Kaal Corpus: Verifiable Claim Layer

blockers

corpus.openstanding.org

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

https://corpus.openstanding.org/mcpWebsiteUnknownMCP 2025-11-25v1.28.1last checked 18 Oct 2026spoke MCP on 91.8% of 85 checks (30 days)initialize in 558 ms

How to authenticate

Checked against the endpoint by our probe on 18 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	Unknown
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Refused — credentials required

What the probe found

blockerThe endpoint answered 530, not MCP

Expected a JSON-RPC response; got 17 bytes of text/plain; charset=UTF-8. Streamable HTTP endpoints accept a POST at the same URL a client connects to.

Tools

claim_layer_overviewclaims_on_topiccorpus_overviewget_claimget_paperget_positionget_research_claimget_research_observationhow_to_citelist_research_observationspapers_by_yearpositions_on_topicsearch_claimssearch_paperssearch_positionssearch_postssearch_research_claimsverify_document

Contract history

6 Sep 2026v1.28.11 cosmeticinstructions rewritten

Instructions rewritten: search_research_claims. The description an agent follows changed; the callable contract may not have.

2 Sep 2026v1.28.1first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/kaal-corpus-verifiable-claim-layer/badge.svg)](https://mcpi.app/servers/kaal-corpus-verifiable-claim-layer)