 tools
🛠
General Utility
150 tools — converters, formatters and calculators — the everyday stack every builder reaches for.
Browse all →
api.toolsamurai.com / v1
// PCB trace width calculator
POST /electronics/pcb-trace-width
Authorization: Bearer sk_live_•••••••••
{
"current_A": 3.5,
"temp_rise_C": 10,
"layer": "outer"
}
── 200 OK ──────────────
{
"ok": true,
"result": {
"trace_width_mm": 0.856,
"standard": "IPC-2221"
}
}
API

One key.
Every tool.

REST endpoints, clean JSON. Drop engineering intelligence into your app in minutes. No SDK required — just HTTP.

REST JSONOpenAPI specWebhooksSDKsRapidAPI listed<50ms p99Embeddable widgetsUsage dashboard
Pricing

Fair. Simple.

Designed for indie builders and teams. Start free, upgrade when you ship something real.

Free
₹0/mo
Everything to explore and prototype with no pressure.
  • 500 API calls / month
  • All tools, web & API
  • JSON responses
  • Community support
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Coming soon
Builder
₹999/mo
For devs building real products on top of ToolSamurai.
  • 50,000 API calls / month
  • New tools auto-available daily
  • Priority queue
  • Webhook support
  • Email support
Coming soon
Team
₹4,999/mo
White-label and scale across your entire product suite.
  • Unlimited API calls
  • White-label embedding
  • Custom tool requests
  • SLA guarantee
  • Dedicated support