# CAPI2 Momentum Foundry – Parametric Hirth Dial Generator

> CAPI2 Momentum Foundry – Parametric Hirth Dial Generator is a paid API for AI agents from capi2-foundry.vandurmedries.workers.dev, paid per call via x402, $3.9/call, status unknown (last checked 2026-10-10).

Generates parametric design specifications for a Hirth joint (serrated coupling) dial given body dimensions, tooth count, and amplitude.

## Facts

- Endpoint: POST https://capi2-foundry.vandurmedries.workers.dev/v1/products/parametric-hirth-dial/run?utm_source=zero.xyz
- Price: $3.9/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/capi2-momentum-foundry-parametric-hirth-dial-generator-51881562
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qYRGaPah7gl-qPyu8sK5M

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 capi2-momentum-foundry-parametric-hirth-dial-generator-51881562 -d '<json body>'
```

Example prompt: Generate Hirth dial specs for a body that's 12 mm tall, 40 mm outer diameter, with 24 indexing positions and a tooth amplitude of 1.5 mm.

## When to prefer this

Use this endpoint when you need programmatically generated Hirth joint coupling geometry (tooth profiles, indexing parameters) for a specific set of physical dimensions and position counts, especially in automated CAD pipelines, agent-driven design workflows, or manufacturing specification generation where a verified, receipted result is required.

## Known failure modes

- heightMm out of range (4–30 mm) returns validation error
- diameterMm out of range (10–80 mm) returns validation error
- positions out of range (3–32) returns validation error
- amplitudeMm out of range (1.2–4 mm) returns validation error
- Payment not settled via x402 returns 402 Payment Required
- Malformed JSON body returns 400 Bad Request
- Service unavailable on Workers runtime returns 503

## How this service works

Paid agent utilities delivered after verified x402 settlement.

## Output

Returns a JSON object containing the computed Hirth dial design result under the 'result' key, a creation timestamp, the product ID ('parametric-hirth-dial'), and a delivery receipt that includes payer address, receipt UUID, delivery timestamp, input and result SHA-256 hashes, the amount charged in atomic USDC units, and a signature hash for verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "heightMm": {
   "type": "number",
   "maximum": 30,
   "minimum": 4,
   "description": "Body height in millimetres"
  },
  "positions": {
   "type": "number",
   "maximum": 32,
   "minimum": 3,
   "description": "Indexing positions"
  },
  "diameterMm": {
   "type": "number",
   "maximum": 80,
   "minimum": 10,
   "description": "Outer diameter in millimetres"
  },
  "amplitudeMm": {
   "type": "number",
   "maximum": 4,
   "minimum": 1.2,
   "description": "Tooth amplitude in millimetres"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "createdAt": "2026-09-23T00:00:00.000Z",
  "productId": "parametric-hirth-dial",
  "deliveryReceipt": {
   "payer": "0x0000000000000000000000000000000000000000",
   "productId": "parametric-hirth-dial",
   "receiptId": "00000000-0000-4000-8000-000000000000",
   "deliveredAt": "2026-09-23T00:00:00.000Z",
   "inputSha256": "example-input-sha256",
   "amountAtomic": "3900000",
   "resultSha256": "example-result-sha256",
   "signatureSha256": "example-signature-sha256"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/capi2-momentum-foundry-parametric-hirth-dial-generator-51881562/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from capi2-foundry.vandurmedries.workers.dev](https://www.zero.xyz/host/capi2-foundry.vandurmedries.workers.dev/llms.txt)