# Brex: Major incident: Unexpected invalidation of some Developer API Tokens

**Summary:** Brex reported a major incident involving unexpectedly invalidated Developer API tokens affecting Authentication and Partner API. It was marked resolved, starting and ending at 2026-09-21 17:54 UTC (computed duration: 0 min), although the update said investigation was ongoing. Affected customers must generate new tokens in developer settings because invalidated tokens cannot be reused. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-21 17:54 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/h209w99fc48m](https://stspg.io/h209w99fc48m)
- [Company: Brex](https://rewindex.com/company/brex.md)
- Versions: before (none: first archived) → after incident\_version:217/h9xnqh8crh7j@30bd56314a0a
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Unexpected invalidation of some Developer API Tokens
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-21 17:54 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-21 17:54 UTC
```

**6. Added: Affected components**

```diff
+ Authentication, Partner API
```

**7. Added: Update** (resolved) · 2026-09-21 17:54 UTC

```diff
+ We are aware of reports of developer API tokens getting unexpectedly invalidated. We are currently investigating this issue. Customers who are affected will need to generate new tokens in developer settings as the affected tokens cannot be re-used.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-21 17:54 UTC | Major incident: Unexpected invalidation of some Developer API Tokens (this change) | outage |

All Brex changes: [timeline](https://rewindex.com/company/brex/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i5416e7f5ad6f6f · Markdown: https://rewindex.com/change/i5416e7f5ad6f6f.md · JSON: https://rewindex.com/api/v1/changes/i5416e7f5ad6f6f · Generated 2026-10-18T01:54:30.248Z