Resistora API & MCP
Run resistor combination search, E-series matching, voltage divider design, and circuit calculations from your own code via a clean REST API — or connect them to your AI assistant through the built-in MCP server.
PRO Plan RequiredBoth link to the same OpenAPI spec — choose whichever UI you prefer.
Available Features
Find optimal resistor combinations from your available resistors (2–4 resistors)
Genetic-algorithm solver over any custom resistor values, with top-10 results (2–4 resistors, PRO only)
Find resistor combinations from standard E-series (E6–E192)
Design voltage divider circuits with optimal resistor pairs
Calculate output voltage for a given voltage divider configuration
Calculate total resistance for custom circuit schemas (16 series/parallel schemas)
Calculate resistance for a single circuit schema with given resistor values
Rate Limits
| Feature | RPM | Daily | Monthly |
|---|---|---|---|
| Resistor Combination | 30 | 500 | 5,000 |
| Resistor Combination (Pro) | 10 | 100 | 1,000 |
| E-Series Finder | 30 | 500 | 5,000 |
| E-Series Finder (Pro) | 30 | 500 | 5,000 |
| Voltage Divider | 10 | 100 | 1,000 |
| Voltage Divider (Pro) | 10 | 100 | 1,000 |
| Divider Builder | 100 | 1,000 | Unlimited |
| Circuit Calculator | 100 | 1,000 | Unlimited |
| Circuit Builder | 100 | 1,000 | Unlimited |