com.pplfree/ground-school

endpoint

https://pplfree.com/mcp

protocol

streamable-http ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is com.pplfree/ground-school live?

Yes — it answered the hub's last check (checked 2h ago). It answered 100% of checks over the last 30 days.

Is com.pplfree/ground-school free to use?

Yes — the hub reached it with no key and no payment.

What tools does com.pplfree/ground-school have?

5 tools: search_faa_knowledge, check_answer, get_lesson, get_practice_question, list_curriculum.

Is com.pplfree/ground-school safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• get_practice_question reads open 6h ago

  Return private-pilot practice questions written for this course in the style of the FAA knowledge test (not actual FAA test questions), each with its answer choices, its topic, a question_id and a link to try it on pplfree.com. The correct answer is withheld by default so the user can attempt the question first. Once the user has answered, call check_answer with that question_id and their choice to grade it (or call this tool again with the question_id and reveal_answer: true to show the answer without grading). Use this when the user wants to be quizzed, asks for practice or test questions, wants to check their understanding of a topic, or is preparing for the FAA private-pilot knowledge test. Optionally scope it to a topic.

  mcp-tool

  12345678910111213141516171819202122232425262728

  {
    "type": "object",
    "required": [],
    "properties": {
      "count": {
        "type": "integer",
        "maximum": 5,
        "minimum": 1,
        "description": "How many questions to return (1-5, default 1)."
      },
      "topic": {
        "type": "string",
        "maxLength": 80,
        "description": "Optional topic to draw from, e.g. \"airspace\", \"weather\", \"aerodynamics\", \"regulations\", \"navigation\", \"weight-balance\", \"systems\". Omit for any topic."
      },
      "question_id": {
        "type": "string",
        "maxLength": 120,
        "description": "A question_id from an earlier call, to return that exact question (typically with reveal_answer: true). Overrides topic and count."
      },
      "reveal_answer": {
        "type": "boolean",
        "default": false,
        "description": "Include the correct choice and the explanation. Default false: leave it off until the user has attempted the question."
      }
    },
    "additionalProperties": false
  }

  arguments 28 lines copy
• list_curriculum reads open 6h ago

  List the ground-school curriculum: modules and the published lessons in each, with their keys. Use this to orient yourself before get_lesson, to answer "what does the course cover", or to help a user plan what to study next.

  mcp-tool

  123456789101112

  {
    "type": "object",
    "required": [],
    "properties": {
      "module": {
        "type": "string",
        "maxLength": 40,
        "description": "Optional module key to expand, e.g. \"MOD-08\". Omit for all modules."
      }
    },
    "additionalProperties": false
  }

  arguments 12 lines copy
• search_faa_knowledge reads unknown 6h ago

  Answer a US private-pilot (FAA) ground-school question from a source-cited curriculum. Use this whenever the user asks about FAA regulations, airspace, VFR weather minimums, weight and balance, aerodynamics, aircraft systems, navigation, weather theory, human factors, or private-pilot certification requirements. Returns short passages, each with the FAA citation it came from (e.g. "14 CFR 91.155", "PHAK Ch. 15") and a link to the lesson. Cite those labels in your answer.

  mcp-tool

  123456789101112131415161718192021

  {
    "type": "object",
    "required": [
      "query"
    ],
    "properties": {
      "limit": {
        "type": "integer",
        "maximum": 8,
        "minimum": 1,
        "description": "How many passages to return (1-8, default 4)."
      },
      "query": {
        "type": "string",
        "maxLength": 500,
        "minLength": 3,
        "description": "The user's question, in their own words."
      }
    },
    "additionalProperties": false
  }

  arguments 21 lines copy
• check_answer reads unknown 21h ago

  Grade the user's answer to a practice question from get_practice_question. Use this when the user replies with their choice (for example "B" or "I think it is C"): pass the question_id and their choice. Returns whether the answer is correct, the correct choice, why each choice is right or wrong, and the FAA citations. It also returns save_progress_url, a pplfree.com link where the user can save the answers from this chat to their study progress on that site, and save_token: pass it back as previous_token on the next check_answer call so one link collects every answer in the chat (up to 20, valid for 7 days). Nothing is stored unless the user opens the link.

  mcp-tool

  12345678910111213141516171819202122232425

  {
    "type": "object",
    "required": [
      "question_id",
      "choice"
    ],
    "properties": {
      "choice": {
        "type": "string",
        "maxLength": 20,
        "description": "The choice the user picked: its label (e.g. \"b\" or \"B\")."
      },
      "question_id": {
        "type": "string",
        "maxLength": 120,
        "description": "The questionId returned by get_practice_question."
      },
      "previous_token": {
        "type": "string",
        "maxLength": 4096,
        "description": "The save_token from the previous check_answer call in this chat, if any, so the save link keeps every answer. Omit on the first answer."
      }
    },
    "additionalProperties": false
  }

  arguments 25 lines copy
• get_lesson reads unknown 21h ago

  Fetch one full ground-school lesson: its summary, why it matters in flight, the learning objectives it covers, and a link to read it. Use this after search_faa_knowledge when the user wants the whole topic rather than a single answer, or when they ask to study or learn a subject properly. Call list_curriculum first if you do not already have a lesson key.

  mcp-tool

  1234567891011121314

  {
    "type": "object",
    "required": [
      "lessonKey"
    ],
    "properties": {
      "lessonKey": {
        "type": "string",
        "maxLength": 120,
        "description": "Lesson key, e.g. \"as.lesson.vfr-minimums\". From list_curriculum."
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.