Skill: Multi-stop trip planner

Plan a multi-stop journey deterministically: geocode each stop, sum the pairwise haversine distances, estimate arrival times by adding driving hours per leg, count business days from today to each arrival, and pull the weather forecast at every US stop. Send POST /api/skill/trip-planner with the required fields stops and startIso and pay $0.006 per call over x402 or MPP (there is no free tier). It returns a JSON object with pack, args, steps and summary.

Six tools - three pure-CPU (math + time), three egress (geocoding + weather) - covering the deterministic skeleton of every road-trip / sales-tour / delivery-route planning problem. Multi-stop trip planner skill pack: one x402 payment runs 6 underlying tools (geocode, geo-distance, add-time, business-days, time-convert, weather-forecast); partial-success per step.

Category: Skill packs · Tags: skill-pack workflow trip-planner · Pack overview

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/skill/trip-planner \
  -H "Content-Type: application/json" \
  -d '{"stops":"New York NY, Pittsburgh PA, Cleveland OH, Chicago IL","startIso":"2026-07-20T08:00:00Z"}'

Without payment this returns HTTP 402 Payment Required with the exact price for skill-trip-planner; any x402 v2 or MPP client pays it and retries.

Example response

{
  "pack": "trip-planner",
  "args": {
    "stops": "New York NY, Pittsburgh PA, Cleveland OH, Chicago IL",
    "startIso": "2026-07-20T08:00:00Z"
  },
  "steps": [
    {
      "slug": "geocode",
      "ok": true,
      "result": {}
    },
    {
      "slug": "geo-distance",
      "ok": true,
      "result": {}
    },
    {
      "slug": "add-time",
      "ok": true,
      "result": {}
    },
    {
      "slug": "business-days",
      "ok": true,
      "result": {}
    },
    {
      "slug": "time-convert",
      "ok": true,
      "result": {}
    },
    {
      "slug": "weather-forecast",
      "ok": true,
      "result": {}
    }
  ],
  "summary": "6/6 steps succeeded"
}

From an MCP client

catalog.call {
  "slug": "skill-trip-planner",
  "params": {
    "stops": "New York NY, Pittsburgh PA, Cleveland OH, Chicago IL",
    "startIso": "2026-07-20T08:00:00Z"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for skill-trip-planner; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• Arguments left out fall back to the pack's own defaults. Each step reports on its own; the call succeeds when at least one step does, and a run where every step fails is refused (400 when the input caused it, 502 otherwise).
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/skill/trip-planner returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/skill/trip-planner", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "stops": "New York NY, Pittsburgh PA, Cleveland OH, Chicago IL",
    "startIso": "2026-07-20T08:00:00Z"
  }),
});

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