# Beam Load Calculator API

> For the complete documentation index, see [llms.txt](/llms.txt).

Beam bending moment, shear, stress, and deflection for common support/load cases with strength and serviceability checks.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `beam-load-calculator`
- Category: `construction`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/beam-load-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/beam-load-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `config` | `str` | no | ss_udl | ss_center | ss_two_thirds | cant_udl | cant_end | fix_udl | fix_center Choices: ss_udl, ss_center, ss_two_thirds, cant_udl, cant_end, fix_udl, fix_center |
| `span_m` | `float` | no |  |
| `udl_kn_m` | `float | None` | no | Uniform load in kN/m (UDL configs) |
| `point_load_kn` | `float | None` | no | Point load in kN (point-load configs) |
| `elastic_modulus_gpa` | `float` | no | E, e.g. steel 200, aluminum 69, timber ~11 |
| `moment_of_inertia_cm4` | `float` | no |  |
| `section_modulus_cm3` | `float` | no |  |
| `allowable_stress_mpa` | `float` | no |  |
| `deflection_limit` | `int` | no | Span/ratio serviceability limit, e.g. 360 for L/360 |

## Example request

```json
{
  "config": "ss_udl",
  "span_m": 4,
  "udl_kn_m": 5,
  "moment_of_inertia_cm4": 3540,
  "section_modulus_cm3": 354
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/beam-load-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"config":"ss_udl","span_m":4,"udl_kn_m":5,"moment_of_inertia_cm4":3540,"section_modulus_cm3":354}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "beam-load-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Beam Load Calculator API do?

Beam bending moment, shear, stress, and deflection for common support/load cases with strength and serviceability checks. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.