Who it is for
API teams and technical writers auditing whether reference docs match the contract they describe.
AI Connectors · Developer Tools
API Documentation Checker
Compare API documentation against a stated contract
Overview
What API Documentation Checker does
This app works on API contracts and the documentation written around them. It pulls the details out of a contract, meaning endpoints, parameters, responses, and error cases, then checks whether the accompanying documentation actually covers them. It can also diff two versions of a contract and report what changed between them.
Output is structured and tied to evidence. The record is clear that analysis stays inside what has been supplied: nothing is inferred about an API beyond the text handed to it.
That limit shapes what the results are good for. A gap the checker reports is a gap between two documents in front of it, not a judgement about the service behind them.
What stands out
It declines to reason past the supplied material, which keeps coverage checks and version diffs anchored to the text itself.
Availability
Where API Documentation Checker is listed
API Documentation Checker is listed in the ChatGPT apps directory only. BEIKE YAN has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
In the ChatGPT apps directory
- Developer
- BEIKE YAN
- Filed under
- Developer Tools
- Listed since
- July 2026
- Authentication
- Authenticates when installed
- Policies published
- Privacy policy · Terms of service
- Official listing
- Open in ChatGPT
- Snapshot
- August 2026
Example prompts from the listing
- Extract the endpoints, parameters, responses, and errors from this API contract.
- Check whether this documentation fully covers the stated API contract.
- Compare these two API contract versions and identify the changes.
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This is an independent catalogue entry compiled by Node8 from API Documentation Checker's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with BEIKE YAN, and inclusion here is not an endorsement.
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