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 agentmods add skills/learningmatter-mit/atomisticskills/general-chemical-pricingnpx skills add learningmatter-mit/AtomisticSkills --skill general-chemical-pricinggit clone --depth 1 https://github.com/learningmatter-mit/AtomisticSkillsWrote 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/learningmatter-mit/atomisticskills/general-chemical-pricing)<a href="https://agentmods.dev/skills/learningmatter-mit/atomisticskills/general-chemical-pricing"><img src="https://agentmods.dev/badge/skills/learningmatter-mit/atomisticskills/general-chemical-pricing.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00023 | $0.00481 |
| Opus 5 | $0.00012 | $0.00241 |
| Sonnet 5 | $0.00005 | $0.00096 |
| Haiku 4.5 | $0.00002 | $0.00048 |
Grade A, and why
general-chemical-pricing 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 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.
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.
How it starts
The opening of the file, as written. The whole thing — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.
General Chemical Pricing
Goal
To programmatically query averaged bulk commodity prices for pure chemical elements (in USD/kg) and to retrieve direct chemical vendor links for ordering specific precursor compounds or elemental forms.
Instructions
1. Get Pricing and Vendor Links
Use this script to search for the pricing details of a given element or chemical compound. The script aggregates Wikipedia's USGS elemental data with PubChem's registered supplier vendor lists.
# Env: base-agent
python .agents/skills/general-chemical-pricing/scripts/get_pricing.py <Query Name or Symbol>
Parameters:
<Query Name or Symbol>: The name, symbol, or full compound name (e.g., "Lithium", "Li", "Lithium carbonate", "Li2CO3"). Ensure multi-word compounds are wrapped in quotes (e.g.,"Lithium carbonate").
Examples
See examples/lithium-carbonate/README.md for a complete run of querying elemental lithium alongside a molecular precursor.
Constraints
- Environments: The script requires the
base-agentConda environment because it uses standard requests, beautifulsoup4, and pubchempy libraries. Each code block MUST specify the environment. - Price Precision: Elemental bulk prices presented are averaged and highly dependent on market fluctuations and the reference year (scraped dynamically from Wikipedia's USGS Mineral Commodity list).
- Vendor Links: For compounds, live price points are not freely accessible via unauthenticated APIs. The skill provides a robust PubChem URL that aggregates active supplier links where live pricing can be interactively observed.
References
- USGS Mineral Commodity Summaries (via Wikipedia). Prices of chemical elements
- PubChem PUG REST API for retrieving CIDs. PubChem API
Author: Bowen Deng Contact: GitHub @learningmatter-mit
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 41 lines · 23 tokens per session scan A 14fce3cced54
general-chemical-pricing is a skill published in the GitHub repository learningmatter-mit/AtomisticSkills (161 stars, last pushed 3d ago), licensed MIT. It adds 23 tokens to every session and 481 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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