Keystone
What an arXiv paper builds on, disputes and assumes, read verbatim from its LaTeX. No LLM.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"keystone": {
"url": "https://keystone-research.vercel.app/api/mcp"
}
}
}Remote endpoints
https://keystone-research.vercel.app/api/mcpstreamable-httpWhat it can do
Tool inventory
Tools (3)
🟢search_library(query, stance, limit)
Search 2118 readings taken from 197 arXiv papers' LaTeX source: citation stances (adopts, extends, disputes, measures against) and stated assumptions. Matches on the quoted sentence, the cue phrase that decided it, and the work cited. Returns the sentence verbatim with a link to the exact line.
Input Schema
{
"type": "object",
"properties": {
"query": {
"type": "string",
"description": "Text to look for, e.g. 'layer normalization'"
},
"stance": {
"type": "string",
"enum": [
"inherits",
"extends",
"contests",
"compares",
"background",
"bare",
"cited",
"shown"
],
"description": "Optional filter. The first five are citation stances; bare/cited/shown are what an assumption's own sentence offers for it."
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"description": "Default 15."
}
},
"required": [
"query"
],
"additionalProperties": false
}🟢read_paper(arxiv_id, include)
Everything Keystone reads out of one arXiv paper: what it adopts, extends, disputes and measures against, and the assumptions it states with a citation, its own evidence, or nothing at all. Works for any paper on arXiv that ships LaTeX source — one outside the library is parsed on demand, which takes a few seconds. Nothing is summarised or inferred; every line is the paper's own.
Input Schema
{
"type": "object",
"properties": {
"arxiv_id": {
"type": "string",
"description": "An arXiv id or link, e.g. 1706.03762"
},
"include": {
"type": "string",
"enum": [
"all",
"citations",
"assumptions"
],
"description": "Default all."
}
},
"required": [
"arxiv_id"
],
"additionalProperties": false
}🟡list_disagreements(kind, limit)
Every sentence in the library where a paper says prior work is wrong, or puts itself beside it to win. Small on purpose — disagreement is rare and concentrated, and the whole set is readable.
Input Schema
{
"type": "object",
"properties": {
"kind": {
"type": "string",
"enum": [
"disputes",
"comparisons"
],
"description": "Default disputes."
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 100,
"description": "Default 40."
}
},
"additionalProperties": false
}Community
Evidence