HERE WSE FindPickup API：文档标注可选的end参数为何必填？

Hey there, I’ve run into similar inconsistencies between API docs and actual behavior before—super frustrating! Let’s break down why you might be seeing this error even though the docs say end is optional:

Possible Causes #

• API Version Mismatch: It’s possible the version of the FindPickup API you’re calling doesn’t match the documentation you’re referencing. Older versions of the API might have required the end parameter, while newer versions made it optional. Double-check the version number in your request URL (e.g., /v1/findpickup vs. an older /v0/findpickup path) and confirm it aligns with the docs you’re reading.
• Conditional "Optional" Parameter: Sometimes docs label a parameter as optional but omit critical context—like it only becomes optional when another specific parameter is included. For example, maybe if you provide a start parameter or use a certain travel mode, end isn’t required, but if you don’t include those, end becomes mandatory. Go back and scan the docs for fine print or context around the end parameter’s optional status.
• Unsynced API Implementation vs. Docs: It’s not unheard of for documentation to get updated before the backend validation logic catches up. If you’ve confirmed your API version matches the docs and there’s no hidden condition, this could be a bug on HERE’s end.
• Example Code Hidden Dependencies: The official example might be using a specific configuration or additional parameters that implicitly make end optional, but when you strip it out, you’re hitting a validation rule that the example didn’t expose.

Steps to Debug #

1. Verify the exact API version in your request URL matches the version specified in the documentation you’re using.
2. Re-read the end parameter’s documentation carefully, paying attention to any notes about conditional requirements or edge cases.
3. Test a minimal request with only the explicitly required parameters (excluding end) to see if the error persists—this can help rule out conflicts with other parameters you might be sending.
4. If all else fails, reach out to HERE’s developer support to report the discrepancy between the docs and actual API behavior. They’ll be able to confirm if it’s a bug or if there’s a missing detail in the documentation.

内容的提问来源于stack exchange，提问作者Daniel Schmidt