---
title: "Content-change clock for a page: a hash of its main content (chrome, ads, cookie banners and scripts removed; dates, times and tokens masked), when that content was first seen, the bounds of the last observed change, and what the page itself declares (Last-Modified, dateModified, article:modified_time) with whether the two agree. Read at most every 10 minutes; signed"
method: GET
path: "/api/v1/content-clock"
---

# Content-change clock for a page: a hash of its main content (chrome, ads, cookie banners and scripts removed; dates, times and tokens masked), when that content was first seen, the bounds of the last observed change, and what the page itself declares (Last-Modified, dateModified, article:modified_time) with whether the two agree. Read at most every 10 minutes; signed

`GET /api/v1/content-clock`

## Request

- Base URL: `https://crawlcheck.io`
- URL: `https://crawlcheck.io/api/v1/content-clock`
- Auth: none required

## Query parameters

- `url` string, required

## Response `200`

crawlcheck-content-clock

- object, nullable
  - `kind` string, nullable
  - `v` number, nullable
  - `url` string, nullable
  - `checked_at` string, nullable
  - `read_now` boolean, nullable
  - `content_sha256` unknown
  - `content_chars` number, nullable
  - `main_content_last_changed` object, nullable
    - `between` string, nullable
    - `and` string, nullable
  - `unchanged_since_first_observed` unknown
  - `first_observed` string, nullable
  - `observations` number, nullable
  - `changes_observed` number, nullable
  - `declared` object, nullable
    - `last_modified_header` string, nullable
    - `json_ld_date_modified` string, nullable
  - `declared_vs_observed` string, nullable
  - `sha256` unknown
  - `signature` unknown

## Other responses

- `422`: page unreadable

---

[API](https://skmtc.dev/crawlcheck/apis/crawlcheck-api.md) · [All operations](https://skmtc.dev/crawlcheck/apis/crawlcheck-api/llms.txt) · [OpenAPI document](https://skmtc.dev/crawlcheck/apis/crawlcheck-api/revisions/57acbd6d4489?raw)