Search and read a patient chart over the Canvas FHIR R4 API. Read-only. Hosted by usefulapi — connect from Claude, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"canvas-medical": {
"url": "https://canvas-medical.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"canvas-medical": {
"type": "http",
"url": "https://canvas-medical.usefulapi.io/mcp"
}
}
}Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
Patient data: Do not use this server with protected health information (PHI). We do not sign HIPAA Business Associate Agreements (BAAs). See Terms, Health data.
The login page asks for your Canvas client secret, Canvas client id and Canvas instance (subdomain).
Create an application with the client-credentials grant type in Canvas → Settings → API. The instance is your Canvas subdomain.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Canvas client secret, Canvas client id and Canvas instance (subdomain). If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Turn on the Canvas Medical connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
canvas_search | read | Search a FHIR resource Search any supported FHIR R4 resource in the chart. Pick `resource`, then narrow with the standard FHIR search parameters. Nearly every clinical question starts here: Condition or Observation for a problem list and results, MedicationRequest for prescriptions, Appointment or Encounter for visits, DocumentReference for notes. Canvas: GET /{resource}. |
canvas_read | read | Read one FHIR resource Fetch a single FHIR resource by type and id. Canvas: GET /{resource}/{id}. |
canvas_get_patient_everything | read | Get everything for one patient Fetch a patient's full record in one FHIR bundle — conditions, medications, observations, encounters and more. The fastest way to answer a broad question about one person, but it can return a large document, so prefer canvas_search when you know which resource you need. Canvas: GET /Patient/{id}/$everything. |
canvas_get_capability_statement | read | Get the FHIR capability statement Fetch the server's FHIR CapabilityStatement — exactly which resources, interactions and search parameters this Canvas instance supports. Read it when a search is rejected and you want to know what the instance actually accepts. Canvas: GET /metadata. |
canvas_medical_usage_status | Usage status (free-tier meter) Report the caller's current free-tier usage this month: calls used, monthly limit, remaining, and whether the cap is reached. Read-only; does not count against the meter. | |
canvas_medical_request_feature | Request a missing feature Tell usefulapi that the user needs something the Canvas Medical tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
canvas_medical_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED Canvas Medical tool calls (the free tier caps monthly usage). Choose monthly ($9/month) or yearly ($90/year — 2 months free) billing. Returns a Stripe Checkout link to open in your browser; after payment your account upgrades automatically. Does not count against the meter. | |
canvas_medical_cancel_subscription | Cancel the Pro subscription Cancel the caller's Canvas Medical Pro subscription at the end of the paid period (no refund for the current period; unlimited calls continue until then, then the free tier applies). Requires confirm: true. Run canvas_medical_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 100 tool calls / month |
| Pro | $9/mo · $90/yr | Unlimited |
Pro covers this Canvas Medical server only. Subscribe with canvas_medical_upgrade (it returns a Stripe Checkout link). Cancel any time with canvas_medical_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running canvas_medical_upgrade before then undoes the cancel. Or write to [email protected].
No. usefulapi is an independent service. It is not affiliated with or endorsed by Canvas Medical. The server calls the Canvas Medical API with your own Canvas Medical access, so it sees only the data that your account can see.
No. Do not use this server with protected health information (PHI). We do not sign HIPAA Business Associate Agreements (BAAs). See Terms, Health data.
The login page asks for your Canvas client secret, Canvas client id and Canvas instance (subdomain). See Before you connect for where to find them.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Canvas client secret, Canvas client id and Canvas instance (subdomain). If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Canvas Medical API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Canvas Medical.
All 4 Canvas Medical tools are marked read-only.
The Free plan gives 100 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls, for this Canvas Medical server only. Run canvas_medical_usage_status to see how many calls you used.
Ask the AI to run canvas_medical_upgrade: it returns a Stripe Checkout link. To cancel, run canvas_medical_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with canvas_medical_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.