[Bug] Anthropic API Error: 500 Internal Server Error

**Bug Description**
▘▘ ▝▝ /Users/pavlecoric

▎ Using Fable 5.1 (from .claude/settings.json) · /model

❯ alright lets pick up debugging sluice. i don't believe that we need a new api key. i think you have the tools to create a working operation that writes custom fields via api to contacts in apollo. figure it out

I'll start by reading the 2026-09-16 session log and the relevant memory files to reload where the write path stalled.

Read 3 files, ran 1 shell command, recalled 4 memories

Memory is loaded. Now the session log's resume checklist, the defect write-up, and a scan of the Lemma docs mirror for a raw HTTP call type or credential injection into Functions.

Ran 1 shell command

⏺ API Error: 500 Internal server error. This is a server-side issue, usually temporary — try again in a moment. If it persists, check https://status.claude.com.

✻ Sautéed for 1m 37s · done 6:07 PM

**Environment Info**
- Platform: darwin
- Terminal: Apple_Terminal
- Version: 2.1.273
- Feedback ID: 58267164-5059-410c-9b59-839970e0efd2

**Errors**
```json
[]
```

Start by reproducing the failure in Claude Code using the reported Fable 5.1 configuration and the session context around the 2026-09-16 log. Check the reported feedback ID and Anthropic status page, then determine whether the 500 is reproducible and capture actionable error details; done means identifying a confirmed cause or a useful reproduction.

Written by the indexing model from the issue text.