# Anthropic: Elevated TCP three-way handshake failures on api.anthropic.com

> Anthropic status incident “Elevated TCP three-way handshake failures on api.anthropic.com” on 2026-03-06: impact minor (vendor’s label), 49 min, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12
Last updated: 2026-03-06T16:23:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-03-06 15:34 UTC · Resolved: 2026-03-06 16:23 UTC · Duration: 49 min
- Updates: 1
- [Vendor status page: https://status.anthropic.com/incidents/htjkfrfnzq12](https://status.anthropic.com/incidents/htjkfrfnzq12)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **resolved** 2026-03-06 16:23 UTC: This incident has been resolved.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by Anthropic, started 2026-03-06 15:34 UTC, resolved after 49 min, 1 update(s).

- Canonical URL: https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12
- Citation: Anthropic, “Elevated TCP three-way handshake failures on api.anthropic.com” (2026-03-06 15:34 UTC). Archived by Rewindex: https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12 (CC BY 4.0).
- Markdown link: `[Anthropic: Elevated TCP three-way handshake failures on api.anthropic.com (2026-03-06)](https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12)`


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Canonical: https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12 · Markdown: https://rewindex.com/company/anthropic/incidents/htjkfrfnzq12.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/htjkfrfnzq12 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T18:10:41.008Z