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/cyanheads/crossref-mcp-server/api-canvasnpx skills add cyanheads/crossref-mcp-server --skill api-canvasgit clone --depth 1 https://github.com/cyanheads/crossref-mcp-serverWrote 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/cyanheads/crossref-mcp-server/api-canvas)<a href="https://agentmods.dev/skills/cyanheads/crossref-mcp-server/api-canvas"><img src="https://agentmods.dev/badge/skills/cyanheads/crossref-mcp-server/api-canvas.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 | $0.00085 | $0.07799 |
| Opus 5 | $0.00043 | $0.03900 |
| Sonnet 5 | $0.00017 | $0.01560 |
| Haiku 4.5 | $0.00009 | $0.00780 |
Grade A, and why
api-canvas 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 3d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 3d ago First seen · 556 lines · 85 tokens per session scan A a15da8c76763
api-canvas is a skill published in the GitHub repository cyanheads/crossref-mcp-server (3 stars, last pushed 9d ago), with no licence file. It adds 85 tokens to every session and 7,799 once invoked, about $0.0004 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 2026-08-31.
Other skills, from other repositories
academic-research
Nested swiss-knife reference for academic literature work — find papers, fetch full-text PDFs, trace citations, write LaTeX manuscripts. First action for any "get me this paper" request: python3 /scripts/fetchpaper.py — walks arXiv → Unpaywall → Europe PMC → CORE → in-house publisher-page extraction…
nature-academic-search
Use when users ask to 找文献、做文献检索、查论文、查临床试验、核验引用、去重文献、设计 PubMed/MeSH 检索式、追踪上下游引文、解析 DOI/PMID/PMCID/arXiv/OpenAlex/Semantic Scholar/NCT ID， 或导出 RIS、BibTeX、NBIB、ENW；also use for multi-source academic search, citation verification, citation graphs, trial registration search, research workflows, or DeepSeek Harness…
paper-verify-webchat
Use when the user asks to fact-check, verify, or score the citations/sources/references in a document from a chat (no terminal) — extracts citations with bundled code, fetches and judges each source with web tools, then scores through paper-verify's standard 100-point rubric via --from-evidence.
paper-verify
Use when the user asks to verify citations, audit source links, check blog/report/lecture references, or reduce a long bibliography to sources that need human review using the paper-verify CLI or MCP tools.
figure-table-checker
Check, improve, and ensure compliance of figures and tables in academic papers. Use this skill whenever the user needs to verify figure or table formatting, choose error bar types, check colorblind accessibility, ensure APA or journal-specific compliance, create CONSORT or PRISMA flow diagrams, or fix common figure…
statistical-reporting
Report statistical results accurately and completely for any academic discipline. Use this skill whenever the user needs to write up statistics in APA 7th or other styles, report effect sizes, describe power analyses, interpret Bayesian factors, check reporting against CONSORT/STROBE/PRISMA/ARRIVE guidelines, or…