1 min lesson
Network and HAR captures
Connect "The DevTools Network tab (or an exported HAR) shows the status codes that name the cause" to the decision you would make.
Step 1 of 3
Network and HAR capturesfor auth, model and connectivity failures
When the failure smells like the network - sign-in loops, model errors, dropped completions - capture the requests. The DevTools Network tab (or an exported HAR) shows the status codes that name the cause.
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Advanced table
Reference table
- Status
- 401 / 403
- Likely meaning
- Auth token invalid or rejected
- Where you'd look next
- SSOSingle Sign-On. One company login (usually via SAML or OIDC) instead of a separate password per tool. Press Enter for the full definition. config, expired session, privacy policy
- Status
- 407
- Likely meaning
- Proxy authentication required
- Where you'd look next
- Corporate proxy credentials and allowlist
- Status
- 429
- Likely meaning
- Rate limited
- Where you'd look next
- Plan tier, usage caps, retry behavior
- Status
- Timeout / ECONNRESET
- Likely meaning
- Connection blocked or dropped
- Where you'd look next
- Firewall, VPN, blocked endpoint
- Status
- TLS / cert error
- Likely meaning
- Interception or clock skew
- Where you'd look next
- Corporate MITM proxy, system time
| Status | Likely meaning | Where you'd look next |
|---|---|---|
| 401 / 403 | Auth token invalid or rejected | SSOSingle Sign-On. One company login (usually via SAML or OIDC) instead of a separate password per tool. Press Enter for the full definition. config, expired session, privacy policy |
| 407 | Proxy authentication required | Corporate proxy credentials and allowlist |
| 429 | Rate limited | Plan tier, usage caps, retry behavior |
| Timeout / ECONNRESET | Connection blocked or dropped | Firewall, VPN, blocked endpoint |
| TLS / cert error | Interception or clock skew | Corporate MITM proxy, system time |
A status code turns "the internet is broken" into a named, routable cause.