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E&S Premium vs. Admitted-Market Rate Filing Activity (QueryLines)
x402
E&S Premium vs. Admitted-Market Rate Filing Activity (QueryLines) is a paid API for AI agents from api.querylines.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).
Aligns surplus-lines (E&S) premium with YoY growth against SERFF admitted-market rate-filing activity period-by-period by coverage category, with optional lag shifting to test lead/lag relationships.
Price / call$0.5
Success—
StatusUnknown
How this service works
The leading-indicator join: E&S premium (with YoY growth) aligned period-by-period against admitted-market SERFF rate-filing activity (filing_count, avg_rate_change_pct, share_increasing, max_increase) on the shared coverage category. `lag` shifts the rate series back N periods to test the relationship. TX only; category join is annual, line=all also monthly/quarterly. Two aligned data families, not a prediction. $0.50/query. Free: /v1/rates/sample. Docs: https://api.querylines.com/openapi.json
Output
Returns two aligned data series per period: E&S premium figures with YoY growth rates, and admitted-market SERFF rate filing metrics (filing count, average rate change %, share of filings with increasing rates, max increase), joined on the shared coverage category and optionally lag-shifted for lead/lag analysis.
Example use cases
Example prompt
“Pull the E&S premium vs. admitted-market SERFF rate filing comparison for Texas homeowners coverage, yearly granularity from 2018-01 to 2023-12, and shift the rate series back 1 year so I can see if E&S growth leads admitted-market rate increases.”
Technical details
Endpoint
GEThttps://api.querylines.com/v1/rates/vs-premiumWhen to prefer
Use this endpoint when you need to study the relationship between the E&S (surplus lines) insurance market and admitted-market rate-filing behavior — especially to test whether E&S premium growth is a leading indicator for admitted-market hardening. Prefer this over the raw rates or raw E&S endpoints when you specifically need both data families aligned in a single response with lag-shift capability.
Side effects
- Invalid or unsupported state code returns error (only TX fully supported, CA/MS/WA limited)
- Coverage line not found in joined dataset returns empty or partial results
- Date range outside available data returns no rows
- Unsupported granularity for requested line (monthly/quarterly only available for line=all in TX)
- Missing required parameters returns 400 validation error
- Payment not processed (x402) returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"lag": 1,
"data": [
{
"period": "2023",
"premium": 5828639373.87,
"rate_period": "2022",
"filing_count": 448,
"max_increase": 85.6,
"premium_yoy_pct": 39.16,
"filings_with_pct": 436,
"share_increasing": 0.5,
"avg_rate_change_pct": 5.67
},
{
"period": "2024",
"premium": 6513015839.17,
"rate_period": "2023",
"filing_count": 491,
"max_increase": 97,
"premium_yoy_pct": 11.74,
"filings_with_pct": 477,
"share_increasing": 0.541,
"avg_rate_change_pct": 7.72
}
],
"line": "property",
"state": "TX",
"data_as_of": "2024",
"granularity": "year",
"rate_source": "Texas Department of Insurance - P&C Rate Filings (open data)",
"report_date": "2026-07-13",
"coverage_note": "Two aligned data families, not a prediction. Premium is E&S/surplus-lines; the rate side is admitted-market SERFF rate-filing activity, a leading indicator. Category join is TX annual; `lag` shifts the rate series.",
"premium_source": "SLTX Year to Year Comparison by Line of Business, 2025"
}
}Tags
x402
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