401K.is Public API
Access 401(k) data programmatically with our free public API. Get contribution limits, provider rankings, and company plan information in JSON format. No authentication required.
Available Endpoints
| Endpoint | Description | Method |
|---|---|---|
/api/limits | Current and historical contribution limits | GET |
/api/providers | Top 15 provider rankings and data | GET |
/api/company/{slug} | Company 401(k) plan data | GET |
/api/search?q={query} | Search companies by name | GET |
Rate Limits
Free tier: 100 requests per hour. No API key required. All responses are JSON with CORS enabled.