Agent skill

Molecular Property Profiling

by InternScience in InternScience/scp

Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics.

MITAuto-check passedBusiness, Finance & HR

Install Molecular Property Profiling

skills CLI
$ npx skills add InternScience/scp --skill molecular-property-profiling -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install InternScience/scp molecular-property-profiling --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/InternScience/scp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/molecular-property-profiling .claude/skills/molecular-property-profiling && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
molecular-property-profiling
GitHub stars
169
Used in
1 other repo
Token cost
~1.7k tokens
SKILL.md length
334 words
Files
1
Skills in repo
73
Repo updated
First seen
Licence
MIT

At a glance

Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics.

  • Works in 2 steps: MCP Server Definition → Comprehensive Molecular Property Analysis
  • Tasks that involve Real estate
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Molecular Property Profiling is an agent skill from InternScience/scp. Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics.

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Business, Finance & HR, covering Real estate. The licence is MIT.

When your agent uses it

  • Tasks that involve Real estate

Example prompts

  • “/molecular-property-profiling”

Requirements

  • Python 3

Workflow steps

2 steps, taken from the step headings in SKILL.md.

  1. MCP Server Definition
  2. Comprehensive Molecular Property Analysis

What it can do on your machine

Read from SKILL.md and the folder at commit cea5398. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are python).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Molecular Property Profiling loads about 1.7k tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 334 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~53
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from InternScience/scp at commit cea5398, republished under its MIT licence (© InternScience). 334 words, ~1,676 tokens.

Download SKILL.mdSave it as .claude/skills/molecular-property-profiling/SKILL.md (or your agent's skills folder).
name
molecular-property-profiling
description
Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics.
license
MIT license
metadata.skill-author
PJLab

Molecular Property Profiling Workflow

Usage

1. MCP Server Definition

Use the same DrugSDAClient class as defined in previous skills.

2. Comprehensive Molecular Property Analysis

This workflow computes a comprehensive set of molecular descriptors across 8 different categories, providing a complete molecular profile for QSAR modeling, drug discovery, and molecular analysis.

Workflow Steps:

  1. Basic Properties - Molecular formula, weight, atom counts, bond counts
  2. Hydrophobicity - LogP, molar refractivity, lipophilicity descriptors
  3. Hydrogen Bonding - H-bond donors/acceptors, TPSA
  4. Structural Complexity - Ring counts, aromatic rings, rotatable bonds
  5. Topological Descriptors - Chi indices, Kappa shape indices
  6. Drug Chemistry - QED score, Lipinski violations
  7. Charge Properties - Gasteiger charges, formal charge
  8. Complexity Metrics - Molecular complexity, asphericity

Implementation:

python
from collections import defaultdict

def merge_lists_by_smiles(*lists):
    """Merge multiple descriptor lists by SMILES key"""
    merged = defaultdict(dict)
    for lst in lists:
        for d in lst:
            smiles = d['smiles']
            merged[smiles].update(d)
    return list(merged.values())

client = DrugSDAClient("https://scp.intern-ai.org.cn/api/v1/mcp/2/DrugSDA-Tool")
if not await client.connect():
    print("connection failed")
    return

## Input: List of SMILES strings
smiles_list = [
    'Nc1nnc(S(=O)(=O)NCCc2ccc(O)cc2)s1',
    'COc1ccc2c(=O)cc(C(=O)N3CCN(c4ccc(F)cc4)CC3)oc2c1',
    'CCCC1CCC(CC(=O)Cl)(C2CCCCC2)CC1'
]

## Step 1: Calculate basic molecular properties
result = await client.session.call_tool(
    "calculate_mol_basic_info",
    arguments={"smiles_list": smiles_list}
)
basic_metrics = client.parse_result(result)['metrics']

## Step 2: Calculate hydrophobicity descriptors
result = await client.session.call_tool(
    "calculate_mol_hydrophobicity",
    arguments={"smiles_list": smiles_list}
)
hydrophobicity_metrics = client.parse_result(result)['metrics']

## Step 3: Calculate hydrogen bonding properties
result = await client.session.call_tool(
    "calculate_mol_hbond",
    arguments={"smiles_list": smiles_list}
)
hbond_metrics = client.parse_result(result)['metrics']

## Step 4: Calculate structural complexity
result = await client.session.call_tool(
    "calculate_mol_structure_complexity",
    arguments={"smiles_list": smiles_list}
)
structure_metrics = client.parse_result(result)['metrics']

## Step 5: Calculate topological descriptors
result = await client.session.call_tool(
    "calculate_mol_topology",
    arguments={"smiles_list": smiles_list}
)
topology_metrics = client.parse_result(result)['metrics']

## Step 6: Calculate drug chemistry properties
result = await client.session.call_tool(
    "calculate_mol_drug_chemistry",
    arguments={"smiles_list": smiles_list}
)
chemistry_metrics = client.parse_result(result)['metrics']

## Step 7: Calculate charge properties
result = await client.session.call_tool(
    "calculate_mol_charge",
    arguments={"smiles_list": smiles_list}
)
charge_metrics = client.parse_result(result)['metrics']

## Step 8: Calculate complexity metrics
result = await client.session.call_tool(
    "calculate_mol_complexity",
    arguments={"smiles_list": smiles_list}
)
complexity_metrics = client.parse_result(result)['metrics']

## Merge all descriptors by SMILES
complete_profiles = merge_lists_by_smiles(
    basic_metrics,
    hydrophobicity_metrics,
    hbond_metrics,
    structure_metrics,
    topology_metrics,
    chemistry_metrics,
    charge_metrics,
    complexity_metrics
)

