# Electronics Calculators – Standard Resistor Value Finder

> Electronics Calculators – Standard Resistor Value Finder is a paid API for AI agents from electronics-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-25).

Returns the nearest standard resistor values above and below a target resistance for a chosen E-series (E6–E192), along with percent error for each neighbour.

## Facts

- Endpoint: GET https://electronics-calc.x402tookit.com/resistor-standard?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/electronics-calculators-standard-resistor-value-finder-f0ddd5a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-rl7gs_oSd5hhxhZ5kc1y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability electronics-calculators-standard-resistor-value-finder-f0ddd5a0
```

Example prompt: What's the nearest standard E24 resistor to 4.3k ohms — give me the values just above and below and their percent error?

## When to prefer this

Use this endpoint when you need to snap a calculated or desired resistance to a physically purchasable standard value and want to know how much error is introduced. Ideal for electronics design agents, BOM (bill of materials) generation, or any workflow where a computed resistance must be mapped to a real component. Prefer over manual lookup tables when you need programmatic access to E-series data or want to compare across multiple series simultaneously.

## Known failure modes

- Missing required 'target' parameter returns an error
- Invalid series string (not E6/E12/E24/E48/E96/E192) returns an error or defaults to E24
- Malformed target string (e.g. non-numeric) returns a parsing error
- Very extreme resistance values outside practical range may return degraded or null results

## How this service works

Nearest standard E6, E12, E24, E48, E96 or E192 resistor values to a target, with the percent error of each neighbour.

## Output

Returns the closest standard resistor value, the nearest values above and below the target, the percent error for each, the series used, whether the target is itself a standard value, and a comparison across other E-series. Also includes a human-readable summary and verdict.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "target"
     ],
     "properties": {
      "series": {
       "type": "string",
       "description": "E6, E12, E24 (default), E48, E96 or E192"
      },
      "target": {
       "type": "string",
       "description": "Target resistance, e.g. 4.3k, 6800 or 2.2M"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "above": {
       "type": [
        "null",
        "number"
       ]
      },
      "below": {
       "type": [
        "null",
        "number"
       ]
      },
      "series": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "target": {
       "type": [
        "null",
        "number"
       ]
      },
      "closest": {
       "type": [
        "null",
        "number"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "errorPct": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "isStandard": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "otherSeries": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object"
… (truncated)
```

## More

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