IAM Service -- gRPC API Reference

The IAM service is the source of truth for tenants, users, memberships, roles, permissions, invitations, and realms. It exposes 8 gRPC services with 39 RPCs total. All proto definitions live in proto/iam/v1/.

IAM does not handle authentication or issue tokens. It defines identity and access boundaries only.

---

Cross-Cutting Concerns

Authentication

All RPCs (except those in skip_methods config) require one of:

Method	Header	Format
API Key (bootstrap)	Configurable (e.g. x-api-key)	Raw key string (from env var IAM_AUTH_APIKEYS)
API Key (database)	Configurable (e.g. x-api-key)	Raw key string (created via CreateAPIKey)
JWT Bearer	authorization	Bearer <token>

Bootstrap API keys (configured via environment variable) have full access to all endpoints, including API key management. Database-backed API keys can access all endpoints except the APIKeyService — those endpoints require a bootstrap key.

Unauthenticated requests return UNAUTHENTICATED.

Pagination

List endpoints accept an optional PaginationRequest and return a PaginationResponse.

Field	Type	Description
page_size	int32	Number of items to return. Default: 50. Max: 100.
page_token	string	Opaque cursor (UUID of last item from previous page). Omit for first page.

Field	Type	Description
next_page_token	string	Token for the next page. Empty when no more results.
total_count	int32	Number of items returned in this page (not a global total).

Error Codes

gRPC Code	Domain Cause	Description	Retry?
NOT_FOUND	Resource does not exist	The requested entity was not found by ID or lookup key.	No
ALREADY_EXISTS	Duplicate resource or unique constraint violation	A resource with the given natural key already exists.	No (use idempotency key or GET)
INVALID_ARGUMENT	Validation failure, bad UUID, bad email, bad page token	The request contains an invalid or missing field.	No (fix the request)
FAILED_PRECONDITION	Invalid state transition or missing FK reference	The operation cannot be performed in the current state (e.g. suspending an already-suspended tenant, or referencing a non-existent foreign key).	No (resolve the precondition)
RESOURCE_EXHAUSTED	Rate limit exceeded	The server-wide rate limiter rejected the request.	Yes (backoff and retry)
UNAUTHENTICATED	Missing or invalid credentials	No valid API key or JWT was provided.	No (fix credentials)
INTERNAL	Unexpected server error	An unhandled error occurred.	Yes (with backoff)

Idempotency

Write endpoints accept an idempotency_key field (client-generated string). Keys are:

• Scoped per operation (e.g. create_user, create_invitation) -- the same key string can be used across different scopes without collision.
• Expire after 24 hours.
• Not business data -- use UUIDs or similar opaque values.

Fully enforced (checks before creation, returns cached resource on replay):

• CreateUser
• CreateInvitation

Accepted but not enforced at application level (relies on DB constraints for natural idempotency):

• All other write endpoints that include idempotency_key in their proto definition.

When a completed idempotency key is replayed, the original resource is returned without side effects.

Status Enums

TenantStatus

Value	Proto Name	Meaning
0	TENANT_STATUS_UNSPECIFIED	Default / unknown
1	TENANT_STATUS_ACTIVE	Normal operating state
2	TENANT_STATUS_SUSPENDED	Temporarily disabled
3	TENANT_STATUS_DELETED	Permanently removed

UserStatus

Value	Proto Name	Meaning
0	USER_STATUS_UNSPECIFIED	Default / unknown
1	USER_STATUS_ACTIVE	Normal operating state
2	USER_STATUS_SUSPENDED	Temporarily disabled
3	USER_STATUS_DELETED	Permanently removed

MembershipStatus

Value	Proto Name	Meaning
0	MEMBERSHIP_STATUS_UNSPECIFIED	Default / unknown
1	MEMBERSHIP_STATUS_ACTIVE	User is an active member of the tenant
2	MEMBERSHIP_STATUS_SUSPENDED	Membership temporarily disabled
3	MEMBERSHIP_STATUS_LEFT	User has left the tenant

InvitationStatus

Value	Proto Name	Meaning
0	INVITATION_STATUS_UNSPECIFIED	Default / unknown
1	INVITATION_STATUS_PENDING	Awaiting acceptance
2	INVITATION_STATUS_ACCEPTED	User accepted the invitation
3	INVITATION_STATUS_REVOKED	Invitation was revoked by an admin
4	INVITATION_STATUS_EXPIRED	Invitation passed its expiry time

APIKeyStatus

Value	Proto Name	Meaning
0	API_KEY_STATUS_UNSPECIFIED	Default / unknown
1	API_KEY_STATUS_ACTIVE	Key is valid for authentication
2	API_KEY_STATUS_REVOKED	Key has been revoked and can no longer authenticate

---

1. HealthService

Checks liveness of the service and its dependencies (Postgres, RabbitMQ).

