--- title: "pdf-reader-mcp vs book-to-skill" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/sylphxai-pdf-reader-mcp-vs-virgiliojr94-book-to-skill" tools: ["sylphxai-pdf-reader-mcp", "virgiliojr94-book-to-skill"] --- # pdf-reader-mcp vs book-to-skill *GraphCanon updated Sep 20, 2026* ## Verdict Pick pdf-reader-mcp if pdf-reader-mcp acts as an intelligence layer for PDFs to support AI agents in document handling, offering features like evidence-first extraction and OCR with a focus on accuracy and provenance via the MCP server; pick book-to-skill if book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. [pdf-reader-mcp](https://sylphxai.github.io/pdf-reader-mcp/) reports 935 GitHub stars, 82 forks, and 1 open issues, last pushed Sep 20, 2026. [book-to-skill](https://github.com/virgiliojr94/book-to-skill) has 31k stars, 3.2k forks, and 16 open issues, last pushed Sep 17, 2026. Figures are from public GitHub metadata via [pdf-reader-mcp's repository](https://github.com/SylphxAI/pdf-reader-mcp) and [book-to-skill's repository](https://github.com/virgiliojr94/book-to-skill). | | [pdf-reader-mcp](/tools/sylphxai-pdf-reader-mcp.md) | [book-to-skill](/tools/virgiliojr94-book-to-skill.md) | | --- | --- | --- | | Tagline | PDF intelligence layer for AI agents providing features such as evidence-first extraction and OCR | Converts technical book PDFs into Claude Code skills for study and reference | | Stars | 935 | 31,078 | | Forks | 82 | 3,224 | | Open issues | 1 | 16 | | Language | TypeScript | Python | | Adopt for | pdf-reader-mcp acts as an intelligence layer for PDFs to support AI agents in document handling, offering features like evidence-first extraction and OCR with a focus on accuracy and provenance via the MCP server. | book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. | | Persona | - | - | | Runtime | - | - | | License | MIT | MIT license applies to the converter code and skill definition in the repository, but not to any book or document processed with it. | | Categories | AI Agents, Data & Retrieval | AI Agents, Data & Retrieval, Developer Tools | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [pdf-reader-mcp](/tools/sylphxai-pdf-reader-mcp.md) | [book-to-skill](/tools/virgiliojr94-book-to-skill.md) | | --- | --- | --- | | Open issues (now) | 1 | 16 | | Stars delta | +96 (30d) | Unknown | | Open issues delta | 0 (30d) | Unknown | | Owner type | Organization | User | | Full report | [trust report](/tools/sylphxai-pdf-reader-mcp/trust.md) | [trust report](/tools/virgiliojr94-book-to-skill/trust.md) | ## Decision facts: pdf-reader-mcp - **Adopt for:** pdf-reader-mcp acts as an intelligence layer for PDFs to support AI agents in document handling, offering features like evidence-first extraction and OCR with a focus on accuracy and provenance via the MCP server. ## Decision facts: book-to-skill - **Pricing:** freemium - The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing. - **Requirements:** Min 2 GB RAM; Requires Python environment to run the tool. - **Adopt for:** book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. - **License detail:** MIT license applies to the converter code and skill definition in the repository, but not to any book or document processed with it. ## Choose when ### Choose pdf-reader-mcp if… - pdf-reader-mcp is primarily TypeScript; book-to-skill is Python. - Tags unique to pdf-reader-mcp: agent-document-twin, ai-tools, document-intelligence, evidence-first. - pdf-reader-mcp ships an MCP server manifest. - When working within environments that integrate Claude, Cursor, VS Code, or any other MCP client where precision in extracting visual crops and ensuring provenance through OCR is required. ### Choose book-to-skill if… - book-to-skill is primarily Python; pdf-reader-mcp is TypeScript. - Pricing: The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing.. - Requirements: Min 2 GB RAM; Requires Python environment to run the tool.. - Tags unique to book-to-skill: agent-skills, ai-agents, book-to-skill, context-engineering. - Also covers Developer Tools. - When you need to convert technical book PDFs into a format that can be easily studied and referenced using Claude Code