OpenCancer

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

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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

questionstring, required

The question in plain language, in the user's language, without personal identifiers.

contextstring

Optional general context such as stage or treatments tried, e.g. "stage 3, finished FOLFOX". No identifiers.

cancer_typestring

Optional cancer type, to focus the guidelines used, e.g. "colon cancer".

Tools (5)

ask_opencancer

read-only

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

Input schema (JSON)

{
  "type": "object",
  "required": [
    "question"
  ],
  "properties": {
    "context": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional general context such as stage or treatments tried, e.g. \"stage 3, finished FOLFOX\". No identifiers."
    },
    "question": {
      "type": "string",
      "maxLength": 2000,
      "description": "The question in plain language, in the user's language, without personal identifiers."
    },
    "cancer_type": {
      "type": "string",
      "maxLength": 160,
      "description": "Optional cancer type, to focus the guidelines used, e.g. \"colon cancer\"."
    }
  },
  "additionalProperties": false
}

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

Argument	Type	Description
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).
condition*	string	Cancer type or condition, e.g. "pancreatic cancer".

Input schema (JSON)

{
  "type": "object",
  "required": [
    "condition"
  ],
  "properties": {
    "phase": {
      "enum": [
        "1",
        "2",
        "3",
        "4"
      ],
      "type": "string",
      "description": "Optional trial phase."
    },
    "keyword": {
      "type": "string",
      "maxLength": 120,
      "description": "Optional biomarker, drug, or treatment, e.g. \"KRAS G12C\" or \"CAR-T\"."
    },
    "location": {
      "type": "string",
      "maxLength": 120,
      "description": "Optional city, state, or country, e.g. \"Boston\" or \"Germany\" (city level, not a street address)."
    },
    "condition": {
      "type": "string",
      "maxLength": 160,
      "description": "Cancer type or condition, e.g. \"pancreatic cancer\"."
    }
  },
  "additionalProperties": false
}

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

Argument	Type	Description
nct_id*	string	ClinicalTrials.gov ID, e.g. "NCT05902169".

Input schema (JSON)

{
  "type": "object",
  "required": [
    "nct_id"
  ],
  "properties": {
    "nct_id": {
      "type": "string",
      "pattern": "^NCT[0-9]{8}$",
      "description": "ClinicalTrials.gov ID, e.g. \"NCT05902169\"."
    }
  },
  "additionalProperties": false
}

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

Argument	Type	Description
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

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "question": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional: what the patient wants experts to look at, without personal identifiers."
    },
    "cancer_type": {
      "type": "string",
      "maxLength": 160,
      "description": "Optional cancer type, e.g. \"prostate cancer\"."
    },
    "preferred_destinations": {
      "type": "array",
      "items": {
        "enum": [
          "cancer_commons",
          "vivantx",
          "palitra"
        ],
        "type": "string"
      },
      "uniqueItems": true
    }
  },
  "additionalProperties": false
}

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.

Argument	Type	Description
kind*	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.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "kind"
  ],
  "properties": {
    "kind": {
      "enum": [
        "wrong_or_unsafe",
        "missing_answer",
        "bug",
        "idea",
        "praise"
      ],
      "type": "string",
      "description": "wrong_or_unsafe, missing_answer, bug, idea, or praise."
    },
    "tool": {
      "enum": [
        "ask_opencancer",
        "find_clinical_trials",
        "get_trial_details",
        "open_case"
      ],
      "type": "string",
      "description": "Optional. Which OpenCancer tool this is about."
    },
    "message": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional. The user's feedback in their own words. Contact details are not accepted."
    },
    "answer_id": {
      "type": "string",
      "maxLength": 64,
      "description": "Optional. The answer id from an OpenCancer answer."
    }
  },
  "additionalProperties": false
}