---
title: "Start Tracking"
method: POST
path: "/v0/price-tracking/start"
tags: ["price-tracking"]
---

# Start Tracking

`POST /v0/price-tracking/start`

Start tracking prices for a canonical product.

## Request body

- StartTrackingRequest
  - `canonical_product_id` string, required

## Response `200`

Successful Response

- SubscriptionResponse
  - `canonical_product_id` string, required
  - `subscription_status` 'active' | 'cancelled', required
  - `created_at` string, date-time, required

## Other responses

- `401` — Unauthorized - Invalid or missing authentication
- `402` — Payment required
- `404` — Not found
- `422` — Validation Error
- `500` — Internal Server Error

## Changes

- **2026-05-21** `48ea59b2e819` — 5 info
  - added `subschema #1, subschema #2` to the `detail` response property `anyOf` list for the response status `401`
  - added `subschema #1, subschema #2` to the `detail` response property `anyOf` list for the response status `402`
  - added `subschema #1, subschema #2` to the `detail` response property `anyOf` list for the response status `404`
  - added `subschema #1, subschema #2` to the `detail` response property `anyOf` list for the response status `422`
  - …1 more

[Change history](https://skmtc.dev/channel3-ai/apis/fastapi/changes/v0/price-tracking/start/post.md)

---

[API](https://skmtc.dev/channel3-ai/apis/fastapi.md) · [All operations](https://skmtc.dev/channel3-ai/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/channel3-ai/fastapi/revisions/981d371bd83e/schema)