Put jurisdiction intelligence inside the checkout flow.
Gun-Go gives FFLs and POS teams a deterministic, source-linked on-ramp for building location-aware firearm workflows. Resolve a state, pilot slug, or coordinate pair; receive one predictable jurisdiction brief your product can render, log, or review.
01 / Request
Start with one clear input.
Choose exactly one selector mode. State accepts a two-letter code or supported state name. The slug selector is sent as jurisdiction in the query string.
Coordinates require both lat and lng, with latitude from -90 to 90 and longitude from -180 to 180.
Do not mix state or jurisdiction with coordinates. Postal-code lookup is not supported.
The current pilot resolver covers Colorado, Kansas, and Texas aliases and locations. Treat an unsupported selector as a lookup miss, not as a legal conclusion.
curl "/api/jurisdiction-lookup?state=TX"curl "/api/jurisdiction-lookup?jurisdiction=texas"curl "/api/jurisdiction-lookup?lat=31.9686&lng=-99.9018"02 / Response
Four slots. No guessing.
The selected jurisdiction always returns the same four categories: carry, magazine, transport, and duty-to-inform. A slot can be present with rule: null when no current rule record is available.
Useful for integrators
- • Store the rule id with the transaction or cart review.
- • Render the label and summary in your own workflow.
- • Keep sourceUrl available for a human verification step.
{
"id": "texas",
"name": "Texas",
"abbreviation": "TX",
"rules": [
{
"category": "carry",
"rule": {
"id": "catalog-texas-carry",
"category": "carry",
"label": "Concealed carry",
"summary": "Texas generally permits a person who may lawfully possess a firearm to carry a handgun without a license, subject to location-specific restrictions and the limits in Chapter 46. License holders remain subject to additional notice and location rules.",
"effectiveFrom": "2026-08-30T00:00:00.000Z",
"updatedAt": "2026-08-30T00:00:00.000Z",
"reviewStatus": "reviewed",
"sourceLabel": "Texas Penal Code § 46.02 — Unlawful Carrying Weapons",
"sourceUrl": "https://statutes.capitol.texas.gov/Docs/PE/htm/PE.46.htm#46.02",
"revisions": [
{
"changedAt": "2026-08-30T00:00:00.000Z",
"changeSummary": "Reviewed the current official Chapter 46 carry provisions."
}
],
"history": [
{
"timestamp": "2026-08-30T00:00:00.000Z",
"kind": "reviewed",
"summary": "Current review status: Reviewed."
},
{
"timestamp": "2026-08-30T00:00:00.000Z",
"kind": "revised",
"summary": "Reviewed the current official Chapter 46 carry provisions."
}
]
}
},
{
"category": "magazine",
"rule": null
},
{
"category": "transport",
"rule": {
"id": "catalog-texas-transport",
"category": "transport",
"label": "Transport in a private vehicle",
"summary": "Texas Penal Code § 46.02 addresses carrying a handgun inside of or directly en route to a motor vehicle or watercraft owned by or under a person’s control, while prohibited-person and location restrictions remain applicable.",
"effectiveFrom": "2026-08-30T00:00:00.000Z",
"updatedAt": "2026-08-30T00:00:00.000Z",
"reviewStatus": "reviewed",
"sourceLabel": "Texas Penal Code Chapter 46 — Weapons",
"sourceUrl": "https://statutes.capitol.texas.gov/Docs/PE/htm/PE.46.htm#46.02",
"revisions": [],
"history": [
{
"timestamp": "2026-08-30T00:00:00.000Z",
"kind": "reviewed",
"summary": "Current review status: Reviewed."
}
]
}
},
{
"category": "duty-to-inform",
"rule": null
}
]
}03 / Evidence
The brief comes with its paper trail.
A populated rule includes the citation pair, effective and update timestamps, plus change and review context so your team can decide when to surface a re-check. The reviewStatus value describes the returned review state; effectiveFrom and updatedAt anchor it in time.
sourceLabel names the authority; sourceUrl points your reviewer to the cited source.revisions[] lists changedAt and changeSummary for recorded rule changes.history[] exposes timestamp, kind, and summary for review and revision events.Informational, not legal advice.
Timestamps and citations describe the returned dataset; they are not a guarantee of legal advice, completeness, or freshness beyond those timestamps. Verify the current official source and consult qualified counsel for a decision that matters.