Check

Returns the serving status.

Field	Type	Required	Description
(none)			Empty request

Returns: CheckResponse with status (SERVING_STATUS_SERVING or SERVING_STATUS_NOT_SERVING).

Errors: None (always returns a response).

Idempotency: N/A (read-only).

grpcurl -plaintext localhost:50051 iam.v1.HealthService/Check

---

2. RealmService

Realms are top-level isolation boundaries that group tenants. 3 RPCs.

CreateRealm

Creates a new realm.

Field	Type	Required	Description
key	string	Yes	Unique identifier key for the realm
name	string	Yes	Human-readable name
idempotency_key	string	No	Client-generated idempotency key

Returns: Realm (id, key, name, created_at).

Errors: INVALID_ARGUMENT (empty key or name), ALREADY_EXISTS (duplicate key).

Idempotency: DB constraint on key. The idempotency_key is accepted but not enforced at the application level.

grpcurl -plaintext -d '{
  "key": "acme",
  "name": "Acme Corp",
  "idempotency_key": "req-abc-123"
}' localhost:50051 iam.v1.RealmService/CreateRealm

GetRealm

Retrieves a realm by ID.

Field	Type	Required	Description
id	string	Yes	UUID of the realm

Returns: Realm.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "id": "550e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.RealmService/GetRealm

ListRealms

Lists all realms with pagination.

Field	Type	Required	Description
pagination	PaginationRequest	No	See Pagination

Returns: repeated Realm + PaginationResponse.

Errors: INVALID_ARGUMENT (page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "pagination": {"page_size": 20}
}' localhost:50051 iam.v1.RealmService/ListRealms

---

3. TenantService

Tenants are workspace/billing/isolation boundaries within a realm. 5 RPCs.

CreateTenant

Creates a new tenant within a realm.

Field	Type	Required	Description
realm_id	string	Yes	UUID of the parent realm
slug	string	Yes	URL-safe unique identifier within the realm
display_name	string	Yes	Human-readable tenant name
external_ref	string	No	Optional external reference (e.g. billing ID)
idempotency_key	string	No	Client-generated idempotency key

Returns: Tenant (id, realm_id, slug, display_name, status, external_ref, created_at, updated_at).

Errors: INVALID_ARGUMENT (invalid realm_id UUID), ALREADY_EXISTS (duplicate slug), FAILED_PRECONDITION (realm_id does not exist).

Idempotency: DB constraint on (realm_id, slug). The idempotency_key is accepted but not enforced at the application level.

grpcurl -plaintext -d '{
  "realm_id": "550e8400-e29b-41d4-a716-446655440000",
  "slug": "acme-store",
  "display_name": "Acme Store",
  "idempotency_key": "req-tenant-001"
}' localhost:50051 iam.v1.TenantService/CreateTenant

GetTenant

Retrieves a tenant by ID.

Field	Type	Required	Description
id	string	Yes	UUID of the tenant

Returns: Tenant.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "id": "660e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.TenantService/GetTenant

ListTenants

Lists tenants within a realm.

Field	Type	Required	Description
realm_id	string	Yes	UUID of the realm to filter by
pagination	PaginationRequest	No	See Pagination

Returns: repeated Tenant + PaginationResponse.

Errors: INVALID_ARGUMENT (invalid realm_id, page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "realm_id": "550e8400-e29b-41d4-a716-446655440000",
  "pagination": {"page_size": 25}
}' localhost:50051 iam.v1.TenantService/ListTenants

SuspendTenant

Transitions a tenant from ACTIVE to SUSPENDED.

Field	Type	Required	Description
id	string	Yes	UUID of the tenant
idempotency_key	string	No	Client-generated idempotency key

Returns: SuspendTenantResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (tenant not in ACTIVE state).

Idempotency: DB constraint-based. Suspending an already-suspended tenant returns FAILED_PRECONDITION.

grpcurl -plaintext -d '{
  "id": "660e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-suspend-001"
}' localhost:50051 iam.v1.TenantService/SuspendTenant

ReactivateTenant

Transitions a tenant from SUSPENDED to ACTIVE.

