List the groups your students are in for a group challenge

GET

/v1/{organizationId}/group-challenge/{challengeId}/group

Bearer token
Permissiongroup-challenge/read
Per organization

Lists the groups of the challenge that at least one of your students is an active member of, oldest first: their state, how far through the steps they are, and your students in them. Deleted groups are not listed.

Only your own students are named. Every other person — the other members, the teacher, the organizers — is shown by role alone, with studentId and name set to null, and a file’s name only when one of your students uploaded it. The members who are not yours are counted in memberCount and not listed.

A page at a time: limit is 20 by default and at most 100.

Parameters

Path parameters

Name	Type	Description
`organizationId`required	stringpattern `^[0-9a-f]{24}$`	The organization’s `_id`: 24 hexadecimal digits, as `listOrganizations` (`GET /v1/organization`) lists it. Example `64b7f0c2a1d3e4f5a6b7c8d9`
`challengeId`required	string	The group challenge’s `_id`, from `listGroupChallenges`.

Query parameters

Name	Type	Description
`page`optional	number	Page number. Defaults to 1. Example `1`
`limit`optional	number	Items per page. Defaults to 20, max 100. Example `20`

Responses

200 OK

Success: message is "Groups fetched successfully.".

Body

successbooleanrequired
Always true on a success.
one oftrue
messagestringrequired
exampleGroups fetched successfully.
paginationobject · PaginationMetarequired
Where one page sits in the whole list.
4 fields of pagination
- pagenumberrequired
  The page returned, counting from 1.
  min1example1
- limitnumberrequired
  Items per page: the limit you sent, 20 if you sent none, and never more than 100.
  min1max100example20
- totalnumberrequired
  Items across every page.
  min0example57
- totalPagesnumberrequired
  Pages at this limit: total / limit, rounded up.
  min0example3
dataarray of GroupChallengeGroupSummaryResponserequired
14 fields of each item
- _idstringrequired
  The group’s id: the groupId of the group operations.
  example6650a1b2c3d4e5f6a7b8c9ed
- challengeIdstringrequired
  The challenge it belongs to.
  example6650a1b2c3d4e5f6a7b8c9eb
- shortCodestringrequired
  A six-character code for the group, unique in the organization.
  example7KQ2MX
- nameobjectnullablerequired
  The name the teacher gave it, or null.
  examplenull
- displayNamestringrequired
  name, or "Group" and the short code when it has none.
  exampleGroup 7KQ2MX
- statusstringrequired
  awaiting_payment and draft while the teacher prepares it; finalized once confirmed, with its steps open one by one; completed once its work has been sent. New values may be added.
  one ofawaiting_paymentdraftfinalizedcompleted
  examplefinalized
- gradeGroupobject · GroupChallengeGradeGroupRefResponserequired
  The grade group its members come from.
  2 fields of gradeGroup
  _idstringrequired
  The grade group’s id within the challenge.
  example6650a1b2c3d4e5f6a7b8c9ec
  labelstringrequired
  Its name.
  exampleGroup 7-8-9
- memberCountnumberrequired
  How many students are in it, yours and others.
  example3
- yourStudentsarray of GroupChallengeMemberResponserequired
  Your students in it. The other members are counted in memberCount and not listed.
  5 fields of each item
  studentIdstringrequired
  The student’s _id, as registerStudent returned it.
  example6650a1b2c3d4e5f6a7b8c9d0
  firstNamestringrequired
  Their first name when they joined the group.
  exampleAda
  lastNamestringrequired
  Their last name then.
  exampleLovelace
  gradeNameobjectnullablerequired
  Their grade’s name then.
  example8
  addedAtstringnullablerequired
  When the teacher added them.
  formatdate-timeexample2026-10-05T13:20:00.000Z
- stepCountnumberrequired
  How many steps the group works through.
  example3
- stepsSubmittednumberrequired
  How many of them are submitted.
  example1
- createdAtstringnullablerequired
  When the teacher created it.
  formatdate-timeexample2026-10-05T13:20:00.000Z
- finalizedAtstringnullablerequired
  When the teacher confirmed it, or null.
  formatdate-timeexample2026-10-12T08:15:00.000Z
- finalSubmittedAtstringnullablerequired
  When its work was sent, or null.
  formatdate-timeexamplenull

Headers

X-RateLimit-Limit integer: Requests your account may make to this operation per window (100).
X-RateLimit-Remaining integer: Requests left in the current window.
X-RateLimit-Reset integer: Seconds until the current window ends.

Example

{
  "success": true,
  "message": "Groups fetched successfully.",
  "pagination": {
    "page": 1,
    "limit": 20,
    "total": 57,
    "totalPages": 3
  },
  "data": [
    {
      "_id": "6650a1b2c3d4e5f6a7b8c9ed",
      "challengeId": "6650a1b2c3d4e5f6a7b8c9eb",
      "shortCode": "7KQ2MX",
      "name": null,
      "displayName": "Group 7KQ2MX",
      "status": "finalized",
      "gradeGroup": {
        "_id": "6650a1b2c3d4e5f6a7b8c9ec",
        "label": "Group 7-8-9"
      },
      "memberCount": 3,
      "yourStudents": [
        {
          "studentId": "6650a1b2c3d4e5f6a7b8c9d0",
          "firstName": "Ada",
          "lastName": "Lovelace",
          "gradeName": "8",
          "addedAt": "2026-10-05T13:20:00.000Z"
        }
      ],
      "stepCount": 3,
      "stepsSubmitted": 1,
      "createdAt": "2026-10-05T13:20:00.000Z",
      "finalizedAt": "2026-10-12T08:15:00.000Z",
      "finalSubmittedAt": null
    }
  ]
}

400 Bad request

bad_request: challengeId is not 24 hexadecimal digits.

