The JapanFold skill

To fold and design from your AI agent instead of writing HTTP calls, install the JapanFold skill: a single SKILL.md built on the open Agent Skills standard. It teaches your agent the API, so you can ask in plain language.

Install

One line installs it into any compatible harness (Claude Code, Cursor, Codex, Gemini CLI, Cline, Windsurf, Copilot, Amp and more):

npx skills add japanfold/japanfold          # this project
npx skills add japanfold/japanfold -g       # global: every project / new chat

• Target specific agents: -a claude-code, -a cursor, -a codex, -a '*' (all).
• No installer? It's just a file. Drop SKILL.md into your agent's skills directory (e.g. ~/.claude/skills/japanfold/SKILL.md).

Claude Code plugin marketplace

Install it as a managed plugin (auto-updates via /plugin marketplace update):

claude plugin marketplace add japanfold/japanfold
claude plugin install japanfold@japanfold

Restart Claude Code, then just ask it to fold or design.

Claude Science

Manage skills in-app, no installer. Customize → Skills, add from the repo (or paste SKILL.md), and publish. If egress is sandboxed, approve the host api.japanfold.com.

Use

Once installed, ask in plain language:

"Fold this sequence with Boltz-2 and report the confidence: MKTAYIAK…"

"Co-fold this protein with aspirin and estimate the binding affinity."

"Design 10 nanobody binders against this target."

"Embed these sequences with ESMC-600M and save the pooled vectors."

Or invoke it explicitly where supported: /japanfold.

The API is public and self-describing, so you can also skip the skill entirely and just tell your agent: "use the JapanFold API at api.japanfold.com to fold …".