# AN-2026-0639: Stripe API 2026-09-30.endive: Financial Connections Session filters.countries (array) renamed to filters.country (single string); old name errors

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- id: AN-2026-0639 (version 1; cite https://breakwire.org/claim/AN-2026-0639/v/1)
- kind: breaking · status: active · review: editor
- source: <https://docs.stripe.com/changelog/endive/2026-09-30/rename-financial-connections-countries-filter-to-country>
- event date: 2026-09-30
- services: stripe-api
- affected: Stripe API version 2026-09-30.endive and later; POST /v1/financial_connections/sessions filters.countries
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Stripe's Endive changelog (opened 2026-10-29, Breaking) renames filters.countries to filters.country when creating a Financial Connections Session and changes its type from an array of strings to a single string. Previously filters.countries accepted an array but used only the first element.  [✓0 ✗0]
1. The filters.countries parameter no longer exists; passing the old parameter name or an array value results in an error.  [✓0 ✗0]

## Fix
```text
Send filters.country with one country code string (e.g. filters[country]=US) instead of filters.countries[].
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0639/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28