Field	Type	Required	Description
id	string	Yes	UUID of the tenant
idempotency_key	string	No	Client-generated idempotency key

Returns: ReactivateTenantResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (tenant not in SUSPENDED state).

Idempotency: DB constraint-based. Reactivating an already-active tenant returns FAILED_PRECONDITION.

grpcurl -plaintext -d '{
  "id": "660e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-reactivate-001"
}' localhost:50051 iam.v1.TenantService/ReactivateTenant

---

4. UserService

Users are global identities (not scoped to a tenant). 5 RPCs.

CreateUser

Creates a new user. At least one identifier (email or phone) should be provided.

Field	Type	Required	Description
email	string	No	Email address (validated for format)
phone_e164	string	No	Phone number in E.164 format
display_name	string	No	Human-readable display name
idempotency_key	string	Yes	Client-generated idempotency key

Returns: User (id, email, phone_e164, display_name, status, created_at, updated_at).

Errors: INVALID_ARGUMENT (invalid email format), ALREADY_EXISTS (duplicate email/phone).

Idempotency: Fully enforced. Scoped to create_user. Replayed keys return the originally created user without side effects. Keys expire after 24 hours.

grpcurl -plaintext -d '{
  "email": "alice@example.com",
  "display_name": "Alice",
  "idempotency_key": "req-user-001"
}' localhost:50051 iam.v1.UserService/CreateUser

GetUser

Retrieves a user by ID.

Field	Type	Required	Description
id	string	Yes	UUID of the user

Returns: User.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "id": "770e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.UserService/GetUser

GetUserByEmail

Retrieves a user by email address.

Field	Type	Required	Description
email	string	Yes	Email address to look up

Returns: User.

Errors: INVALID_ARGUMENT (empty or invalid email format), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "email": "alice@example.com"
}' localhost:50051 iam.v1.UserService/GetUserByEmail

SuspendUser

Transitions a user from ACTIVE to SUSPENDED.

Field	Type	Required	Description
id	string	Yes	UUID of the user
idempotency_key	string	No	Client-generated idempotency key

Returns: SuspendUserResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (user not in ACTIVE state).

Idempotency: DB constraint-based. The idempotency_key is passed to the handler but state-transition logic prevents duplicate effects.

grpcurl -plaintext -d '{
  "id": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-suspend-user-001"
}' localhost:50051 iam.v1.UserService/SuspendUser

ReactivateUser

Transitions a user from SUSPENDED to ACTIVE.

Field	Type	Required	Description
id	string	Yes	UUID of the user
idempotency_key	string	No	Client-generated idempotency key

Returns: ReactivateUserResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (user not in SUSPENDED state).

Idempotency: DB constraint-based. The idempotency_key is passed to the handler but state-transition logic prevents duplicate effects.

grpcurl -plaintext -d '{
  "id": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-reactivate-user-001"
}' localhost:50051 iam.v1.UserService/ReactivateUser

---

5. MembershipService

Memberships represent the relationship between a user and a tenant. 6 RPCs.

CreateMembership

Creates a membership linking a user to a tenant.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
user_id	string	Yes	UUID of the user
idempotency_key	string	No	Client-generated idempotency key

Returns: Membership (id, tenant_id, user_id, status, authz_version, created_at, updated_at).

Errors: INVALID_ARGUMENT (invalid UUID), ALREADY_EXISTS (duplicate (tenant_id, user_id)), FAILED_PRECONDITION (tenant or user does not exist).

Idempotency: Natural idempotency via DB unique constraint on (tenant_id, user_id). Duplicate inserts return ALREADY_EXISTS.

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "user_id": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-membership-001"
}' localhost:50051 iam.v1.MembershipService/CreateMembership

GetMembership

Retrieves a membership by ID.

Field	Type	Required	Description
id	string	Yes	UUID of the membership

Returns: Membership.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "id": "880e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.MembershipService/GetMembership

ListUserMemberships

Lists all memberships for a given user.

Field	Type	Required	Description
user_id	string	Yes	UUID of the user
pagination	PaginationRequest	No	See Pagination

Returns: repeated Membership + PaginationResponse.

Errors: INVALID_ARGUMENT (invalid UUID, page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "user_id": "770e8400-e29b-41d4-a716-446655440000",
  "pagination": {"page_size": 10}
}' localhost:50051 iam.v1.MembershipService/ListUserMemberships

ListTenantMembers

Lists all memberships for a given tenant.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
pagination	PaginationRequest	No	See Pagination

Returns: repeated Membership + PaginationResponse.

