# TravelCheck Connection Risk

> TravelCheck Connection Risk is a paid API for AI agents from travelcheck-x402.fly.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).

Assesses the risk of missing a flight connection given inbound/outbound itinerary times, a caller-specified minimum connection window, and live airport conditions at the connecting airport.

## Facts

- Endpoint: POST https://travelcheck-x402.fly.dev/v1/connection-risk
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/travelcheck-connection-risk-b8522a27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1jF6i01TWTvH1fRpwy2o3

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 travelcheck-connection-risk-b8522a27 -d '<json body>'
```

Example prompt: My inbound flight AA123 is scheduled to arrive at ORD at 2024-08-15T14:30:00-05:00 but estimated at 2024-08-15T15:10:00-05:00, and my outbound UA456 departs at 2024-08-15T15:50:00-05:00 — can you assess the missed-connection risk using a minimum connection time of 45 minutes?

## When to prefer this

Use this endpoint when you need a composite risk score for a specific flight connection that blends itinerary timing (scheduled vs. estimated arrivals/departures) with live airport operational conditions, rather than separately checking flight status and airport risk. It is purpose-built for the missed-connection question and handles the time-buffer computation and airport condition weighting in a single call. Prefer it over the sibling Airport Risk endpoint when you need connection-specific analysis rather than general airport disruption risk.

## Known failure modes

- Invalid airport code format (must be 3-4 uppercase alphanumeric) returns a validation error
- Scheduled time missing from inbound or outbound object returns a 422 or schema validation error
- minimumConnectionMinutes outside the 10–300 range returns a validation error
- Unknown or unsupported airport may result in degraded assessment lacking live condition data
- Payment not provided or insufficient USDC triggers a 402 Payment Required response
- Malformed ISO 8601 datetime strings cause schema rejection

## How this service works

Assess missed-connection risk from itinerary times, caller-supplied minimum connection time, and live airport conditions.

## Output

Returns a structured risk assessment for the specified connection, incorporating the scheduled and estimated times of inbound and outbound flights, the caller's minimum acceptable connection window, and live operational/weather conditions at the connecting airport. Likely includes a risk score or rating and supporting reasoning about buffer time and airport conditions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "inbound": {
   "type": "object",
   "required": [
    "scheduled"
   ],
   "properties": {
    "flight": {
     "type": "string",
     "pattern": "^[A-Za-z0-9 -]+$",
     "maxLength": 16,
     "minLength": 2
    },
    "estimated": {
     "anyOf": [
      {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$"
      },
      {
       "type": "null"
      }
     ]
    },
    "scheduled": {
     "type": "string",
     "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$"
    }
   },
   "additionalProperties": false
  },
  "outbound": {
   "type": "object",
   "required": [
    "scheduled"
   ],
   "properties": {
    "flight": {
     "type": "string",
     "pattern": "^[A-Za-z0-9 -]+$",
     "maxLength": 16,
     "minLength": 2
    },
    "estimated": {
     "anyOf": [
      {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$"
      },
      {
       "type": "null"
      }
     ]
    },
    "scheduled": {
     "type": "string",
     "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$"
    }
   },
   "additionalProperties": false
  },
  "connectionAirport": {
   "type": "string",
   "pattern": "^[A-Z0-9]{3,4}$"
  },
  "minimumConnectionMinutes": {
   "type": "integer",
   "maximum": 300,
   "minimum": 10
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/travelcheck-connection-risk-b8522a27/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from travelcheck-x402.fly.dev](https://www.zero.xyz/host/travelcheck-x402.fly.dev/llms.txt)