lex-service_now
A LegionIO extension connecting Legion to ServiceNow via REST APIs. Covers 66 domains and 345 methods spanning ITSM, ITOM, ITAM, HR, Security, GRC, CSM, DevOps, and platform administration.
Installation
Configuration
{
"service_now": {
"url": "https://your-instance.service-now.com",
"username": "svc_account",
"password": "secret"
}
}OAuth2 and Bearer token are also supported — the most secure credentials provided win (OAuth2 > Bearer > Basic Auth).
Usage
client = Legion::Extensions::ServiceNow::Client.new(
url: 'https://your-instance.service-now.com',
username: 'admin',
password: 'secret'
)
# ITSM
client.list_incidents(sysparm_query: 'state=1^priority=1', sysparm_limit: 10)
client.create_incident(short_description: 'Production down', urgency: '1', impact: '1')
client.resolve_incident(sys_id: 'abc', close_code: 'Solved (Permanently)', close_notes: 'Fixed')
# Change
client.create_normal(short_description: 'Deploy v2.0')
client.get_approvals(id: 'CHG0012345')
# CMDB
client.list_cis(class_name: 'cmdb_ci_server', sysparm_query: 'operational_status=1')
client.get_relationships(class_name: 'cmdb_ci_server', sys_id: 'srv001')
# Generic table escape hatch
client.table_list(table_name: 'u_custom_table', sysparm_query: 'active=true')
client.table_create(table_name: 'u_custom_table', name: 'New Record', u_field: 'value')
# Pagination helper — automatically fetches all pages
all_incidents = client.paginate(:list_incidents, sysparm_query: 'state=1')
# Retry helper — retries on rate limits and server errors
client.with_retry(max_retries: 3) { client.create_incident(short_description: 'Issue') }
# Error handling
begin
client.get_incident(sys_id: 'nonexistent')
rescue Legion::Extensions::ServiceNow::Errors::NotFoundError => e
puts "Not found: #{e.message} (status: #{e.status})"
endSupported Domains (66 total)
ITSM
| Domain |
Methods |
Notes |
| Change |
14 |
normal/emergency/standard + change_tasks/conflicts/approvals |
| Incident |
6 |
CRUD + resolve |
| Problem |
6 |
CRUD + close |
| Request/RITM |
6 |
sc_request + sc_req_item |
| Approval |
5 |
approve/reject + list_for_record |
| Task |
5 |
CRUD + add_work_note |
| SLA |
5 |
definitions + task SLAs |
| CatalogTask |
4 |
sc_task list/get/update/close |
CMDB & Discovery
| Domain |
Methods |
Notes |
| CMDB Instance |
7 |
CI CRUD + relationships |
| CMDB Meta |
2 |
hierarchy + class metadata |
| CiRelationship |
5 |
cmdb_rel_type + cmdb_rel_ci |
| CmdbHealth |
4 |
duplicates, stale CIs, health dashboard |
| Discovery |
5 |
schedules/logs/devices |
| MID Server |
5 |
ecc_agent CRUD + capabilities |
Service Catalog
| Domain |
Methods |
Notes |
| Service Catalog |
11 |
catalogs/items/cart/order |
| Catalog Variable |
5 |
item_option_new CRUD |
Knowledge
| Domain |
Methods |
Notes |
| Knowledge |
5 |
article CRUD |
| Knowledge Base |
6 |
kb_knowledge_base CRUD + categories |
| Knowledge Feedback |
4 |
feedback + views |
User & Organization
| Domain |
Methods |
Notes |
| User |
7 |
CRUD + lookup_by_username/email |
| UserGroup |
9 |
CRUD + member management |
| Account |
4 |
account CRUD |
| Location |
5 |
cmn_location CRUD |
| Department |
5 |
cmn_department CRUD |
| Company |
5 |
core_company CRUD |
| Cost Center |
5 |
cmn_cost_center CRUD |
| Vendor |
5 |
vendor-filtered company records |
Asset & Contract Management
| Domain |
Methods |
Notes |
| Asset |
6 |
alm_asset CRUD + hardware |
| Contract |
5 |
ast_contract CRUD |
| License |
4 |
agreements + allocations + installed software |
Security & Compliance
| Domain |
Methods |
Notes |
| Security Incident |
5 |
sn_si_incident CRUD |
| Access Control |
5 |
sys_security_acl CRUD |