Errors: INVALID_ARGUMENT (invalid UUID, page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "pagination": {"page_size": 10}
}' localhost:50051 iam.v1.MembershipService/ListTenantMembers

SuspendMembership

Transitions a membership from ACTIVE to SUSPENDED.

Field	Type	Required	Description
id	string	Yes	UUID of the membership
idempotency_key	string	No	Client-generated idempotency key

Returns: SuspendMembershipResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (membership not in ACTIVE state).

Idempotency: DB constraint-based. State-transition logic prevents duplicate effects.

grpcurl -plaintext -d '{
  "id": "880e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-suspend-mem-001"
}' localhost:50051 iam.v1.MembershipService/SuspendMembership

ReactivateMembership

Transitions a membership from SUSPENDED to ACTIVE.

Field	Type	Required	Description
id	string	Yes	UUID of the membership
idempotency_key	string	No	Client-generated idempotency key

Returns: ReactivateMembershipResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (membership not in SUSPENDED state).

Idempotency: DB constraint-based. State-transition logic prevents duplicate effects.

grpcurl -plaintext -d '{
  "id": "880e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-reactivate-mem-001"
}' localhost:50051 iam.v1.MembershipService/ReactivateMembership

---

6. InvitationService

Invitations allow existing members to invite new users to a tenant. Invitations expire after 7 days. 4 RPCs.

CreateInvitation

Creates a pending invitation for an email address to join a tenant.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
email	string	Yes	Email of the invitee (validated for format)
invited_by	string	No	UUID of the user sending the invitation
idempotency_key	string	Yes	Client-generated idempotency key

Returns: Invitation (id, tenant_id, email, invited_by, status, expires_at, accepted_by, accepted_at, created_at, updated_at).

Errors: INVALID_ARGUMENT (invalid email, invalid tenant_id, invalid invited_by), ALREADY_EXISTS (pending invitation for this email+tenant already exists), FAILED_PRECONDITION (tenant does not exist).

Idempotency: Fully enforced. Scoped to create_invitation. Replayed keys return the originally created invitation without side effects. Keys expire after 24 hours. Note: on replay, the token field is not returned (it is only available on initial creation).

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "email": "bob@example.com",
  "invited_by": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-invite-001"
}' localhost:50051 iam.v1.InvitationService/CreateInvitation

AcceptInvitation

Accepts a pending invitation using the invitation token.

Field	Type	Required	Description
token	string	Yes	The invitation token (received out of band, e.g. via email)
user_id	string	Yes	UUID of the user accepting the invitation
idempotency_key	string	No	Client-generated idempotency key

Returns: AcceptInvitationResponse (empty body on success).

Errors: INVALID_ARGUMENT (empty token, invalid user_id), NOT_FOUND (token does not match any pending invitation), FAILED_PRECONDITION (invitation not in PENDING state or expired).

Idempotency: DB constraint-based. Accepting an already-accepted invitation returns FAILED_PRECONDITION.

grpcurl -plaintext -d '{
  "token": "a1b2c3d4e5f6...",
  "user_id": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-accept-001"
}' localhost:50051 iam.v1.InvitationService/AcceptInvitation

RevokeInvitation

Revokes a pending invitation.

Field	Type	Required	Description
id	string	Yes	UUID of the invitation
idempotency_key	string	No	Client-generated idempotency key

Returns: RevokeInvitationResponse (empty body on success).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, FAILED_PRECONDITION (invitation not in PENDING state).

Idempotency: DB constraint-based. Revoking an already-revoked invitation returns FAILED_PRECONDITION.

grpcurl -plaintext -d '{
  "id": "990e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-revoke-001"
}' localhost:50051 iam.v1.InvitationService/RevokeInvitation

ListTenantInvitations

Lists invitations for a tenant, optionally filtered by status.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
status_filter	InvitationStatus	No	Filter by status (e.g. INVITATION_STATUS_PENDING)
pagination	PaginationRequest	No	See Pagination

Returns: repeated Invitation + PaginationResponse.

Errors: INVALID_ARGUMENT (invalid tenant_id, page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "status_filter": "INVITATION_STATUS_PENDING",
  "pagination": {"page_size": 20}
}' localhost:50051 iam.v1.InvitationService/ListTenantInvitations

---

7. RoleService

Manages roles, permissions, role-permission associations, and role assignments to memberships. 10 RPCs.