When

bad_request
challengeId is not 24 hexadecimal digits.

Example

{
  "error": {
    "code": "bad_request",
    "documentation_url": "https://hub.main-team.org/api/errors#bad_request",
    "message": "Invalid value for 'challengeId': expected ObjectId.",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

401 Unauthorized

unauthorized: The token is missing or malformed, is not signed with your account’s apiSecret, breaks the iat and exp rules, has expired or been revoked, or its account is not active. All of these answer the same.

When

unauthorized
The token is missing or malformed, is not signed with your account’s apiSecret, breaks the iat and exp rules, has expired or been revoked, or its account is not active. All of these answer the same.

Example

{
  "error": {
    "code": "unauthorized",
    "documentation_url": "https://hub.main-team.org/api/errors#unauthorized",
    "message": "Authentication is required or the provided credentials are invalid.",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

403 Forbidden

forbidden: The token is valid, but no role on your account allows group-challenge/read on the organization in the path, or a role denies it.

When

forbidden
The token is valid, but no role on your account allows group-challenge/read on the organization in the path, or a role denies it.

Example

{
  "error": {
    "code": "forbidden",
    "documentation_url": "https://hub.main-team.org/api/errors#forbidden",
    "message": "Insufficient role permissions",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

404 Not found

not_found: organizationId is not the _id of an organization.
not_found: Group challenges are not switched on for this organization. The answer is the one an unknown path gets; nothing was read.
not_found: No group challenge of this organization has this id, or it is not published: a draft, archived or deleted challenge answers the same.

When

not_found
organizationId is not the _id of an organization.
not_found
Group challenges are not switched on for this organization. The answer is the one an unknown path gets; nothing was read.
not_found
No group challenge of this organization has this id, or it is not published: a draft, archived or deleted challenge answers the same.

Example

{
  "error": {
    "code": "not_found",
    "documentation_url": "https://hub.main-team.org/api/errors#not_found",
    "message": "Organization not found!",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

429 Too many requests

too_many_requests: Your account has made more than 100 requests to this operation in the current 60-second window. Wait the seconds in Retry-After before sending again.

When

too_many_requests
Your account has made more than 100 requests to this operation in the current 60-second window. Wait the seconds in Retry-After before sending again.

Headers

Retry-After integer: Seconds to wait before sending again; a request sent sooner is refused too.

Example

{
  "error": {
    "code": "too_many_requests",
    "documentation_url": "https://hub.main-team.org/api/errors#too_many_requests",
    "message": "Too many requests to this operation. Wait the number of seconds in Retry-After, then try again.",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

500 Internal error

internal_error: Something failed on our side. Retry later, and quote request_id if it goes on.

When

internal_error
Something failed on our side. Retry later, and quote request_id if it goes on.

Example

{
  "error": {
    "code": "internal_error",
    "documentation_url": "https://hub.main-team.org/api/errors#internal_error",
    "message": "An unexpected error occurred.",
    "request_id": "0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e"
  }
}

Fields of the error body

errorobject · ErrorDetailrequired
What went wrong.
5 fields of error
- codestringrequired
  A stable machine code: branch on this. Each one is explained at documentation_url.
  one ofinvalid_emailbad_requestunauthorizedforbiddennot_foundconflictpayload_too_largeunsupported_media_typeunprocessable_entitytoo_many_requestsinternal_errorservice_unavailable
  examplenot_found
- messagestringrequired
  Written for a person, and may change: never branch on it.
  exampleNot found!
- documentation_urlstringrequired
  Where this code is explained.
  formaturiexamplehttps://hub.main-team.org/api/errors#not_found
- request_idstringrequired
  This request’s id, also sent as the X-Request-Id response header: the one you sent, when it was acceptable, or else one the API made. Quote it when you report a problem.
  example0b5c6d0e-8f7a-4b1c-9d2e-3f4a5b6c7d8e
- detailsobject
  Present only where an operation says so, and then with the shape that operation documents — the rows it could not accept, say. Treat it as absent everywhere else, and ignore a details you do not recognise.

Example request

# $TOKEN: a short-lived token you minted with your API key and secret
curl -sS 'https://api.main-team.org/v1/<organizationId>/group-challenge/<challengeId>/group?page=1&limit=20' \
  -H "Authorization: Bearer $TOKEN"

const token = process.env.TOKEN; // a short-lived token you minted with your API key and secret

const res = await fetch('https://api.main-team.org/v1/<organizationId>/group-challenge/<challengeId>/group?page=1&limit=20', {
  headers: {
    Authorization: `Bearer ${token}`,
  },
});
const body = await res.json();
if (!res.ok) throw new Error(`${res.status} ${body.error.code}: ${body.error.message}`);
console.log(body.data, body.pagination);

<?php
$token = getenv('TOKEN'); // a short-lived token you minted with your API key and secret

$ch = curl_init('https://api.main-team.org/v1/<organizationId>/group-challenge/<challengeId>/group?page=1&limit=20');
curl_setopt_array($ch, [
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer ' . $token,
    ],
    CURLOPT_RETURNTRANSFER => true,
]);
$response = curl_exec($ch);
if ($response === false) {
    throw new RuntimeException(curl_error($ch));
}
$status = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
$body = json_decode($response, true);
if ($status >= 400) {
    $error = $body['error'];
    throw new RuntimeException("$status {$error['code']}: {$error['message']}");
}
print_r($body['data']);
print_r($body['pagination']);