---
title: "Read-equivalence certificate for one URL: the main text served to GPTBot, ClaudeBot and PerplexityBot compared word by word with what a browser receives at the same moment; verdict per identity with the diff ratio and the sentences only one side received. Signed"
method: GET
path: "/api/v1/read-equivalence"
---

# Read-equivalence certificate for one URL: the main text served to GPTBot, ClaudeBot and PerplexityBot compared word by word with what a browser receives at the same moment; verdict per identity with the diff ratio and the sentences only one side received. Signed

`GET /api/v1/read-equivalence`

## Request

- Base URL: `https://crawlcheck.io`
- URL: `https://crawlcheck.io/api/v1/read-equivalence`
- Auth: none required

## Query parameters

- `url` string, required

## Response `200`

crawlcheck-read-equivalence

- object, nullable
  - `kind` string, nullable
  - `v` number, nullable
  - `url` string, nullable
  - `checked_at` string, nullable
  - `read_now` boolean, nullable
  - `verdict` string, nullable
  - `why` string, nullable
  - `ai_identities_served` string, nullable
  - `browser` object, nullable
    - `status` number, nullable
    - `final_url` string, nullable
    - `words` number, nullable
    - `content_sha256` unknown
  - `identities` object[], nullable
    - `identity` string, nullable
    - `label` string, nullable
    - `status` number, nullable
    - `words` number, nullable
    - `same_bytes` boolean, nullable
    - `text_ratio` number, nullable
    - `verdict` string, nullable
    - `only_this_identity_received` string[], nullable
    - `instruction_like_text` boolean, nullable
    - `why` string, nullable
    - `challenge` boolean, nullable
  - `first_observed` string, nullable
  - `observations` number, nullable
  - `history` unknown[], nullable
    - unknown
  - `sha256` unknown
  - `signature` unknown

## Other responses

- `400`: not a public http(s) URL
- `429`: read limit

---

[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)