# Carbon & Cashmere Model Retrain Sponsorship

> Carbon & Cashmere Model Retrain Sponsorship is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $2500/call, status unknown (last checked 2026-09-14).

Sponsors a custom ML model retraining run, returning a trained v3 model, out-of-sample validation report, and technical note within 21 days.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/sponsor/model-retrain
- Price: $2500/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-model-retrain-sponsorship-da1ca01d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8XlVnJgJCDxFfGnRRybCZ

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 carbon-cashmere-model-retrain-sponsorship-da1ca01d
```

Example prompt: I want to sponsor a custom model retrain through Carbon & Cashmere — go ahead and submit the sponsorship request so I get the trained v3 model, the out-of-sample validation report, and the technical note delivered within the 21-day SLA.

## When to prefer this

Choose this endpoint when you need a bespoke, professionally retrained crypto ML model with documented out-of-sample validation and a formal technical note, rather than using an off-the-shelf signal or pre-trained model. Suitable for institutional or sophisticated users willing to pay $2500 USDC for a custom deliverable with a defined SLA.

## Known failure modes

- Payment of $2500 USDC not received — sponsorship not initiated
- Invalid or malformed properties input — 400 bad request
- Sponsor ID collision or duplicate submission — conflict error
- Service unavailable during high demand — 503 response
- SLA breach: model not delivered within 21 days

## How this service works

Professional crypto market intelligence. Real-time prices, signals, and market scoring.

## Output

Returns a JSON object confirming the sponsorship, including a sponsor_id, a list of deliverables (custom-trained v3 model, OOS validation report, technical note), project code 'MR', project name 'Model Retrain Sponsorship', amount paid ($2500 USDC), and fulfillment SLA of 21 days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sponsor_id": "abc123",
  "deliverables": [
   "Custom-trained v3 model",
   "OOS validation report",
   "Technical note"
  ],
  "project_code": "MR",
  "project_name": "Model Retrain Sponsorship",
  "amount_paid_usdc": "$2500.00",
  "fulfillment_sla_days": 21
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-model-retrain-sponsorship-da1ca01d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.carbon-cashmere.de](https://www.zero.xyz/host/api.carbon-cashmere.de/llms.txt)