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Update a cohort

Partial update of cohort fields. When updating dates, the effective range (merged with existing values for omitted fields) must have startDate strictly before endDate at minute precision. Cohort dates are compared at minute precision (matching the dashboard). Returns 422 when both fall in the same minute (startDate and endDate must not be in the same minute) or when startDate is after endDate at minute level (startDate must be before endDate). Returns summary fields — use GET for full detail with members and curriculum structure. Scoped to your integration’s institution via Basic Auth credentials.

PATCH/cohorts/{id}
Authorization
AuthorizationBasic auth · headerrequired

Basic Auth with clientId as username and clientSecret as password

Path parameters
idstringrequired
Request body
requiredapplication/json
namestring
startDatestring<date-time>

Cohort start date. Compared at minute precision (seconds are ignored). Must be strictly before endDate at minute level. If in the same minute as endDate, returns 422 with startDate and endDate must not be in the same minute.

endDatestring<date-time>

Cohort end date. Compared at minute precision (seconds are ignored). Must be strictly after startDate at minute level. If in the same minute as startDate, returns 422 with startDate and endDate must not be in the same minute.

curriculaVersionIdstring
isArchivedboolean
Responses
200

Updated cohort

dataCohortrequired
Show properties
idstringrequired
namestringrequired
institutionIdstringrequired
startDatestring<date-time>required
endDatestring<date-time>required
curriculaVersionIdstringrequired
studyProgramVersionIdstringrequired
isArchivedbooleanrequired
hasDisconnectedFromCurriculaboolean
originalCurriculaVersionIdstring | null
metaResponseMetarequired
Show properties
requestIdstringrequired
timestampstring<date-time>required
versionstringrequired
Allowed:v4
watermarkstring<date-time>

Present on GET /users?updatedSince= pages. Taken at the first page minus a 60s overlap. Bound into pagination.next_cursor. Use it as the next updatedSince after deduping by user id. Delivery is inclusive >= and at-least-once.

400

Bad Request

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
401

Unauthorized

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
404

Not Found

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
422

Unprocessable Entity — validation or business rule error

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
429

Too Many Requests — 1000 requests per minute per institution. Includes X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset (ISO-8601), and Retry-After (seconds).

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
500

Internal Server Error

typestringrequired
Allowed:error
codestringrequired
Allowed:bad_requestunauthorizedforbiddenresource_not_foundconflictvalidation_failedidempotency_key_reusedidempotency_key_in_progressservice_unavailableretryablerate_limit_exceededinternal_error
titlestringrequired
statusintegerrequired
detailstringrequired
instancestring
errorsobject[]
Show properties
Array of object
fieldstring
messagestring
existingUserIdstring

Present on 409 email or membership-code conflicts. The user id that already holds the email or code.

activeSessionobject

Present on time-tracking start 409 when a session is already running. Stop this session, then retry start.

Show properties
idstringrequired
startTimestring<date-time>required
conflictingLogobject

Present on time-tracking 409 when the interval being written overlaps an existing log or open session. Start uses [punch, ∞). Stop uses [sessionStart, stop). endTime is null while that session is still open.

Show properties
idstringrequired
startTimestring<date-time>required
endTimestring<date-time> | nullrequired
Try it
Server
Authorization
Parameters
Bodyapplication/json
Request
curl -X PATCH 'https://fuxam.app/api/v4/cohorts/string' \
  -H 'Authorization: Basic YOUR_CREDENTIALS' \
  -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "name": "Cohort 2025",
  "startDate": "2025-09-01T00:00:00.000Z",
  "endDate": "2028-07-31T23:59:59.000Z",
  "isArchived": false
}'
Response
{
  "data": {
    "id": "coh_001",
    "name": "WS 2024/25",
    "institutionId": "inst_123",
    "startDate": "2024-10-01T00:00:00.000Z",
    "endDate": "2027-09-30T00:00:00.000Z",
    "curriculaVersionId": "cv_001",
    "studyProgramVersionId": "spv_001",
    "isArchived": false,
    "hasDisconnectedFromCurricula": false,
    "originalCurriculaVersionId": null
  },
  "meta": {
    "requestId": "req_abc123",
    "timestamp": "2026-06-26T00:00:00.000Z",
    "version": "v4"
  }
}

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