Answers trial questions from the ClinicalTrials.gov registry itself.

Patient recruitment, competitor pipeline reviews and study design all draw on the same registry, and it covers each with trial search by status and phase, eligibility matching for a patient profile, and full records by NCT ID.

What it is

A connector Anthropic built and runs at hcls.mcp.claude.com, which reads from ClinicalTrials.gov, the NIH/NLM registry of clinical studies. It needs no sign-in and no key.

What you get

Trials found by condition, treatment, sponsor or location, filtered by status and phase
One trial's full record by its NCT ID: eligibility rules, endpoints, sites with contacts, sponsor and enrollment
A company's or institution's trial pipeline, such as every Pfizer Phase 3 trial
Investigators and research sites working in a disease area
The primary and secondary outcome measures of one trial, or the most common ones across a disease area
Trials a given patient might qualify for, matched on age, sex and eligibility terms such as BRCA or HbA1c

Requirements

An MCP client that can reach a remote address. In Claude you add it under Settings > Connectors. Patient-matching searches look only at recruiting trials unless you ask for completed or upcoming ones too.

Setup effort

Paste a URL — add the endpoint to your client