---
name: api.querylines.com
description: api.querylines.com exposes surplus lines insurance market data sourced from FSLSO (Florida Surplus Lines Service Office) reports. It returns ranked lists of insurers by written premium for a given US state and time period, including market share, policy counts, and year-over-year changes.
host: api.querylines.com
---

# api.querylines.com

This host serves agents and analysts that need structured, historical surplus lines market intelligence for US states. It provides a single endpoint for retrieving insurer rankings by premium volume, derived from official FSLSO regulatory filings. It does not offer real-time pricing, policy binding, or coverage outside FSLSO-reported states and periods.

## When to use this host

Use this host when an agent needs to identify which surplus lines carriers are most active in a specific US state for a historical reporting period (month, half-year, or full year), or when comparing market share and premium volume across insurers. Do not use this host for real-time insurance quotes, policy binding, or carrier lookups outside FSLSO-covered states and periods. For admitted market carrier data or real-time pricing, a different insurance data provider would be required.

## Capabilities

### Surplus Lines Market Rankings

Retrieves ranked insurer data by written premium for a specified US state and reporting period, including market share, policy counts, year-over-year change, and optional financial ratios from FSLSO reports.

- **`fetch-state-insurers-ranked`** — Returns a ranked list of surplus lines insurers for a given US state and time period, including premium, policy count, market share, year-over-year change, and optional financial ratios sourced from FSLSO reports.

## Skill reference

### `fetch-state-insurers-ranked`

**State Insurers Ranked by Premium** — Returns a ranked list of surplus lines insurers for a given US state and time period, including premium, policy count, market share, year-over-year change, and optional financial ratios sourced from FSLSO reports.

*Use when:* Use when an agent needs to identify the top insurance carriers by written premium in a specific US state for a given month, half-year, or full year, along with market share and available financial strength data.

*Not for:* Do not use for real-time pricing quotes or policy binding; this endpoint returns historical premium report data only. Not suitable for states or periods not covered by FSLSO reporting.

**Inputs:**

- `state` (string, required) — Two-letter US state code for which to retrieve insurer rankings. Supported values include FL, TX, CA, IL, WA, NY.
- `period` (string, required) — Reporting period: a month (YYYY-MM), half-year (YYYY-H1 or YYYY-H2), or full year (YYYY). Must match pattern ^\d{4}(-\d{2}|-H[12])?$.

**Returns:** Returns state, period, report_date, source, and an insurers array of up to 10 ranked carriers with premium in dollars, policy_count, market_share percentage, yoy_premium_pct, and a financials sub-object (or null) containing combined_ratio and losses_incurred_ratio.

**Example:** `GET https://api.querylines.com/v1/insurers?state=FL&period=2026-06`

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