# Molclaw Smiles Valid Check

> Check if the input molecule SMILES string is valid.

- Skill: `internscience/molclaw-smiles-valid-check` (Agent Skill)
- Install (CLI): `npx skillmds@latest add internscience/molclaw-smiles-valid-check`
- Raw SKILL.md: https://api.skillmd.com/api/skills/internscience/molclaw-smiles-valid-check/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT license
- Author: internscience (https://skillmd.com/u/internscience)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/internscience/molclaw-smiles-valid-check

---


# Molecule SMILES Valid Check

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 *is_valid_smiles*.

```tex
Check if the input SMILES string is valid
Args:
    smiles_list (List[str]): List of input SMILES strings, (e.g., ["N[C@@H](Cc1ccc(O)cc1)C(=O)O", "CC(C)C1=CC=CC=C1"])
Return:
    status (str): success/partial_success/error
    msg (str): message
    valid_res (List[dict]): List of dict, each containing the keys 'smiles' and 'is_valid'. 
        --smiles (str): A SMILES string of smiles_list
        --is_valid (bool): Is the SMILES valid or not
```

How to use tool *is_valid_smiles* :

```python
response = await client.session.call_tool(
    "is_valid_smiles",
    arguments={
        "smiles_list": smiles_list
    }
)
result = client.parse_result(response)
valid_res = result["valid_res"]
```