Official MCP RegistryListed
OpenCancer
Cancer patient expert: NCCN-grounded answers with sources, recruiting trials, and expert review.
First seen 15 Oct 2026. Evidence as of 25 Oct 2026.
5
Tools
From an anonymous probe
1
Source listings
Each with its own history
8
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| 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; second opinions; living with cancer. Answers in the language of the question. Returns the answer, its sources, a disclaimer, a link to OpenCancer's care team, and an answer id. Emergencies, prognosis or life-expectancy questions, and questions about children return a safety message that routes to the care team instead of an answer. Educational information, not medical advice. Accepts no personal identifiers | Read-only |
| 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 requested place, a registry link, a link to the full search, and a link to an OpenCancer expert who can build a trial shortlist for a specific case. Listing a trial is not an eligibility decision; only the trial team can confirm eligibility | Read-only |
| 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 is confirmed only by the study team | Read-only |
| 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 and personally confirms consent on that page. Accepts no names, contact details or records. | Read-only |
| 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). Also used to report that an OpenCancer tool returned no usable answer (kind "missing_answer" with answer_id or tool, no message). Feedback is read by the OpenCancer team; it is not an urgent-care channel and no reply is sent through it. | Changes data |
Change history
- send_feedback: input schema changed
- open_case: description changed (+"Returns" +"where a patient can" +"The link only opens")
- get_trial_details: description changed (+"Returns" +"phase, status, last registry update, ages, the inclusion" +"criteria in their")
- find_clinical_trials: input schema changed
- find_clinical_trials: description changed (+"Lists" +"from ClinicalTrials.gov, optionally" +"city, state")
- ask_opencancer: description changed (+"Answers" +"literature. Covers" +"biomarker")
- server instructions changed (+"only; educational information," +"Every answer includes" +"any")
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | ai.opencancer/opencancer | 15 Oct 2026 | 25 Oct 2026 | 1 |