molclaw-esmfold

molclaw-esmfold is a skill for Claude Code, Codex from InternScience/MolClaw. It costs 24 tokens per session (261 once invoked), scanned A, original, MIT.

A protein-structure prediction tool that uses ESMFold to estimate a protein's three-dimensional shape from its amino-acid sequence. It returns a PDB file, a standard file format for storing molecular structures.

In plain words
What is it for?
Use it to submit a protein sequence and retrieve the predicted structure. Files must be uploaded to the server first, and existing PDB files may need preparation with the related PDB fixer tool.
Why use it?
It turns a protein sequence into a predicted 3D structure, so you do not have to create that structure manually.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/internscience/molclaw/molclaw-esmfold
Any agent
npx skills add InternScience/MolClaw --skill molclaw-esmfold
Clone the repo
git clone --depth 1 https://github.com/InternScience/MolClaw

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for molclaw-esmfold

README.md
[![agentmods](https://agentmods.dev/badge/skills/internscience/molclaw/molclaw-esmfold.svg)](https://agentmods.dev/skills/internscience/molclaw/molclaw-esmfold)
Your own site
<a href="https://agentmods.dev/skills/internscience/molclaw/molclaw-esmfold"><img src="https://agentmods.dev/badge/skills/internscience/molclaw/molclaw-esmfold.svg" alt="Measured on agentmods" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 261 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00024 $0.00261
Opus 5 $0.00012 $0.00130
Sonnet 5 $0.00005 $0.00052
Haiku 4.5 $0.00002 $0.00026

Measured 5d ago against content hash 06283180274c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

molclaw-esmfold scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/L1_tools/molclaw-esmfold/SKILL.md · 40 lines

What it actually says

Protein Structure Prediction

Note:

  • Local files are not directly accessible by the server. Please upload them to the server using molclaw-file-transfer before execution.
  • For PDB file inputs, it is recommended to preprocess them using molclaw-pdbfixer before execution.
  • Please refer to skill molclaw-scp-server to complete tool invocation.

The description of tool pred_protein_structure_esmfold.

Use the ESMFold model for protein 3D structure prediction.
Args:
    sequence (str): Protein sequence
Return:
    status: success/error
    msg: message
    pdb_path (str): The predicted pdb file path

How to use tool pred_protein_structure_esmfold :

response = await client.session.call_tool(
    "pred_protein_structure_esmfold",
    arguments={
        "sequence": sequence
    }
)
result = client.parse_result(response)
pred_protein_structure = result["pdb_path"]
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 40 lines · 24 tokens per session scan A 06283180274c

Subscribe to this mod's changes

molclaw-esmfold is a skill published in the GitHub repository InternScience/MolClaw (33 stars, last pushed 29d ago), licensed MIT. It adds 24 tokens to every session and 261 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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