## Display results
for profile in complete_profiles:
    print(f"\nSMILES: {profile['smiles']}")
    print(f"Molecular Formula: {profile['molecular_formula']}")
    print(f"Molecular Weight: {profile['molecular_weight']:.2f}")
    print(f"LogP: {profile['logp']:.2f}")
    print(f"QED Score: {profile['qed']:.4f}")
    print(f"H-Bond Donors: {profile['num_h_donors']}")
    print(f"H-Bond Acceptors: {profile['num_h_acceptors']}")
    print(f"TPSA: {profile['tpsa']:.2f}")
    print(f"Lipinski Violations: {profile['lipinski_rule_of_5_violations']}")

await client.disconnect()
Descriptor Categories
1. Basic Properties
  • molecular_formula: Molecular formula
  • molecular_weight: Molecular weight (Da)
  • num_heavy_atoms: Count of non-hydrogen atoms
  • num_atoms, num_bonds: Total atom and bond counts
  • formal_charge: Overall formal charge
2. Hydrophobicity
  • logp: Partition coefficient (lipophilicity)
  • molar_refractivity: Molar refractivity
  • fraction_csp3: Fraction of sp3 carbons (saturation)
3. Hydrogen Bonding
  • num_h_donors: H-bond donor count
  • num_h_acceptors: H-bond acceptor count
  • tpsa: Topological polar surface area (Ų)
4. Structural Complexity
  • num_rings, num_aromatic_rings: Ring counts
  • num_rotatable_bonds: Flexible bonds
  • num_heteroatoms: Non-C/H atoms
5. Topological Descriptors
  • chi0v-chi4v: Chi connectivity indices
  • kappa1-kappa3: Kappa shape indices
  • hall_kier_alpha: Hall-Kier alpha value
6. Drug Chemistry
  • qed: Quantitative Estimate of Drug-likeness (0-1)
  • lipinski_rule_of_5_violations: Lipinski violations (0-4)
7. Charge Properties
  • min/max/avg_gasteiger_charge: Gasteiger partial charges
  • gasteiger_charge_range: Charge distribution range
8. Complexity Metrics
  • molecular_complexity: Bertz complexity index
  • aromatic_proportion: Fraction of aromatic atoms
  • asphericity: 3D shape asphericity
Input/Output

Input:

  • smiles_list: List of SMILES strings

Output:

  • List of dictionaries, each containing 50+ molecular descriptors for one molecule
Applications
  • QSAR Modeling: Use descriptors as features for predictive models
  • Drug Discovery: Screen compounds by drug-likeness and physicochemical properties
  • Chemical Space Analysis: Visualize and cluster molecules by properties
  • Lead Optimization: Track property changes during optimization
  • Virtual Screening: Filter libraries by desired property ranges
Property Filters for Drug-likeness

Typical ranges for oral drug candidates:

  • Molecular Weight: 150-500 Da
  • LogP: 0-5
  • H-Bond Donors: ≤ 5
  • H-Bond Acceptors: ≤ 10
  • TPSA: 20-140 Ų
  • Rotatable Bonds: ≤ 10
  • QED Score: > 0.5

© InternScience, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/molecular-property-profiling of InternScience/scp.

Open the folder on GitHubat commit cea5398

Used in 2 other repositories

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in InternScience/scp, which our catalogue first saw on October 7, 2026.

Compare with similar skills

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Questions about Molecular Property Profiling

What does Molecular Property Profiling do?

Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics. Molecular Property Profiling is an agent skill from InternScience/scp. Comprehensive molecular property analysis covering basic info, hydrophobicity, H-bonding, structural complexity, topology, drug-likeness, charge distribution, and complexity metrics.

When should I use Molecular Property Profiling?

Molecular Property Profiling fits situations like: tasks that involve Real estate.

How do I install Molecular Property Profiling in Claude Code?

Run `npx skills add InternScience/scp --skill molecular-property-profiling -a claude-code`. Or copy the skill folder (skills/molecular-property-profiling in InternScience/scp) into .claude/skills/molecular-property-profiling in your project. Claude Code loads it when a task matches its description.

How do I install Molecular Property Profiling in Codex?

Run `npx skills add InternScience/scp --skill molecular-property-profiling -a codex`. Or copy the skill folder (skills/molecular-property-profiling in InternScience/scp) into .agents/skills/molecular-property-profiling in your project. Codex loads it when a task matches its description.

Can I use Molecular Property Profiling in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add InternScience/scp --skill molecular-property-profiling -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/molecular-property-profiling, .gemini/skills/molecular-property-profiling, .github/skills/molecular-property-profiling and .opencode/skills/molecular-property-profiling in your project.

What does Molecular Property Profiling need to run?

SKILL.md names no scripts, command-line tools or credentials: Molecular Property Profiling is instructions for the agent only. Our summary lists: Python 3.

Does Molecular Property Profiling access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Molecular Property Profiling safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Molecular Property Profiling use?

Molecular Property Profiling is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Molecular Property Profiling use?

About 1.7k tokens (SKILL.md is roughly 6.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Molecular Property Profiling?

Skills that share tags, products or a category with Molecular Property Profiling: Thue Tncn Vietnam (dotanminh/thue-tncn-vietnam, 241 stars), Apartment Finder (hanzili/hanzi-browse, 177 stars), Realestate Commercial (zubair-trabzada/ai-realestate-claude, 177 stars) and Vet PR (etewiah/awesome-real-estate, 374 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Molecular Property Profiling?

InternScience (a GitHub organization) maintains it in InternScience/scp, which has 169 GitHub stars. The repository holds 73 skills in this directory. The repository was last updated on June 3, 2026.

Source: InternScience/scp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.