Ketcher Chemistry (Claude Science Connector)

Provides an interactive 2D chemical-structure sketcher based on EPAM’s open-source Ketcher, offered inside Claude Science.

Type	Claude.ai Connector
Supplier	EPAM Systems
Availability	GA — Anthropic-hosted connector (EPAM component)
Pricing	Free / OSS (Apache-2.0)
Capabilities	Read/Write — draw, edit, and export molecular structures (SMILES/MOL)
Verified	works · 2026-07-27
Security	cleared · 2026-07-27 — Anthropic-hosted connector; epam/ketcher repo live and Apache-2.0 (GitHub API); client-side editor, no credentials

How to install

• Claude Science — enable the Ketcher Chemistry connector to sketch and edit structures interactively.
• Standalone / embed — Ketcher is an open-source JS component, not a data API:

  npm install ketcher-react ketcher-standalone
  

  See epam/ketcher to embed it in your own app.

What it does

An interactive 2D molecule editor: draw and edit chemical structures and reactions, and export/import as SMILES, MOL/RXN, or other cheminformatics formats. It is a UI component rather than a queryable data source.

Primary use cases: Structure drawing, molecule editing, SMILES/MOL export for downstream tools

Notes

Claude Science: Offered inside Anthropic’s Claude Science via the Ketcher Chemistry featured connector. Its inclusion there is an independent signal of quality and trustworthiness for life-science research.

Ketcher is a JS UI component (npm ketcher-react), maintained by EPAM Systems. Unlike the other Claude Science chemistry sources, it is an editor, not a database.

Sources

• epam/ketcher
• Ketcher
• Anthropic — Claude Science: Connectors and skills

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