CreateRole

Creates a new role within a tenant.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
key	string	Yes	Unique key within the tenant (e.g. admin, cashier)
name	string	Yes	Human-readable role name
description	string	No	Optional description
is_system	bool	No	Whether this is a system-managed role (default: false)
idempotency_key	string	No	Client-generated idempotency key

Returns: Role (id, tenant_id, key, name, description, is_system, created_at, updated_at).

Errors: INVALID_ARGUMENT (invalid tenant_id), ALREADY_EXISTS (duplicate (tenant_id, key)), FAILED_PRECONDITION (tenant does not exist).

Idempotency: DB constraint on (tenant_id, key). The idempotency_key is accepted but not enforced at the application level.

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "key": "admin",
  "name": "Administrator",
  "is_system": true,
  "idempotency_key": "req-role-001"
}' localhost:50051 iam.v1.RoleService/CreateRole

GetRole

Retrieves a role by ID, including its attached permissions.

Field	Type	Required	Description
id	string	Yes	UUID of the role

Returns: Role + repeated Permission.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND.

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "id": "aa0e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.RoleService/GetRole

ListRoles

Lists roles within a tenant.

Field	Type	Required	Description
tenant_id	string	Yes	UUID of the tenant
pagination	PaginationRequest	No	See Pagination

Returns: repeated Role + PaginationResponse.

Errors: INVALID_ARGUMENT (invalid tenant_id, page_size > 100, invalid page_token).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "tenant_id": "660e8400-e29b-41d4-a716-446655440000",
  "pagination": {"page_size": 50}
}' localhost:50051 iam.v1.RoleService/ListRoles

CreatePermission

Creates a global permission (not scoped to a tenant).

Field	Type	Required	Description
key	string	Yes	Unique permission key (e.g. orders.create, reports.view)
description	string	No	Optional description
idempotency_key	string	No	Client-generated idempotency key

Returns: Permission (id, key, description, created_at).

Errors: ALREADY_EXISTS (duplicate key).

Idempotency: DB constraint on key. The idempotency_key is accepted but not enforced at the application level.

grpcurl -plaintext -d '{
  "key": "orders.create",
  "description": "Can create new orders",
  "idempotency_key": "req-perm-001"
}' localhost:50051 iam.v1.RoleService/CreatePermission

AddPermissionToRole

Attaches a permission to a role.

Field	Type	Required	Description
role_id	string	Yes	UUID of the role
permission_id	string	Yes	UUID of the permission
idempotency_key	string	No	Client-generated idempotency key

Returns: Empty response on success.

Errors: INVALID_ARGUMENT (invalid UUID), ALREADY_EXISTS (permission already attached), FAILED_PRECONDITION (role or permission does not exist).

Idempotency: DB constraint on (role_id, permission_id). Duplicate calls return ALREADY_EXISTS.

grpcurl -plaintext -d '{
  "role_id": "aa0e8400-e29b-41d4-a716-446655440000",
  "permission_id": "bb0e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-add-perm-001"
}' localhost:50051 iam.v1.RoleService/AddPermissionToRole

RemovePermissionFromRole

Detaches a permission from a role.

Field	Type	Required	Description
role_id	string	Yes	UUID of the role
permission_id	string	Yes	UUID of the permission

Returns: Empty response on success.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND (association does not exist).

Idempotency: Naturally idempotent -- removing a non-existent association returns NOT_FOUND.

grpcurl -plaintext -d '{
  "role_id": "aa0e8400-e29b-41d4-a716-446655440000",
  "permission_id": "bb0e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.RoleService/RemovePermissionFromRole

AssignRole

Assigns a role to a membership.

Field	Type	Required	Description
membership_id	string	Yes	UUID of the membership
role_id	string	Yes	UUID of the role
assigned_by	string	No	UUID of the user performing the assignment
note	string	No	Optional note explaining the assignment
idempotency_key	string	No	Client-generated idempotency key

Returns: RoleAssignment (id, membership_id, role_id, assigned_by, assigned_at, note).

Errors: INVALID_ARGUMENT (invalid UUID), ALREADY_EXISTS (role already assigned to this membership), FAILED_PRECONDITION (membership or role does not exist).

Idempotency: DB constraint on (membership_id, role_id). Duplicate assignments return ALREADY_EXISTS.

grpcurl -plaintext -d '{
  "membership_id": "880e8400-e29b-41d4-a716-446655440000",
  "role_id": "aa0e8400-e29b-41d4-a716-446655440000",
  "assigned_by": "770e8400-e29b-41d4-a716-446655440000",
  "idempotency_key": "req-assign-001"
}' localhost:50051 iam.v1.RoleService/AssignRole

UnassignRole

Removes a role assignment from a membership.

