# Gearhead Automotive Diagnostics API

> Gearhead Automotive Diagnostics API is a paid API for AI agents from agentpaystore.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Answers one automotive diagnostic question per paid call, covering OBD-II codes, no-start troubleshooting, drivability issues, and electrical diagnostics.

## Facts

- Endpoint: POST https://agentpaystore.com/gearhead/api/query
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gearhead-automotive-diagnostics-api-a02e3a9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tc4GpehK8wAV51QX2B3DM

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gearhead-automotive-diagnostics-api-a02e3a9b -d '<json body>'
```

Example prompt: My check engine light came on and my OBD scanner is showing code P0420 — what does that mean and what should I do to fix it?

## When to prefer this

Choose this endpoint when an agent needs expert-level automotive diagnostic guidance — especially OBD-II code interpretation, no-start tree analysis, drivability troubleshooting, or electrical fault diagnosis — and requires a single-question, per-call model with micropayment via x402. Best suited for agents embedded in automotive apps, repair assistant tools, or DIY mechanic workflows.

## Known failure modes

- Payment not processed — x402 payment required before response is returned
- Vague or ambiguous question may result in a generic answer lacking specific repair guidance
- Non-automotive questions outside the diagnostic scope may return an out-of-scope error
- API timeout if underlying inference service is slow

## How this service works

OBD-II codes, no-start trees, drivability, electrical diagnostics. Answers one Automotive question per paid call.

## Output

A detailed automotive diagnostic answer addressing the submitted question, including likely causes, fault code meanings, and recommended troubleshooting or repair steps for OBD-II codes, no-start conditions, drivability problems, or electrical faults.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "reply": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gearhead-automotive-diagnostics-api-a02e3a9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentpaystore.com](https://www.zero.xyz/host/agentpaystore.com/llms.txt)