# OpenCancer Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## OpenCancer

Cancer patient expert with NCCN-grounded answers, clinical trial finder, and expert case review.

- Record: https://musedirectory.ai/connector/opencancer
- Category: Health
- Developer: OpenCancer (https://opencancer.ai/connectors)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 224ms, checked 2026-10-29T11:16:01Z
- Endpoint: https://opencancer.ai/api/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-29T07:31:28Z)
- Source: Found in the official MCP Registry (ai.opencancer/opencancer) https://registry.modelcontextprotocol.io/v0/servers?search=ai.opencancer%2Fopencancer

Answers cancer patient and caregiver questions grounded in NCCN Guidelines and medical literature, finds recruiting clinical trials from ClinicalTrials.gov, explains trial eligibility criteria, and connects users to expert case review by OpenCancer and Cancer Commons scientists.

Example request: "What does stage 3 colon cancer mean and what treatment options does my doctor have?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use OpenCancer to help me. It is a free service with an MCP server at https://opencancer.ai/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- ask_opencancer: Answers a cancer patient or caregiver question in plain language, grounded in NCCN Guidelines for Patients and medical literature. Covers what a diagnosis, stage, biomarker or test result means; treatment options; side effects and their management; questions for the oncologist; s
- find_clinical_trials: Lists clinical trials recruiting now for a cancer type, from ClinicalTrials.gov, optionally near a city, state or country and filtered by a biomarker, drug or treatment keyword and by phase. Returns up to 8 trials with NCT number, phase, sponsor, the sites closest to the requeste
- get_trial_details: Returns one clinical trial from ClinicalTrials.gov by its NCT number: what it tests, phase, status, last registry update, ages, the inclusion and exclusion criteria in their original wording, recruiting sites with their status, study contacts, and the registry link. Eligibility i
- open_case: Returns a link where a patient can start an expert review of their case by OpenCancer and Cancer Commons scientists (records, options, trial shortlist, next step). The link only opens an intake page: no case is created and no records are sent. The patient enters their own details
- send_feedback: Flags an OpenCancer answer for human expert review, or sends feedback to the OpenCancer team. Used when the user says an OpenCancer answer was wrong, unsafe, or incomplete, or wants to tell OpenCancer something (answer_id identifies the answer; message holds the user's words). Al

Screening checks:
- MCP handshake: pass (Answered in 298ms)
- Domain against threat feeds (Cloudflare security DNS): pass (opencancer.ai not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (5 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)