# Haulroll FMCSA Carrier Vetting API

> Haulroll FMCSA Carrier Vetting API is a paid API for AI agents from haulroll-api.cybermax-tools.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).

Vets up to 25 trucking carriers per call by pulling FMCSA authority, insurance, out-of-service status, and safety data for a given list of DOT/MC/MX numbers.

## Facts

- Endpoint: GET https://haulroll-api.cybermax-tools.workers.dev/x402/api/alerts?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/haulroll-fmcsa-carrier-vetting-api-d520ce38
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oLMMfig3y6bfan8JFgoFR

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 haulroll-fmcsa-carrier-vetting-api-d520ce38
```

Example prompt: Can you vet these trucking carriers for me before I tender the load — DOT numbers 1234567 and 7654321 — check their authority, insurance, and any safety flags over the last 60 days?

## When to prefer this

Use this endpoint when you need real-time FMCSA-sourced carrier authority, insurance, OOS, and safety data before tendering freight, especially when screening up to 25 carriers in a single call. Prefer this over manual FMCSA portal lookups or generic business lookup APIs when you need structured, agent-consumable carrier compliance data in a freight logistics workflow.

## Known failure modes

- Invalid or non-existent DOT/MC number returns no data or an error for that carrier
- Exceeding 25 carriers per call may result in an error or truncated results
- Look-back window outside 1-365 days range may return a validation error
- FMCSA data unavailable or delayed may result in stale or missing fields
- Malformed query parameter format causes a 400-level error

## How this service works

Vet a trucking carrier before you tender the load. FMCSA carrier vetting API + MCP: authority, insurance, OOS, safety, 25 carriers per call Try it free in one click, no sign-up.

## Output

Returns a JSON object containing per-carrier alert data including authority status, insurance validity, out-of-service (OOS) status, and safety information for each queried DOT/MC/MX number, covering the requested look-back window.

## 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": {
      "dot": {
       "type": "string",
       "description": "USDOT numbers and/or MC/MX/FF docket numbers, up to 25, separated by commas or spaces (or POST {\"carriers\": [...]})"
      },
      "days": {
       "type": "integer",
       "default": 30,
       "description": "Look-back window in days (1-365)"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/haulroll-fmcsa-carrier-vetting-api-d520ce38/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from haulroll-api.cybermax-tools.workers.dev](https://www.zero.xyz/host/haulroll-api.cybermax-tools.workers.dev/llms.txt)