# Carbon & Cashmere Sponsor Position Holder

> Carbon & Cashmere Sponsor Position Holder is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $300/call, status unknown (last checked 2026-09-14).

Registers a paid sponsorship position (tier 4) at $300 USDC, returning a sponsor ID, deliverables (1-hr Q&A call), and fulfillment SLA details.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/sponsor/position-holder
- Price: $300/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-sponsor-position-holder-d34529ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_746pUy28vp1rxmwDD38uL

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-sponsor-position-holder-d34529ae
```

Example prompt: Sign me up as a Position Holder sponsor on Carbon & Cashmere — I want to lock in that tier 4 slot with the 1-hour Q&A call deliverable for $300 USDC.

## When to prefer this

Use this endpoint when the user explicitly wants to purchase or register a paid sponsorship position with Carbon & Cashmere, specifically the $300 USDC 'Position Holder' tier that includes a 1-hour Q&A call. Choose this over other C&C endpoints when the goal is transactional (paying for access/deliverables) rather than querying market data.

## Known failure modes

- Payment not received or insufficient funds — endpoint may reject with payment-required error
- Invalid or malformed properties parameter — returns schema validation error
- Sponsorship slots may be sold out or unavailable — returns resource conflict
- Network or provider downtime — returns 5xx error with no sponsor_id issued
- Duplicate submission — idempotency not guaranteed, may create duplicate sponsor records

## How this service works

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

## Output

Returns a JSON object with the sponsor tier (4), tier name ('Position Holder'), a unique sponsor_id, list of deliverables (e.g. '1-hr Q&A call'), the amount paid in USDC, and the fulfillment SLA in hours (48).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 4,
  "tier_name": "Position Holder",
  "sponsor_id": "abc123",
  "deliverables": [
   "1-hr Q&A call"
  ],
  "amount_paid_usdc": "$300.00",
  "fulfillment_sla_hours": 48
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-sponsor-position-holder-d34529ae/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)