OpenCancer

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

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

Measured statistics

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "OpenCancer": {
      "url": "https://opencancer.ai/api/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (5)

• ask_opencancer read-only

  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

  Parameters:

  • question (required) — string — The question in plain language, in the user's language, without personal identifiers.
  • context — string — Optional general context such as stage or treatments tried, e.g. "stage 3, finished FOLFOX". No identifiers.
  • cancer_type — string — Optional cancer type, to focus the guidelines used, e.g. "colon cancer".

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• find_clinical_trials read-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 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

  Parameters:

  • condition (required) — string — Cancer type or condition, e.g. "pancreatic cancer".
  • phase — string — Optional trial phase.
  • keyword — string — Optional biomarker, drug, or treatment, e.g. "KRAS G12C" or "CAR-T".
  • location — string — Optional city, state, or country, e.g. "Boston" or "Germany" (city level, not a street address).

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• get_trial_details read-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 criteria in their original wording, recruiting sites with their status, study contacts, and the registry link. Eligibility is confirmed only by the study team

  Parameters:

  • nct_id (required) — string — ClinicalTrials.gov ID, e.g. "NCT05902169".

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• open_case read-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 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.

  Parameters:

  • question — string — Optional: what the patient wants experts to look at, without personal identifiers.
  • cancer_type — string — Optional cancer type, e.g. "prostate cancer".
  • preferred_destinations — array

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• 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.

  Parameters:

  • kind (required) — string — wrong_or_unsafe, missing_answer, bug, idea, or praise.
  • tool — string — Optional. Which OpenCancer tool this is about.
  • message — string — Optional. The user's feedback in their own words. Contact details are not accepted.
  • answer_id — string — Optional. The answer id from an OpenCancer answer.

  Hints: read-only no · destructive no · idempotent yes · open-world no

Publisher website

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.