# Trip Skeleton Intent

Give route and dates, get flights and hotels (and events when location is set).

- endpoint: `GET https://marketplaceforaiagents.com/api/public/v1/trip-skeleton`
- category: intents
- price: $0.005 USDC per call (5000 atomic, 6 decimals)
- free tier: 3 calls per agent identity, shared across all endpoints (unknown/generic clients draw from a site-wide 100 successful free calls per UTC day; crawlers get none)
- settlement: USDC on Base mainnet `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`, payee `0x05e82e03753c7bc99fb24d10a876cce53f24b7b7`, scheme `exact`
- sandbox: append `?network=base-sepolia` for testnet USDC + mock data
- results key: `results`
- html: https://marketplaceforaiagents.com/listings/trip-skeleton

## What it returns

The bones of a trip in one call: priced flight itineraries and hotel options for the same dates, plus local events when a location is supplied.

## Use cases

- Draft an itinerary before human approval
- Travel budget estimation
- Compare trip windows

## Parameters

| param | type | required | default | description |
| --- | --- | --- | --- | --- |
| `departure_id` | string | yes | — | Origin airport or city code, e.g. ORD |
| `arrival_id` | string | yes | — | Destination airport or city code, e.g. LAX |
| `outbound_date` | date | yes | — | YYYY-MM-DD |
| `return_date` | date | no | — | YYYY-MM-DD for round trips. Omit for one-way. |
| `destination` | string | no | — | Hotel search destination. Defaults to arrival_id. |
| `check_in_date` | date | no | — | Hotel check-in. Defaults to outbound_date. |
| `check_out_date` | date | no | — | Hotel check-out. Defaults to return_date or outbound_date. |
| `location` | string | no | — | When set, adds a Google Events step for that location. |
| `currency` | string | no | USD | Currency code |

## Example call

```bash
curl -s "https://marketplaceforaiagents.com/api/public/v1/trip-skeleton?departure_id=example&arrival_id=example&outbound_date=example"
```

## Response shape

```json
{
  "intent": "trip-skeleton",
  "chain": [
    "google-flights",
    "google-hotels",
    "google-events"
  ],
  "steps_run": 3,
  "results": {
    "google-flights": {
      "note": "Normalized response of /api/public/v1/google-flights"
    },
    "google-hotels": {
      "note": "Normalized response of /api/public/v1/google-hotels"
    },
    "google-events": {
      "note": "Normalized response of /api/public/v1/google-events"
    }
  }
}
```

## Payment

1. Call without `X-PAYMENT`. The first 3 calls per identity (across all endpoints) return 200 with an `X-Free-Calls-Remaining` header.
2. After that the response is `402` with an `accepts[]` requirement.
3. Sign the EIP-3009 USDC authorization, base64 the x402 payload, resend as `X-PAYMENT`.
4. Settlement receipt returns in the `X-PAYMENT-RESPONSE` header.