MCP server

ClassMarker MCP by usefulapi

io.usefulapi/classmarker

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Read ClassMarker groups, links, exams and recent results; manage question bank and access codes.

Website Source

At a glance

Type

MCP server

Publisher

usefulapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

15

Token cost

About 4,421 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http classmarker https://classmarker.usefulapi.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.classmarker]
url = "https://classmarker.usefulapi.io/mcp"

Gemini CLI

{"mcpServers":{"classmarker":{"httpUrl":"https://classmarker.usefulapi.io/mcp"}}}

Cursor

{"mcpServers":{"classmarker":{"url":"https://classmarker.usefulapi.io/mcp"}}}

VS Code

{"servers":{"classmarker":{"type":"http","url":"https://classmarker.usefulapi.io/mcp"}}}

Antigravity

agy mcp add classmarker https://classmarker.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"classmarker","server_url":"https://classmarker.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"classmarker","server_url":"https://classmarker.usefulapi.io/mcp"}

Tools

• classmarker_add_access_codes ~256 tokens
  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. Doe
• classmarker_create_category ~191 tokens
  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_create_parent_category ~148 tokens
  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_create_question ~665 tokens
  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 /
• classmarker_get_question ~138 tokens
  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_list_categories ~107 tokens
  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_groups_links_exams ~134 tokens
  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_list_questions ~163 tokens
  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?p
• classmarker_recent_group_exam_results ~384 tokens
  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_result
• classmarker_recent_group_results ~326 tokens
  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 p
• classmarker_recent_link_exam_results ~382 tokens
  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.j
• classmarker_recent_link_results ~336 tokens
  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. Count
• classmarker_update_category ~257 tokens
  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_update_parent_category ~196 tokens
  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_update_question ~738 tokens
  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 u

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