# StableProducts Channel3 Price Tracking Start

> StableProducts Channel3 Price Tracking Start is a paid API for AI agents from stableproduct.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Start a price tracking subscription for a specific Channel3 product by canonical product ID

## Facts

- Endpoint: POST https://stableproduct.dev/api/channel3/price-tracking/start?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stableproducts-channel3-price-tracking-start-89b46637
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qarcnR1J__jYjdou5VWqe

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 stableproducts-channel3-price-tracking-start-89b46637 -d '<json body>'
```

Example prompt: Start tracking the price of Channel3 product 'prod_abc123' for me — and include the raw tracking data in the response.

## When to prefer this

Use this endpoint when you need to initiate a new price monitoring subscription for a specific Channel3 product identified by its canonical product ID. Prefer this over listing existing subscriptions (which is a separate endpoint) when the goal is to create, not read, a tracking record. Best suited for agent workflows that automate deal discovery or price-change alerting.

## Known failure modes

- Missing or empty canonical_product_id returns a validation error
- Unknown product ID returns a not-found error
- Payment not processed (x402 payment required) returns a 402 response
- Duplicate subscription may return a conflict error or idempotent confirmation
- Network timeout or service unavailability returns a 5xx error

## How this service works

Product catalog APIs powered by x402.

## Output

Returns a confirmation of the new price tracking subscription for the specified canonical product ID, along with subscription metadata and optionally raw tracking data if include_raw is set to true.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "include_raw": {
   "type": "boolean"
  },
  "canonical_product_id": {
   "type": "string",
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stableproducts-channel3-price-tracking-start-89b46637/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stableproduct.dev](https://www.zero.xyz/host/stableproduct.dev/llms.txt)