Check for active liens and theft records on a vehicle by VIN using the CarsXE API. Use this when a user asks whether a car has a lien, is stolen, or wants to verify ownership is clean before buying.
SkillScore61Maintained
Automatic
◆Insurance Claims pack
Last verified 9/1/2026
What it changes
Passed 12 of 19 test cases with the skill, and 3 of 19 without it.
Without skill17%
With skill61%
Checks it passed that the model alone missed
Includes the parameter source=codex_plugin
Queries the URL https://api.carsxe.com/v1/lien-theft
Highlights active theft flags prominently as red flags
and 15 more in the full report
10 fixed4 passed either way9 still failing0 broke
Pass-rate lift
+43 pp
Tokens
+33%
Agent turns
0%
Response time
+45%
Model gemini-3.6-flashMeasured 9/1/2026v114 of 23 cases passed with skill · 19 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 10
Prompt
Check if there are any active theft flags or bank lien encumbrances on a Chevrolet Silverado (VIN: 1GC4YNEY4MF554433).
What was checked, without and with the skill
Checked
Without skill
With skill
Targets the endpoint https://api.carsxe.com/v1/lien-theft
Missed
Passed
Includes the parameter source=codex_plugin
Missed
Passed
case-10 · gemini-3.6-flash · 9/1/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md9 linessingle file
When the user asks about liens, theft status, or ownership encumbrances on a vehicle:
Make an HTTP GET request to the CarsXE Lien & Theft API:
GET https://api.carsxe.com/v1/lien-theft?key={CARSXE_API_KEY}&vin={VIN}&source=codex_plugin
Present the lien status and theft records clearly.
Highlight any active liens or theft flags prominently — these are critical red flags for buyers.
If the API key is missing, tell the user to set the CARSXE_API_KEY environment variable (see AGENTS.md).