> For the complete documentation index, see [llms.txt](https://docs.pixiebrix.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pixiebrix.com/how-to/troubleshooting/troubleshooting-bad-api-requests.md).
# Troubleshooting Bad API Requests
## Frequently Asked Questions
### How do I fix a “No Response Received” error?
See the instructions at [Troubleshooting Network Errors](/how-to/troubleshooting/troubleshooting-network-errors.md).
### My Request works in Postman. What’s wrong?
Here are the most common reasons a request works in Postman, but doesn’t work in PixieBrix:
**Incorrect use of the data** **field in PixieBrix to pass JSON**
To pass a data payload in PixieBrix, provide an object or variable:
✅ **Correct**
❌ **Incorrect:**
**Inconsistent headers**
Postman automatically adds some headers to requests. Those headers are optional for most APIs. However, the API you’re calling might require those headers
*Uncommon: header name capitalization.* PixieBrix automatically lowercases header names. However, some APIs require certain header names to be capitalized.
**Authentication**
If your Postman request is in a Postman Collection, Postman maybe including authentication information (headers/payload) with the request
**Invalid/Self-Trusted SSL Certificate**
Your Postman might be configured not to verify the SSL certificate.
In order to enable PixieBrix to call hosts with untrusted certificates, you must instruct Chrome to trust the certificate.
* Watch: [Trusting a Self-Signed Certificate on Windows](https://www.youtube.com/watch?v=zTr64CU4wm4)
---
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