Who it is for
Anyone wiring date validation into an agent workflow that needs the same answer shape every time.
Overview
What Date Range Validator does
Date Range Validator takes a start date and an end date and checks whether the pair holds together. When it does, the app also calculates how long the interval is.
Bad input is handled explicitly. Fields that are missing or values that do not parse come back as errors rather than as a guess, and results arrive in a fixed structure so a calling workflow can rely on the shape.
No external action of any kind is performed. The record includes an out-of-scope example to make the boundary clear: asking whether a given range is suitable for an email is not a question this app answers. Beike Yan publishes it.
What stands out
The scope is narrow by design, and the record names the kind of question it will decline.
Availability
Where Date Range Validator is listed
Date Range Validator 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
- June 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
- Validate date range: start="2026-06-01", end="2026-06-10"
- Out-of-scope input: "Is this range okay for email?"
Nearby
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This is an independent catalogue entry compiled by Node8 from Date Range Validator'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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