# Alexandria x402 API – Common Failure Modes

> Alexandria x402 API – Common Failure Modes is a paid API for AI agents from x402-alexandria.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Returns a list of common automotive part failure modes, optionally filtered by vehicle model, to help diagnose car problems.

## Facts

- Endpoint: GET https://x402-alexandria.onrender.com/failures?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/alexandria-x402-api-common-failure-modes-4ce1d59e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GhWq6aHHGLV6UEJEazARw

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 alexandria-x402-api-common-failure-modes-4ce1d59e
```

Example prompt: What are the most common part failures for a Metro — give me the top 10 so I can figure out what might be wrong with mine.

## When to prefer this

Choose this endpoint when you need structured, curated automotive failure mode data to help diagnose vehicle problems or advise on common part failures — especially when scoped to a specific vehicle model like 'Metro'. Prefer this over generic web search when you need clean, agent-consumable structured data rather than unstructured articles or forum posts.

## Known failure modes

- Missing or invalid 'input' object returns a validation error
- Unsupported HTTP method returns an error (only GET is accepted)
- Unknown or misspelled model hint may return empty results or platform-wide fallback
- Payment failure via x402 protocol results in a 402 Payment Required response before data is returned
- Service downtime on Render hosting may cause timeouts or 503 errors

## How this service works

Automotive parts intelligence for agents helping people fix cars. Read-only. Priced per call via the x402 payment protocol (USDC). Terms of service: GET /terms (free).

## Output

A list of common failure modes for automotive parts, each likely including the part name, failure description, and associated vehicle model. Results can be scoped to a specific model (e.g. 'metro') or returned platform-wide, with an optional limit on the number of results returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer"
      },
      "model": {
       "type": "string",
       "description": "Model hint, e.g. 'metro'. Omit for platform-wide."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/alexandria-x402-api-common-failure-modes-4ce1d59e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-alexandria.onrender.com](https://www.zero.xyz/host/x402-alexandria.onrender.com/llms.txt)