Kaal Corpus: Verifiable Claim Layer for Claude.ai

io.github.wulfkaal/corpus

Cite the claim, not the paper: 5,033 assertions, each hash-verifiable against its source PDF

client:Claude.ai transport:streamable-http runtime:mcpb tools:18

Install Kaal Corpus: Verifiable Claim Layer in Claude.ai

Settings → Connectors → Add custom connector

https://corpus.openstanding.org/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

search_papers
get_paper
papers_by_year
corpus_overview
search_posts
verify_document
how_to_cite
search_claims
get_claim
claims_on_topic
search_positions
get_position
positions_on_topic
claim_layer_overview
search_research_claims
get_research_claim
list_research_observations
get_research_observation

Kaal Corpus: Verifiable Claim Layer in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Kaal Corpus: Verifiable Claim Layer MCP server