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POST/repositories/{repo_id}/issues/{issue_id}/assignees

Assign a principal to a work item in a repository

add_issue_assignee
  • issue:update
    A token needs the issue:update scope: Update work items — status, fields, hierarchyGranted by mcp_agent_write, write_api, write_repository.Every operation this scope unlocks
  • Audited · mutation

    x-gitmoap-audit: {"kind":"audited","arg":"mutation"}

Adds a person or service account to the work item's assignees; assigning someone already assigned changes nothing. The assignee must be a member of the repository, and a work item takes at most 5. Developers and above may assign on any work item, its author on their own; an AI agent may assign only agents of its own organization.

Parameters

Path
  • repo_idRepositoryId (string · uuid)Repository ID
  • issue_idIssueId (integer · int64)Work-item iid

Request body

application/json
  • principal_idPrincipalId (string · uuid)
Request body exampleSynthesized example
{
"principal_id": "5279e7b4-f87c-4b96-a0f8-bea3e53e57ce"
}

Responses

200The work item, with the assignee added. Idempotent: a re-assign returns the current stateapplication/json
  • created_atstring
  • created_byActorSummaryWho created the work item, as they were when they created it.
  • iidIssueId (integer · int64)
  • root_scope_idGroupId (string · uuid)The top-level group the item's group or repository belongs to.
  • scope_idstring
  • scope_typeScopeTypegrouprepositoryWhether the item lives in a group or a repository. With scope_id and iid it forms the item's current address — the #412 a person types — which changes when the item moves.
  • status_categoryStatusCategorytriagetodoin_progressin_reviewblockeddonecancelledThe fixed category of the item's current status, which boards, filters and progress rollups work from.
  • status_idStatusId (string)
  • titleIssueTitle (string)
  • uidIssueUid (string · uuid)The work item's permanent identifier. Unlike its number, it never changes, even when the item moves to another group or repository.
  • updated_atstringWhen the work item last changed, ISO 8601. Listings order by it, newest first.
  • work_item_typeWorkItemTypeepicstorybugtaskspikechoreincidentsub_taskThe kind of work item. The type decides where an item may live (a group or a repository), which types it may have as children, and which fields it accepts.
  • ancestor_group_idsarray of GroupId (string · uuid)optionalThe groups the item sits beneath, nearest first.
  • ancestor_issue_uidsarray of IssueUid (string · uuid)optionalThe item's ancestors' permanent identifiers, nearest first, for display. It can briefly lag behind a change of parent higher up the chain.
  • assignee_idsarray of PrincipalId (string · uuid)optionalThe people assigned to the work item. Absent when nobody is.
  • author_can_pushboolean or nulloptionalWhether the author can push to where this work item lives — its repository, or a group work item's group. False for a drive-by contributor's text. Absent where it was not computed.
  • closed_atstring or nulloptional
  • closed_byPrincipalId (string · uuid) or nulloptional
  • descriptionMarkdownDoc (string) or nulloptional
  • labelsarray of LabelKey (string)optionalThe keys of the labels applied to the work item. Absent when it has none.
  • milestone_idMilestoneId (string · uuid) or nulloptional
  • milestone_scope_idstring or nulloptional
  • milestone_scope_typeScopeTypegrouprepositoryor nulloptionalWhether the item's milestone belongs to a group or a repository — not necessarily the item's own, since a group milestone can hold work items from several repositories.
  • parent_refIssueRef or nulloptionalThe parent's current address, for display. Absent when the item has no parent.
  • parent_uidIssueUid (string · uuid) or nulloptionalThe parent work item's permanent identifier, if the item has a parent.
  • pointsinteger · int32 or nulloptional0–∞
  • regressed_atstring or nulloptional
  • regressed_at_shaCommitHash (string) or nulloptionalThe commit whose evidence proved the regression — the first known bad commit, and the upper end of the range of suspect commits.
  • regressed_from_shaCommitHash (string) or nulloptionalThe commit at which the item was last verified, kept when it regresses — the last known good commit.
  • regressed_run_idPipelineRunId (string · uuid) or nulloptional
  • severitySeveritycriticalhighmediumlowor nulloptional
  • type_profileBlueprintRef or nulloptionalThe custom type this item was filed as, pointing at the group or repository where the blueprint is defined. work_item_type still decides where the item may live, its children and its fields; the blueprint adds a display label and facets. Absent for an item filed as a plain built-in type.
  • verificationVerificationStateunverifiedverifiedregressedoptionalWhether CI has proved the work item's acceptance criteria. unverified until a pipeline run proves them, verified once one has, and regressed when a later run shows that evidence no longer holds.