| GRC |
7 |
risks + controls + audits + policies |
HR & Customer Service
| Domain |
Methods |
Notes |
| HR Case |
5 |
sn_hr_core_case CRUD |
| CSM |
6 |
customer cases + contacts |
Project & Release
| Domain |
Methods |
Notes |
| Project |
6 |
pm_project CRUD + tasks |
| Release |
5 |
rm_release CRUD |
Platform Administration
| Domain |
Methods |
Notes |
| System Property |
6 |
sys_properties CRUD |
| Update Set |
6 |
CRUD + list changes |
| Script Include |
5 |
sys_script_include CRUD |
| Business Rule |
5 |
sys_script CRUD |
| Script Action |
5 |
sysevent_script_action CRUD |
| Scheduled Job |
5 |
sysauto_script CRUD |
| UI Policy |
5 |
sys_ui_policy CRUD |
| UI Action |
5 |
sys_ui_action CRUD |
| Workflow |
6 |
wf_workflow + contexts |
| Flow/Subflow |
6 |
sn_fd flows + execution |
| Audit |
3 |
sys_audit + field changes |
| Deprecation Log |
4 |
upgrade history + deprecations |
ITOM & Monitoring
| Domain |
Methods |
Notes |
| Event |
3 |
sysevent CRUD |
| Performance Analytics |
5 |
widgets/scorecards/indicators |
| Metric |
4 |
definitions + instances |
Communications
| Domain |
Methods |
Notes |
| Notification |
5 |
sysevent_email_action CRUD |
| Email Log |
3 |
sys_email list/get/list_for_record |
Field Service
| Domain |
Methods |
Notes |
| Work Order |
6 |
wm_order CRUD + tasks + close |
| On-Call |
5 |
schedules + members + who_is_on_call |
Platform Modules
| Domain |
Methods |
Notes |
| Service Portal |
6 |
portals/pages/widgets |
| Integration Hub |
5 |
spokes/connections/credentials |
Utilities & Reference
| Domain |
Methods |
Notes |
| Table (generic) |
5 |
Any table via /api/now/table/{table} |
| Import Set |
2 |
/api/now/import |
| Aggregate |
1 |
count/sum/avg/min/max on any table |
| Attachment |
5 |
upload/download files |
| Survey |
5 |
assessments + instances + responses |
| Tag |
7 |
label + label_entry CRUD |
| Currency |
3 |
fx_currency + fx_rate |
| Calendar |
6 |
cmn_schedule CRUD + entries |
Helpers
Pagination
all_results = client.paginate(:list_incidents, sysparm_query: 'state=1')
Automatically iterates through all pages.
Retry
client.with_retry(max_retries: 3) { client.create_incident(...) }Retries on RateLimitError (exponential backoff) and ServerError. Raises immediately on auth errors.
Error Handling
rescue Legion::Extensions::ServiceNow::Errors::AuthenticationError => e # 401
rescue Legion::Extensions::ServiceNow::Errors::AuthorizationError => e # 403
rescue Legion::Extensions::ServiceNow::Errors::NotFoundError => e # 404
rescue Legion::Extensions::ServiceNow::Errors::UnprocessableError => e # 422
rescue Legion::Extensions::ServiceNow::Errors::RateLimitError => e # 429
rescue Legion::Extensions::ServiceNow::Errors::ServerError => e # 5xx
rescue Legion::Extensions::ServiceNow::Errors::ServiceNowError => e # all others
LLM Skills (10 total)
Registered automatically when legion-llm is available:
| Skill |
Trigger Words |
servicenow:incident |
incident, INC, outage, p1, sev1 |
servicenow:change_request |
CHG, RFC, change request, CAB |
servicenow:cmdb_query |
CMDB, CI, configuration item |
servicenow:knowledge |
KB, knowledge base, article |
servicenow:service_catalog |
catalog, service request, order |
servicenow:problem_management |
PRB, problem, root cause, RCA |
servicenow:request_fulfillment |
RITM, request item, fulfillment |
servicenow:approval_workflow |
approval, approve, reject |
servicenow:asset_management |
asset, hardware, inventory |
servicenow:security_incident_response |
SIR, security incident, breach |
Development
bundle install
bundle exec rspec # 372 examples, 0 failures
bundle exec rubocop # 0 offenses
License
MIT