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/maintenancenpx skills add cyanheads/crossref-mcp-server --skill maintenancegit 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/maintenance)<a href="https://agentmods.dev/skills/cyanheads/crossref-mcp-server/maintenance"><img src="https://agentmods.dev/badge/skills/cyanheads/crossref-mcp-server/maintenance.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 | $0.00075 | $0.04810 |
| Opus 5 | $0.00037 | $0.02405 |
| Sonnet 5 | $0.00015 | $0.00962 |
| Haiku 4.5 | $0.00007 | $0.00481 |
Grade A, and why
maintenance 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 4d 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.
- 4d ago First seen · 243 lines · 75 tokens per session scan A d86eacb0aa5a
maintenance is a skill published in the GitHub repository cyanheads/crossref-mcp-server (3 stars, last pushed 10d ago), with no licence file. It adds 75 tokens to every session and 4,810 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
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nature-academic-search
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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.
ai4scholar-文献审计助手
全方位审计参考文献列表：交叉引用匹配、格式一致性、DOI/URL 验证、期刊名核查、元数据逻辑校验、完整性检测、重复检测、自引率分析、排序校验。支持联网验证文献真实性（需 ai4scholar API Key）。.
Paper Writing Skills Index
Routing and workflow skill family for paper-writing tasks. Covers manuscript drafting, journal and conference papers, grant proposals, lab reports, group-meeting reports, talks, workshop notes, reviewer rebuttals, academic HTML/PDF/LaTeX output with editable-block contracts, citation grounding, evidence checking, and…