Retrieve a vehicle history report from a VIN using the CarsXE API. Use this when a user wants to know a car's history — past owners, accidents, title status, odometer readings, or whether it's been in a crash.
SkillScore71Maintained
Automatic
◆Insurance Claims pack
Last verified 9/1/2026
What it changes
Passed 16 of 23 test cases with the skill, and 14 of 23 without it.
Without skill63%
With skill71%
Checks it passed that the model alone missed
Includes the source parameter in the GET request.
Sets the source query parameter value to codex_plugin.
Constructs the request URL targeting https://api.carsxe.com/history.
and 2 more in the full report
4 fixed13 passed either way5 still failing2 broke
Pass-rate lift
+8 pp
Tokens
-12%
Agent turns
0%
Response time
-25%
Model gemini-3.6-flashMeasured 9/1/2026v117 of 24 cases passed with skill · 23 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 4
Prompt
What source identification parameter value must be appended in the query parameters when making history API requests for VIN 1G1YY26E455100000?
What was checked, without and with the skill
Checked
Without skill
With skill
Sets the source query parameter value to codex_plugin.
Missed
Passed
Includes the source parameter in the GET request.
Missed
Passed
case-07 · 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.md14 linessingle file
When the user asks about a vehicle's history, past accidents, title status, or ownership:
Make an HTTP GET request to the CarsXE History API:
GET https://api.carsxe.com/history?key={CARSXE_API_KEY}&vin={VIN}&source=codex_plugin
Summarize the history report:
Number of previous owners
Accident / damage records
Title status (clean, salvage, rebuilt, lemon)
Odometer history
Theft records
Clearly highlight any red flags (salvage title, accidents, odometer rollback).
If the API key is missing, tell the user to set the CARSXE_API_KEY environment variable (see AGENTS.md).