Field	Type	Required	Description
membership_id	string	Yes	UUID of the membership
role_id	string	Yes	UUID of the role

Returns: Empty response on success.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND (assignment does not exist).

Idempotency: Naturally idempotent -- removing a non-existent assignment returns NOT_FOUND.

grpcurl -plaintext -d '{
  "membership_id": "880e8400-e29b-41d4-a716-446655440000",
  "role_id": "aa0e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.RoleService/UnassignRole

ListMembershipRoles

Lists all roles assigned to a membership.

Field	Type	Required	Description
membership_id	string	Yes	UUID of the membership

Returns: repeated Role.

Errors: INVALID_ARGUMENT (invalid UUID).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "membership_id": "880e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.RoleService/ListMembershipRoles

CheckPermission

Checks whether a membership has a specific permission (via any of its assigned roles).

Field	Type	Required	Description
membership_id	string	Yes	UUID of the membership
permission_key	string	Yes	Permission key to check (e.g. orders.create)

Returns: CheckPermissionResponse with allowed (bool).

Errors: INVALID_ARGUMENT (invalid UUID).

Idempotency: N/A (read-only).

grpcurl -plaintext -d '{
  "membership_id": "880e8400-e29b-41d4-a716-446655440000",
  "permission_key": "orders.create"
}' localhost:50051 iam.v1.RoleService/CheckPermission

---

8. APIKeyService

Manages database-backed API keys for service-to-service authentication. All 4 RPCs require a bootstrap API key (configured via IAM_AUTH_APIKEYS env var). Database-backed API keys cannot call these endpoints. 4 RPCs.

CreateAPIKey

Creates a new API key. The raw key is returned only once in the response — it cannot be retrieved later.

Field	Type	Required	Description
name	string	Yes	Unique human-readable name for the key
description	string	No	Optional description
expires_at	Timestamp	No	Optional expiry time. Keys without expiry never expire.
created_by	string	No	Identifier of who created the key

Returns: APIKey + raw_key (the plaintext key, only available on first creation).

Errors: INVALID_ARGUMENT (empty name), PERMISSION_DENIED (caller is not using a bootstrap key).

Idempotency: DB constraint on name. Duplicate name returns the existing key with an empty raw_key (the plaintext is not recoverable).

grpcurl -plaintext -H "X-API-Key: your-bootstrap-key" -d '{
  "name": "pos-service",
  "description": "API key for the POS service"
}' localhost:50051 iam.v1.APIKeyService/CreateAPIKey

GetAPIKey

Retrieves an API key by ID. Returns metadata only (never the raw key).

Field	Type	Required	Description
id	string	Yes	UUID of the API key

Returns: APIKey.

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, PERMISSION_DENIED (caller is not using a bootstrap key).

Idempotency: N/A (read-only).

grpcurl -plaintext -H "X-API-Key: your-bootstrap-key" -d '{
  "id": "cc0e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.APIKeyService/GetAPIKey

ListAPIKeys

Lists all API keys with pagination.

Field	Type	Required	Description
pagination	PaginationRequest	No	See Pagination

Returns: repeated APIKey + PaginationResponse.

Errors: INVALID_ARGUMENT (page_size > 100, invalid page_token), PERMISSION_DENIED (caller is not using a bootstrap key).

Idempotency: N/A (read-only).

grpcurl -plaintext -H "X-API-Key: your-bootstrap-key" -d '{
  "pagination": {"page_size": 20}
}' localhost:50051 iam.v1.APIKeyService/ListAPIKeys

RevokeAPIKey

Revokes an active API key. Revoked keys can no longer authenticate.

Field	Type	Required	Description
id	string	Yes	UUID of the API key to revoke

Returns: APIKey (with status REVOKED).

Errors: INVALID_ARGUMENT (invalid UUID), NOT_FOUND, PERMISSION_DENIED (caller is not using a bootstrap key).

Idempotency: Revoking an already-revoked key is a no-op (returns the revoked key without error or event).

grpcurl -plaintext -H "X-API-Key: your-bootstrap-key" -d '{
  "id": "cc0e8400-e29b-41d4-a716-446655440000"
}' localhost:50051 iam.v1.APIKeyService/RevokeAPIKey