The OpenCancer MCP server,
connected in one click.
Cancer patient expert: NCCN-grounded answers with sources, recruiting trials, and expert review. Connect the official OpenCancer MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add OpenCancer to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http opencancer https://opencancer.ai/api/mcpRun in your terminal, then restart Claude Code.
OpenCancer · https://opencancer.ai/api/mcp
What your AI can do with OpenCancer
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “ask_opencancer”: Answers a cancer patient or caregiver question in plain language, grounded in NCCN Guidelines for Patients and medical literature. Covers wh.”
“Use “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.”
“Use “get_trial_details”: Returns one clinical trial from ClinicalTrials.gov by its NCT number: what it tests, phase, status, last registry update, ages, the inclusio.”
“Use “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.”
How secure is the OpenCancer MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how OpenCancer holds up.
Security grade A
gate scanned 5 tools on Oct 18, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by OpenCancer (opencancer.ai) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If OpenCancer adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick OpenCancer
Choose OpenCancer in the gate directory. No sign-in needed.
Use it anywhere
OpenCancer's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools OpenCancer exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
ask_opencancer — Answers a cancer patient or caregiver question in plain language, grounded in NCCN Guidelines for Patients and medical literature. Covers wh
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
get_trial_details — Returns one clinical trial from ClinicalTrials.gov by its NCT number: what it tests, phase, status, last registry update, ages, the inclusio
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
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 w
Who runs the OpenCancer MCP server?
The OpenCancer MCP server at a glance
https://opencancer.ai/api/mcpQuestions, answered
Is there an official OpenCancer MCP server?
Yes — OpenCancer operates its own remote MCP server at opencancer.ai. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect OpenCancer to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick OpenCancer in the directory. No account or sign-in is needed. From then on, OpenCancer's tools are available in every client you've connected to gate.
Do I need to host anything?
No. OpenCancer runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the OpenCancer MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect OpenCancer in minutes. No credit card required.
Connect more than just OpenCancer
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up OpenCancer in: Claude · Claude Code · ChatGPT · Cursor · VS Code