ToolVet
75trust / 100

Marine Waves

by Saylor Innovations Data Desk in Weather & location

x402 APIPassing, checked 2 h ago

Ocean wave height forecast - current wave height, period, direction, swell and sea state with a 5-day forecast for any ocean coordinate

GET
https://saylorinnovations.com/api/marine/waves
Price
$0.01
per call in USDC
Uptime
100%
last 30 days
Response time
621 ms
906 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://saylorinnovations.com/api/marine/waves

Each call costs $0.01 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://saylorinnovations.com/api/marine/waves?lat=40&lon=-70

Parameters

ParameterTypeRequiredDescription
latstringYesLatitude in decimal degrees, e.g. 40.71
lonstringYesLongitude in decimal degrees, e.g. -74.01

Example response

The provider's example. We can't check it without paying.

Example response, 53 lines
{
  "forecast": [
    {
      "date": "2026-10-12",
      "swell_height_max_m": 2.9,
      "wave_height_max_m": 3.34,
      "wave_period_max_s": 8.25
    },
    {
      "date": "2026-10-13",
      "swell_height_max_m": 1.52,
      "wave_height_max_m": 1.76,
      "wave_period_max_s": 7.3
    },
    {
      "date": "2026-10-14",
      "swell_height_max_m": 1.12,
      "wave_height_max_m": 1.78,
      "wave_period_max_s": 5.8
    },
    {
      "date": "2026-10-15",
      "swell_height_max_m": 1.18,
      "wave_height_max_m": 1.62,
      "wave_period_max_s": 6.55
    },
    {
      "date": "2026-10-16",
      "swell_height_max_m": 1.56,
      "wave_height_max_m": 3.46,
      "wave_period_max_s": 6.85
    }
  ],
  "location": {
    "grid_lat": 40.041664,
    "grid_lon": -70.04166,
    "lat": 40,
    "lon": -70,
    "timezone": "Etc/GMT+5"
  },
  "observed_at": "2026-10-12T16:00",
  "sea_state": "rough",
  "source": "Open-Meteo marine (ECMWF WAM / DWD)",
  "swell": {
    "direction_deg": 188,
    "height_m": 2.04,
    "period_s": 7
  },
  "wave_direction_deg": 201,
  "wave_height_m": 2.54,
  "wave_period_s": 7.15,
  "wind_wave_height_m": 1.46
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/marine/waves?lat=40&lon=-70'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://saylorinnovations.com/api/marine/waves?lat=40&lon=-70' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fmarine%2Fwaves
const res = await pay("https://saylorinnovations.com/api/marine/waves?lat=40&lon=-70");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/marine/waves?lat=40&lon=-70")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402906 ms$0.01
7 h agoPassed402590 ms$0.01
12 h agoPassed402621 ms$0.01