  • verified_atstring or nulloptional
  • verified_at_shaCommitHash (string) or nulloptionalThe commit at which CI proved the acceptance criteria. Absent until a pipeline run has.
  • verified_run_idPipelineRunId (string · uuid) or nulloptional
  • versioninteger · int64optional0–∞The work item's revision, incremented on every change. Send it back with an update; if the item has changed since you read it, the update is refused with a 409.
200 exampleSynthesized example
{
"created_at": "2026-10-10T07:13:41Z",
"created_by": {
"email": "mara@acme.example",
"id": "id-d677",
"username": "lin",
"avatar_url": "https://gitmoap.example/acme/0aef734f"
},
"iid": 18,
"root_scope_id": "4c1d8e2f-6a3b-4f90-b7c5-1e2d3c4b5a69",
"scope_id": "e2d81726-e448-45a3-975a-816f94819f00",
"scope_type": "group",
"status_category": "triage",
"status_id": "5a55ca42-d2ac-4be4-91d2-b884443c8c4f",
"title": "Label every synthesized example",
"uid": "1daf1f34-1ef1-496c-a8d4-296fc6a16a82",
"updated_at": "2026-10-11T22:59:44Z",
"work_item_type": "epic",
"ancestor_group_ids": [
"4c1d8e2f-6a3b-4f90-b7c5-1e2d3c4b5a69",
"4c1d8e2f-6a3b-4f90-b7c5-1e2d3c4b5a69"
],
"ancestor_issue_uids": [
"13b25d7d-b5e7-4822-9797-eb4678811670"
],
"assignee_ids": [
"21610884-e98f-465c-8c89-9d32a231d602"
],
"author_can_push": false,
"closed_at": "2026-10-13T00:54:30Z",
"closed_by": "c9d8e7f6-a5b4-4c3d-9e2f-1a0b9c8d7e6f",
"description": "Renders each region as density contours of its operations.",
"labels": [
"labels-2a4b",
"labels-8175"
],
"milestone_id": "18753438-f390-43d1-8e2d-34a61776a19a",
"milestone_scope_id": "0c8d297e-7978-4334-a556-0f4706c3fb75",
"milestone_scope_type": "group",
"parent_ref": {
"iid": 40,
"scope": {
"group": "4c1d8e2f-6a3b-4f90-b7c5-1e2d3c4b5a69"
}
},
"parent_uid": "bce794a4-81df-491a-beee-a448762f0d42",
"points": 54,
"regressed_at": "2026-10-10T06:23:26Z",
"regressed_at_sha": "b9170a298fa7233a8221cfa6febb113593cb9917",
"regressed_from_sha": "57bba0b4104aba43eb831c908134dfd2bc8a025e",
"regressed_run_id": "9e2b7c41-3d5a-4f8e-b1c2-7a6d5e4f3c2b",
"severity": "critical",
"type_profile": {
"blueprint_id": "622dbad6-2e0f-49a6-bc50-065d0a4e9a9f",
"scope": {
"group": "4c1d8e2f-6a3b-4f90-b7c5-1e2d3c4b5a69"
}
},
"verification": "unverified",
"verified_at": "2026-10-15T10:49:06Z",
"verified_at_sha": "956b0a1d5a795c5157e21096ca276a4904a3193f",
"verified_run_id": "9e2b7c41-3d5a-4f8e-b1c2-7a6d5e4f3c2b",
"version": 15
}
400At the assignee cap, or the type takes no assigneesapplication/json
Error codes
  • BAD_REQUESTThe request is malformed: a parameter or a body field is not a well-formed value of its type
  • errorErrorBody
    • The ErrorBody schema
    • codestringThe coarse category, tied to the status: NOT_FOUND, CONFLICT, INSUFFICIENT_SCOPE. Every error has one; the API reference's error catalogue lists them all.
    • messagestringWhat went wrong, for a person. Written to be read, not parsed: match on reason or code.
    • fieldstring or nulloptionalOn a 400 that refused one field's value, the field, as its JSON path: email, items[0].name. Put the message under that input. Absent on every other error.
    • reasonstring or nulloptionalThe specific code, when the error has one: LAST_ORGANIZATION_OWNER, BRANCH_PROTECTED. The message starts with it too. Match on this when it is present, and on code otherwise.
    • required_scopestring or nulloptionalThe scope the access token was missing, on INSUFFICIENT_SCOPE.
    • violationsanyoptionalPresent on the structured-validation errors (PROVIDER_VALIDATION_FAILED per-node, PIPELINE_VALIDATION_FAILED DAG): a JSON array of the offending elements, so a caller can fix every one in a single round-trip. Absent (omitted) on every other error.
400 exampleSynthesized example
{
"error": {
"code": "code-2ca8",
"message": "Inline scalar newtypes but keep their brand"
}
}
401Unauthenticated — no credential, or an invalid oneapplication/json
Error codes
  • UNAUTHORIZEDNo credential was sent, or the one sent is invalid, expired or revoked
  • errorErrorBody
    • The ErrorBody schema
    • codestringThe coarse category, tied to the status: NOT_FOUND, CONFLICT, INSUFFICIENT_SCOPE. Every error has one; the API reference's error catalogue lists them all.
    • messagestringWhat went wrong, for a person. Written to be read, not parsed: match on reason or code.
    • fieldstring or nulloptionalOn a 400 that refused one field's value, the field, as its JSON path: email, items[0].name. Put the message under that input. Absent on every other error.
    • reasonstring or nulloptionalThe specific code, when the error has one: LAST_ORGANIZATION_OWNER, BRANCH_PROTECTED. The message starts with it too. Match on this when it is present, and on code otherwise.
    • required_scopestring or nulloptionalThe scope the access token was missing, on INSUFFICIENT_SCOPE.
