API access and configuration
Authentication disabled
This tool is internal-only. Authentication is currently disabled — all routes are fully accessible. API access controls and user accounts will be added in a future update.
When auth is enabled, each user will receive a unique API key from this page.
API Base URL
https://55-hundred.appAvailable Endpoints
/api/searchSearch 2.9M Form 5500 filings/api/companyLook up a company by EIN/api/providersBrowse top service providers/api/statsPublic database stats (no auth required)Chrome Extension
Surface 401k data directly in Nooks and LinkedIn via the 55 Hundred Chrome extension.