# Fence Materials Calculator

> Fence Materials Calculator is a paid API for AI agents from construction-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Calculates the number of posts, rails, and pickets needed for a straight fence given length, post spacing, picket width, and gap.

## Facts

- Endpoint: GET https://construction-calc.x402tookit.com/fence-calc?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fence-materials-calculator-1e7b7875
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z3QPiMQFh2ZNqZcEPmycm

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 fence-materials-calculator-1e7b7875
```

Example prompt: I need to build a straight fence that's 200 feet long — can you figure out how many posts, rails, and pickets I'll need, using 8-foot post spacing, 5.5-inch wide pickets, a 0.5-inch gap between them, and a 6-foot height? I've also got 2 gates.

## When to prefer this

Choose this endpoint when you need a fast, deterministic calculation of fence materials (posts, rails, pickets) for a straight fence run. It is purpose-built for residential and light commercial fencing estimation and handles gates, waste factors, and varying picket dimensions natively. Prefer it over general-purpose calculators or manual spreadsheet math when preparing a materials list or hardware store order.

## Known failure modes

- Missing required lengthFt parameter returns an error
- Unrealistic input combinations (e.g. post spacing larger than fence length) may yield unexpected counts
- Very large waste percentages or zero picket width cause nonsensical outputs
- Non-positive fence length returns a validation error

## How this service works

Posts, rails and pickets for a straight fence from its length, post spacing, picket width and gap.

## Output

Returns the number of posts, rails, and pickets needed, along with picket count adjusted for waste, number of fence sections, total rail linear footage, the effective fence run length after accounting for gates, and a plain-language summary. May include a disclaimer about local building codes.

## 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": [
      "lengthFt"
     ],
     "properties": {
      "gates": {
       "type": "integer",
       "description": "Gates, each takes 4 ft of fence length and 1 extra post, default 0"
      },
      "heightFt": {
       "type": "number",
       "description": "Fence height in feet, default 6"
      },
      "lengthFt": {
       "type": "number",
       "description": "Total fence length in feet"
      },
      "wastePct": {
       "type": "number",
       "description": "Picket waste, default 5"
      },
      "picketGapIn": {
       "type": "number",
       "description": "Gap between pickets in inches, default 0.5 (0 for privacy)"
      },
      "picketWidthIn": {
       "type": "number",
       "description": "Actual picket width in inches, default 5.5"
      },
      "postSpacingFt": {
       "type": "number",
       "description": "Post spacing in feet, default 8"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "gates": {
       "type": [
        "null",
        "number"
       ]
      },
      "posts": {
       "type": [
        "null",
        "number"
       ]
      },
      "rails": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "pickets": {
       "type": [
        "null",
        "number"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "heightFt
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fence-materials-calculator-1e7b7875/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from construction-calc.x402tookit.com](https://www.zero.xyz/host/construction-calc.x402tookit.com/llms.txt)