    • violationsanyoptionalPresent on the structured-validation errors (PROVIDER_VALIDATION_FAILED per-node, PIPELINE_VALIDATION_FAILED DAG): a JSON array of the offending elements, so a caller can fix every one in a single round-trip. Absent (omitted) on every other error.
401 exampleSynthesized example
{
"error": {
"code": "code-0a0d",
"message": "Stream pipeline status into the run header"
}
}
403Forbidden — the caller's access level or token scope is insufficientapplication/json
Error codes
  • FORBIDDENYou are signed in but may not do this here; reason names the permission or the rule that refused it
  • INSUFFICIENT_SCOPEThe access token lacks the scope this operation needs; required_scope names it
  • PERMISSION_REQUIREDYou need a permission you do not hold here; the message names it
  • errorErrorBody
    • The ErrorBody schema
    • codestringThe coarse category, tied to the status: NOT_FOUND, CONFLICT, INSUFFICIENT_SCOPE. Every error has one; the API reference's error catalogue lists them all.
    • messagestringWhat went wrong, for a person. Written to be read, not parsed: match on reason or code.
    • fieldstring or nulloptionalOn a 400 that refused one field's value, the field, as its JSON path: email, items[0].name. Put the message under that input. Absent on every other error.
    • reasonstring or nulloptionalThe specific code, when the error has one: LAST_ORGANIZATION_OWNER, BRANCH_PROTECTED. The message starts with it too. Match on this when it is present, and on code otherwise.
    • required_scopestring or nulloptionalThe scope the access token was missing, on INSUFFICIENT_SCOPE.
    • violationsanyoptionalPresent on the structured-validation errors (PROVIDER_VALIDATION_FAILED per-node, PIPELINE_VALIDATION_FAILED DAG): a JSON array of the offending elements, so a caller can fix every one in a single round-trip. Absent (omitted) on every other error.
403 exampleSynthesized example
{
"error": {
"code": "code-2923",
"message": "Label every synthesized example"
}
}
404Not found — or found and private, which is masked as absentapplication/json
Error codes
  • NOT_FOUNDThe resource does not exist — or exists and you cannot see it: a private resource you have no access to answers exactly as an absent one does
  • errorErrorBody
    • The ErrorBody schema
    • codestringThe coarse category, tied to the status: NOT_FOUND, CONFLICT, INSUFFICIENT_SCOPE. Every error has one; the API reference's error catalogue lists them all.
    • messagestringWhat went wrong, for a person. Written to be read, not parsed: match on reason or code.
    • fieldstring or nulloptionalOn a 400 that refused one field's value, the field, as its JSON path: email, items[0].name. Put the message under that input. Absent on every other error.
    • reasonstring or nulloptionalThe specific code, when the error has one: LAST_ORGANIZATION_OWNER, BRANCH_PROTECTED. The message starts with it too. Match on this when it is present, and on code otherwise.
    • required_scopestring or nulloptionalThe scope the access token was missing, on INSUFFICIENT_SCOPE.
    • violationsanyoptionalPresent on the structured-validation errors (PROVIDER_VALIDATION_FAILED per-node, PIPELINE_VALIDATION_FAILED DAG): a JSON array of the offending elements, so a caller can fix every one in a single round-trip. Absent (omitted) on every other error.
404 exampleSynthesized example
{
"error": {
"code": "code-e7b6",
"message": "Draw the region map from operation density"
}
}
409The principal is not a member of the scopeapplication/json
Error codes
  • CONFLICTThe request conflicts with the resource's current state; reason says how
  • LEGAL_ACCEPTANCE_REQUIREDAccept the current Terms of Service before changing anything; reading stays open
  • errorErrorBody
    • The ErrorBody schema
    • codestringThe coarse category, tied to the status: NOT_FOUND, CONFLICT, INSUFFICIENT_SCOPE. Every error has one; the API reference's error catalogue lists them all.
    • messagestringWhat went wrong, for a person. Written to be read, not parsed: match on reason or code.
    • fieldstring or nulloptionalOn a 400 that refused one field's value, the field, as its JSON path: email, items[0].name. Put the message under that input. Absent on every other error.
    • reasonstring or nulloptionalThe specific code, when the error has one: LAST_ORGANIZATION_OWNER, BRANCH_PROTECTED. The message starts with it too. Match on this when it is present, and on code otherwise.
    • required_scopestring or nulloptionalThe scope the access token was missing, on INSUFFICIENT_SCOPE.
    • violationsanyoptionalPresent on the structured-validation errors (PROVIDER_VALIDATION_FAILED per-node, PIPELINE_VALIDATION_FAILED DAG): a JSON array of the offending elements, so a caller can fix every one in a single round-trip. Absent (omitted) on every other error.
409 exampleSynthesized example
{
"error": {
"code": "code-a142",
"message": "Label every synthesized example"
}
}

CLI

gitmoap issues add-assignee

  • --repo-ididRepository ID (id or owner/repo path)
  • --issue-ididWork-item iid
  • --principal-idstring

Used in these guides