skills. ## When NOT to use pdf-reader-mcp - For situations where you do not require the specific capabilities like evidence-first extraction or trust reporting that distinguish pdf-reader-mcp from other general OCR tools. - In scenarios where only plain text extraction is needed without advanced features such as document intelligence, visual crops, or PDF to Markdown conversion. ## When NOT to use book-to-skill - If your goal is to convert non-technical books or documents that do not require the specific format of Claude Code skills. - When you are looking for a tool that processes and converts documents into formats other than those compatible with Claude Code. ## Common questions ### What is the difference between pdf-reader-mcp and book-to-skill? pdf-reader-mcp: PDF intelligence layer for AI agents providing features such as evidence-first extraction and OCR. book-to-skill: Converts technical book PDFs into Claude Code skills for study and reference. See the comparison table for live GitHub stats and shared categories. ### When should I choose pdf-reader-mcp over book-to-skill? Choose pdf-reader-mcp over book-to-skill when pdf-reader-mcp is primarily TypeScript; book-to-skill is Python; Tags unique to pdf-reader-mcp: agent-document-twin, ai-tools, document-intelligence, evidence-first; pdf-reader-mcp ships an MCP server manifest; When working within environments that integrate Claude, Cursor, VS Code, or any other MCP client where precision in extracting visual crops and ensuring provenance through OCR is required. ### When should I choose book-to-skill over pdf-reader-mcp? Choose book-to-skill over pdf-reader-mcp when book-to-skill is primarily Python; pdf-reader-mcp is TypeScript; Pricing: The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing.; Requirements: Min 2 GB RAM; Requires Python environment to run the tool.; Tags unique to book-to-skill: agent-skills, ai-agents, book-to-skill, context-engineering; Also covers Developer Tools; When you need to convert technical book PDFs into a format that can be easily studied and referenced using Claude Code skills. ### When should I avoid pdf-reader-mcp? For situations where you do not require the specific capabilities like evidence-first extraction or trust reporting that distinguish pdf-reader-mcp from other general OCR tools. In scenarios where only plain text extraction is needed without advanced features such as document intelligence, visual crops, or PDF to Markdown conversion. ### When should I avoid book-to-skill? If your goal is to convert non-technical books or documents that do not require the specific format of Claude Code skills. When you are looking for a tool that processes and converts documents into formats other than those compatible with Claude Code. ### Is pdf-reader-mcp or book-to-skill more popular on GitHub? book-to-skill has more GitHub stars (31,078 vs 935). Stars measure visibility, not whether either tool fits your constraints. ### Are pdf-reader-mcp and book-to-skill open source? Yes - both are open-source projects on GitHub (pdf-reader-mcp: MIT, book-to-skill: MIT). ### Where can I find alternatives to pdf-reader-mcp or book-to-skill? GraphCanon lists graph-backed alternatives at [pdf-reader-mcp alternatives](/tools/sylphxai-pdf-reader-mcp/alternatives) and [book-to-skill alternatives](/tools/virgiliojr94-book-to-skill/alternatives) ([pdf-reader-mcp markdown twin](/tools/sylphxai-pdf-reader-mcp/alternatives.md), [book-to-skill markdown twin](/tools/virgiliojr94-book-to-skill/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/sylphxai-pdf-reader-mcp-vs-virgiliojr94-book-to-skill.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, pdf-reader-mcp or book-to-skill? pdf-reader-mcp: Very active. book-to-skill: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for pdf-reader-mcp and book-to-skill? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [pdf-reader-mcp trust report](/tools/sylphxai-pdf-reader-mcp/trust); [book-to-skill trust report](/tools/virgiliojr94-book-to-skill/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=sylphxai-pdf-reader-mcp`](/api/graphcanon/graph?tool=sylphxai-pdf-reader-mcp) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_