Raras is answering right now. Last checked 10 min ago. It exposes 20 tools. Last commit 21 May 2026.
Disease Twin — Brazil's rare-disease knowledge graph (10,468) over MCP. Source-grounded, PT-BR.
What changed 1
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 15 August 2026. No other catalogue keeps this.
What the code does
We read the source, 21 h ago · tools taken from the live server · rules 3dff92dd89df
Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.
'http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token',
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found things in this code
Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Raras and you get told the day something new turns up.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.
claude mcp add raras --transport http https://raras.org/api/mcp{
"mcpServers": {
"raras": {
"url": "https://raras.org/api/mcp"
}
}
}[mcp_servers.raras]
url = "https://raras.org/api/mcp"{
"mcpServers": {
"raras": {
"url": "https://raras.org/api/mcp"
}
}
}{
"mcpServers": {
"raras": {
"url": "https://raras.org/api/mcp"
}
}
}Available tools 20
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
find_diseases_by_phenotypes
search_diseases
find_papers_for_disease
search_papers_semantic
find_active_trials
analyze_clinical_case
get_disease_detail
get_evidence
explain_relation
get_graph_stats
get_hypotheses
get_literature_relations
search_phenotypes
find_phenotypically_similar
get_recent_updates
find_reference_centers
get_research_log
get_schema
find_similar_diseases
get_sus_coverage
Tools removed
Tools this server used to expose. Anything built against them stopped working on the day they went.
find_communities
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://raras.org/api/mcp | streamable-http | answering | 1321 ms | 10 min ago |
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Raras — questions
Answers built from our own checks of this server.