OpenCancer

by opencancer.ai · https://opencancer.ai/api/mcp

Cancer patient expert: NCCN-grounded answers with sources, recruiting trials, and expert review.

5 tools✓ no account neededPricing: not listed

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89 /100

PASS · WITH NOTES

11 of 11 checks · 25 Oct 2026

What it can do

5 tools, in the server's own words.

ask_opencancerread-only

Answers a cancer patient or caregiver question in plain language, grounded in NCCN Guidelines for Patients and medical literature.

find_clinical_trialsread-only

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 …

get_trial_detailsread-only

Returns one clinical trial from ClinicalTrials.gov by its NCT number: what it tests, phase, status, last registry update, ages, the inclusion and exclusion cri…

open_caseread-only

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 st…

send_feedback

Flags an OpenCancer answer for human expert review, or sends feedback to the OpenCancer team.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Every tool is described
1 warning
- !open_case: Inputs with no description: preferred_destinations
note
✓
ConnectsConnected in 546 ms
pass
✓
Lists its toolsFound 5 tools
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No hidden instructionsNo hidden instructions found in tool descriptions
pass
✓
Tools work with good inputs
All good
- ✓ask_opencancer: Answered with an error, probably because of our sample input: Could not get a vetted answer right now. Please try again, or ask at https://opencancer.ai/ask
- ✓find_clinical_trials: Worked (147 ms)
- ✓get_trial_details: Answered with an error, probably because of our sample input: Expected a ClinicalTrials.gov ID like NCT05902169. Check the number, or search with find_clinical_trials.
- –open_case: Not run: labeled read-only, but its name starts with "open", which usually means it changes something. Skipped to be safe: if it only reads, a clearer name helps AI apps too, or test again with --owner
- –send_feedback: Not run: labeled as changing data
pass
✓
Bad inputs give a clean error
All good
- ✓ask_opencancer: Refused missing required input "question" with a clear error
- ✓ask_opencancer: Refused wrong type for "question" with a clear error
- ✓find_clinical_trials: Refused missing required input "condition" with a clear error
- ✓find_clinical_trials: Refused wrong type for "condition" with a clear error
- ✓get_trial_details: Refused missing required input "nct_id" with a clear error
- ✓get_trial_details: Refused wrong type for "nct_id" with a clear error
pass
✓
Tools work togetherfind_clinical_trials → get_trial_details: get_trial_details found what find_clinical_trials returned (nct_id = "NCT07810439")
pass
✓
Fast enough
All good
- ✓Connecting took 546 ms
- ✓Listing tools took 93 ms
- ✓Average tool answer: 522 ms
- ✓ask_opencancer: Slowest tool: ask_opencancer (1.3 s)
pass
✓
No secrets leakedChecked 9 error messages: no secrets or internal details
pass

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://opencancer.ai/api/mcp

Score over time

15 Oct 202685
17 Oct 2026not scored
18 Oct 2026not scored
25 Oct 202689

Reviews

Coming soon: reviews from people who use OpenCancer, signed in with GitHub, one per person. Reviews never change the score.

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