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.
npx skills add wentorai/research-plugins --skill pubchem-api-guidegit clone --depth 1 https://github.com/wentorai/research-pluginsWrote 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.
[](https://agentmods.dev/skills/wentorai/research-plugins/pubchem-api-guide)<a href="https://agentmods.dev/skills/wentorai/research-plugins/pubchem-api-guide"><img src="https://agentmods.dev/badge/skills/wentorai/research-plugins/pubchem-api-guide/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.
<a href="https://agentmods.dev/skills/wentorai/research-plugins/pubchem-api-guide"><img src="https://agentmods.dev/badge/skills/wentorai/research-plugins/pubchem-api-guide.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Supply Chain · line 29 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
- high Supply Chain · line 56 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
- high Supply Chain · line 63 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
- high Supply Chain · line 72 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
- high Supply Chain · line 81 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00019 | $0.01962 |
| Opus 5 | $0.00010 | $0.00981 |
| Sonnet 5 | $0.00004 | $0.00392 |
| Haiku 4.5 | $0.00002 | $0.00196 |
Grade A, and why
pubchem-api-guide scanned grade A with 1 finding 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 6d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl "https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/aspirin/JSON" How it starts
The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PubChem PUG REST API Guide
Overview
PubChem is the world's largest free chemistry database, maintained by the National Center for Biotechnology Information (NCBI) at the U.S. National Library of Medicine. It contains information on over 115 million chemical compounds, 300 million substances from hundreds of data sources, and over 1.5 million bioassay experiments. PubChem is a critical resource for researchers in chemistry, pharmacology, drug discovery, toxicology, and related life sciences.
The PUG REST (Power User Gateway RESTful) API provides programmatic access to PubChem's three primary databases: Compound (standardized chemical structures), Substance (depositor-provided records), and BioAssay (biological screening results). The API supports searches by name, molecular formula, structure similarity, substructure, and various identifiers including CID, SID, InChI, and SMILES.
PUG REST is entirely free, requires no authentication, and returns data in JSON, XML, CSV, SDF, and other formats. It is designed for both simple lookups and complex cheminformatics workflows.
Authentication
No authentication is required. PubChem PUG REST is a free public service.
# No API key needed
curl "https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/aspirin/JSON"
Core Endpoints
Get Compound by Name
GET https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/{name}/JSON
curl -s "https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/caffeine/JSON" \
| python3 -m json.tool
Get Compound Properties
Retrieve specific properties for a compound by CID.
GET https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/{cid}/property/{properties}/JSON
Available properties: MolecularFormula, MolecularWeight, CanonicalSMILES, InChI, InChIKey, IUPACName, XLogP, ExactMass, HBondDonorCount, HBondAcceptorCount, RotatableBondCount, TPSA
curl -s "https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/ibuprofen/property/MolecularFormula,MolecularWeight,CanonicalSMILES,IUPACName,XLogP/JSON" \
| python3 -m json.tool
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.
- 6d ago First seen · 181 lines · 19 tokens per session scan A ee489ef10c9f
pubchem-api-guide is a skill published in the GitHub repository wentorai/research-plugins (291 stars, last pushed 2mo ago), licensed MIT. It adds 19 tokens to every session and 1,962 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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