Read ClassMarker groups, links, exams and recent results; manage question bank and access codes. 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": {
"classmarker": {
"url": "https://classmarker.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"classmarker": {
"type": "http",
"url": "https://classmarker.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.
The login page asks for your ClassMarker API key and ClassMarker API secret.
Create a key in ClassMarker under My Account → Webhooks / API Keys (see the API docs); give it access to the groups and links you want to use. API access needs an upgraded ClassMarker account. ClassMarker allows 30 requests per hour per key, so connecting uses one of them. Results contain test-taker names and emails; your key and secret are used only to call the ClassMarker API on your behalf and are never shown to anyone.
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 ClassMarker API key and ClassMarker API secret. 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.
| Tool | Type | What it does |
|---|---|---|
classmarker_list_groups_links_exams | read | List groups, links and exams List the groups, links and exams (tests) this API key can access, with the ids the other tools need (group_id, link_id, link_url_id, test_id, and access_list_id for links with an access-code list). Good first call. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1.json. |
classmarker_recent_group_results | read | Recent results across all groups Recent finished test results taken in the key's groups (all groups, all exams), oldest first, PAGED by finish time: test-taker name, email, score, percentage, pass/fail, timing, certificate. Contains personal data: use small pages. Max look-back 3 months. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/groups/recent_results.json. |
classmarker_recent_link_results | read | Recent results across all links Recent finished test results taken through the key's links (all links, all exams), oldest first, PAGED by finish time: test-taker name, email, score, pass/fail, timing, access code, extra tracking fields, IP address, certificate. Contains personal data: use small pages. Max look-back 3 months. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/links/recent_results.json. |
classmarker_recent_group_exam_results | read | Recent results for one group exam Recent finished results for ONE exam in ONE group (ids from classmarker_list_groups_links_exams), oldest first, PAGED by finish time. Contains personal data: use small pages. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/groups/{group_id}/tests/{test_id}/recent_results.json. |
classmarker_recent_link_exam_results | read | Recent results for one link exam Recent finished results for the exam of ONE link (ids from classmarker_list_groups_links_exams), oldest first, PAGED by finish time. Contains personal data: use small pages. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/links/{link_id}/tests/{test_id}/recent_results.json. |
classmarker_list_categories | read | List question categories List the question-bank categories with their parent categories and ids (needed for creating and updating questions). Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/categories.json. |
classmarker_list_questions | read | List question-bank questions List the questions of the question bank, 200 per page (page 1, 2, ...): question text, type, category, points, options, correct options, status. A full page means more may follow, so ask for the next page. Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/questions.json?page=N. |
classmarker_get_question | read | Get a question Get one question-bank question by id (ids from classmarker_list_questions). Counts as one of ClassMarker's 30 requests per hour per API key. API: GET /v1/questions/{question_id}.json. |
classmarker_add_access_codes | write | Add access codes to a list WRITE: add access codes (1-100 per call, up to 255 characters each; a list holds at most 20,000) to a link's access-code list, so those people can start the exam. The access_list_id comes from classmarker_list_groups_links_exams (links[].access_list_id). Only adds; removing codes is not offered. Does not count against the 30 requests per hour limit. API: POST /v1/accesslists/{access_list_id}.json. |
classmarker_create_parent_category | write | Create a parent category WRITE: create a new top-level question category. Returns its parent_category_id. Counts as one of ClassMarker's 30 requests per hour per API key. API: POST /v1/categories/parent_category.json. |
classmarker_update_parent_category | write | Rename a parent category WRITE: rename an existing parent category (overwrites its name). Counts as one of ClassMarker's 30 requests per hour per API key. API: PUT /v1/categories/parent_category/{parent_category_id}.json. |
classmarker_create_category | write | Create a category WRITE: create a question category under a parent category. Returns its category_id. Counts as one of ClassMarker's 30 requests per hour per API key. API: POST /v1/categories/category.json. |
classmarker_update_category | write | Update a category WRITE: rename a category and/or move it to another parent (overwrites both fields: send the name and parent_category_id you want it to have). Counts as one of ClassMarker's 30 requests per hour per API key. API: PUT /v1/categories/category/{category_id}.json. |
classmarker_create_question | write | Create a question WRITE: add a new question to the question bank. Only multiplechoice, multipleresponse, truefalse and essay can be created. Returns the new question_id. For truefalse, give only correct_options ["A"] (True) or ["B"] (False). Counts as one of ClassMarker's 30 requests per hour per API key. API: POST /v1/questions.json. |
classmarker_update_question | write | Update a question WRITE (overwrites): replace an existing question-bank question. Send the COMPLETE question (type, text, options, correct options, points, feedback), not only the changed fields; read it first with classmarker_get_question. Only multiplechoice, multipleresponse, truefalse and essay questions can be updated. Counts as one of ClassMarker's 30 requests per hour per API key. API: PUT /v1/questions/{question_id}.json. |
classmarker_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. | |
classmarker_request_feature | Request a missing feature Tell usefulapi that the user needs something the ClassMarker 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. | |
classmarker_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED ClassMarker 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. | |
classmarker_cancel_subscription | Cancel the Pro subscription Cancel the caller's ClassMarker 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 classmarker_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 |
| Proper user | $9/mo · $90/yr | Unlimited |
Pro covers this ClassMarker server only. Subscribe with classmarker_upgrade (it returns a Stripe Checkout link). Cancel any time with classmarker_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running classmarker_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 ClassMarker. The server calls the ClassMarker API with your own ClassMarker access, so it sees only the data that your account can see.
The login page asks for your ClassMarker API key and ClassMarker API secret. 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 ClassMarker API key and ClassMarker API secret. 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 ClassMarker 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 ClassMarker.
Yes, if you approve it. 7 of the 15 ClassMarker tools can create or change data. The other 8 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 100 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls, for this ClassMarker server only. Run classmarker_usage_status to see how many calls you used.
Ask the AI to run classmarker_upgrade: it returns a Stripe Checkout link. To cancel, run classmarker_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 classmarker_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.