molclaw-compound-retrieve

molclaw-compound-retrieve is a skill for Claude Code, Codex from InternScience/MolClaw. It costs 53 tokens per session (369 once invoked), scanned A, original, MIT.

A lookup tool that finds a compound's SMILES string from its name. SMILES is a text format used to represent a molecule's structure; it queries PubChem first and an NCI service if needed.

In plain words
What is it for?
Use it to retrieve structures for compounds such as aspirin or caffeine, including lists of multiple compound names.
Why use it?
It removes the need to search chemical databases manually or convert compound names yourself. Results can also show when no structure was found.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to retrieve structures for compounds such as aspirin or caffeine, including lists of multiple compound names.

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Install with agentmods
npx agentmods add skills/internscience/molclaw/molclaw-compound-retrieve
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.

Any agent
npx skills add InternScience/MolClaw --skill molclaw-compound-retrieve
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-compound-retrieve

README.md
[![agentmods](https://agentmods.dev/badge/skills/internscience/molclaw/molclaw-compound-retrieve/github.svg)](https://agentmods.dev/skills/internscience/molclaw/molclaw-compound-retrieve)
Your own site
<a href="https://agentmods.dev/skills/internscience/molclaw/molclaw-compound-retrieve"><img src="https://agentmods.dev/badge/skills/internscience/molclaw/molclaw-compound-retrieve/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/internscience/molclaw/molclaw-compound-retrieve"><img src="https://agentmods.dev/badge/skills/internscience/molclaw/molclaw-compound-retrieve.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 369 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00053 $0.00369
Opus 5.5 $0.00021 $0.00148
Sonnet 5.5 $0.00011 $0.00074
Haiku 4.5 $0.00005 $0.00037

Measured 1mo ago against content hash 90a468c108f6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

molclaw-compound-retrieve 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 1mo 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-compound-retrieve/SKILL.md · 41 lines

What it actually says

Retrieve Compound SMILES

Invocation

Use the exact tool name and parameter schema exposed by the current harness. Tool names in SDK examples below are raw MCP names, not model-facing aliases. Local files must be uploaded with molclaw-file-transfer before a server tool can use them. Repair PDB inputs first when the workflow requires it.

The description of tool retrieve_smiles_by_compoundname.

Retrieve SMILES strings by compound name. The service queries PubChem first and falls back to the NCI resolver when PubChem is busy or unavailable.
Args:
    compound_names (List[str]): List of input compound names (e.g., ["aspirin", "caffeine"])
Return:
    status (str): success/partial_success/error
    msg (str): message
    retrieve_smiles (List[dict]): List of dict, each containing the keys 'compound_name' and 'smiles'.
        --compound_name (str): A compound name of compound_names 
        --smiles (str): The retrieved SMILES string, if it exists; otherwise, None.

How to use tool retrieve_smiles_by_compoundname :

response = await client.session.call_tool(
    "retrieve_smiles_by_compoundname",
    arguments={
        "compound_names": compound_names
    }
)
result = client.parse_result(response)
retrieve_smiles = result["retrieve_smiles"]
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. 1mo ago Changed · -1 lines · +28 tokens per session 90a468c108f6
  2. 1mo ago First seen · 42 lines · 25 tokens per session scan A 7cda0782c7df

Subscribe to this mod's changes

molclaw-compound-retrieve is a skill published in the GitHub repository InternScience/MolClaw (38 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 369 once invoked, about $0.0002 per session on Opus 5.5. 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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