Waveleta’s quickstart shows how to call its JSON-over-HTTPS API from Python or Node.js using an API key, with examples for crypto tickers, FX rates, and commodities. The examples below follow that guide; confirm the live API reference before relying on endpoint behavior, pricing, or data freshness in production.
What you need before making a request
- A Waveleta API key, stored outside your source code.
- Python with the third-party
requestspackage, or Node.js 18 or later for built-infetch. - Network access to the API base URL,
https://api.waveleta.com.
The Waveleta quickstart, published October 6, 2026, documents both an Authorization: Bearer header and an X-Api-Key header. Its examples use the Bearer form. A no-key health check at /v1/health is also described as free. Because the referenced OpenAPI document could not be independently checked, verify these details against Waveleta’s current API reference before building a production integration. Waveleta API quickstart.
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Make a first request
Start with a small request for three crypto tickers. The quickstart shows this curl pattern, using the Bearer authentication option:
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-H "Authorization: Bearer $WAVELETA_API_KEY"Set WAVELETA_API_KEY in your shell or deployment environment before running the command. The quickstart’s example response is JSON with an ok flag, a count, a tickers collection, and billing information; treat that response shape as documented by the tutorial rather than independently verified.
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Call the API from Python
The Python quickstart uses requests.Session, reads the key from an environment variable, and gives the HTTP request a timeout. Install requests in the project environment if it is not already available. This compact example demonstrates the same request and explicit handling for the two errors highlighted in the guide:
import os
import requests
BASE_URL = "https://api.waveleta.com"
API_KEY = os.environ["WAVELETA_API_KEY"]
session = requests.Session()
def get(path, params=None):
response = session.get(
f"{BASE_URL}{path}",
headers={"Authorization": f"Bearer {API_KEY}"},
params=params,
timeout=20,
)
if response.status_code == 402:
raise RuntimeError("Waveleta reports insufficient balance (HTTP 402)")
if response.status_code == 429:
raise RuntimeError("Waveleta rate limit reached (HTTP 429)")
response.raise_for_status()
return response.json()
crypto = get("/v1/crypto/tickers", {"limit": 3})
fx = get("/v1/fx/rates", {"base": "USD"})
commodities = get("/v1/commodities")
print(crypto)
print(fx)
print(commodities)The three paths shown—/v1/crypto/tickers, /v1/fx/rates, and /v1/commodities—are the quickstart’s example endpoint families. Its FX example requests daily rates. Check the live reference for supported query parameters, exact response fields, and available instruments; do not assume the illustrative base parameter or response format is a permanent contract.
Call the API from JavaScript
For Node.js 18 or later, the tutorial uses the runtime’s built-in fetch. Save the following as quickstart.mjs and run it with node quickstart.mjs. Set WAVELETA_API_KEY in the process environment first.
const BASE_URL = "https://api.waveleta.com";
const apiKey = process.env.WAVELETA_API_KEY;
if (!apiKey) {
throw new Error("Set WAVELETA_API_KEY before running this script");
}
async function get(path, params = {}) {
const url = new URL(path, BASE_URL);
for (const [key, value] of Object.entries(params)) {
url.searchParams.set(key, value);
}
const response = await fetch(url, {
headers: { Authorization: `Bearer ${apiKey}` },
});
if (response.status === 402) {
throw new Error("Waveleta reports insufficient balance (HTTP 402)");
}
if (response.status === 429) {
throw new Error("Waveleta rate limit reached (HTTP 429)");
}
if (!response.ok) {
throw new Error(`Waveleta request failed (HTTP ${response.status})`);
}
return response.json();
}
const crypto = await get("/v1/crypto/tickers", { limit: 3 });
const fx = await get("/v1/fx/rates", { base: "USD" });
const commodities = await get("/v1/commodities");
console.log({ crypto, fx, commodities });Use Python when the surrounding service is already Python-based and adding requests fits your dependencies. Choose Node.js when the application or tooling is Node-based and its built-in fetch is suitable. Both examples use the same base URL, Bearer key, and endpoint families.
Keep the API key out of browser code
Do not put the secret key in client-side JavaScript. A visitor can inspect browser-delivered code and requests, exposing credentials that could then be used by someone else. Make authenticated calls from a server, serverless function, or controlled build step instead, and pass only the data your front end needs.
- Load the key from an environment variable or a secrets manager.
- Do not commit a populated environment file or key to source control.
- If a key is exposed, revoke or rotate it through the account’s key-management process.
Understand the stated API costs and refresh cadence
The Waveleta quickstart states that API calls are prepaid at €0.002 each, with a €20 minimum top-up. Those are source-stated terms, not independently confirmed billing rules; check the current account or API documentation before estimating a budget.
The quickstart’s arithmetic illustrates why request frequency matters: one request per minute for 50 crypto markets over a 30-day month is 43,200 calls, or about €86 at the stated rate. Requesting once every ten minutes would be about €8.60 for the same period and call pattern. These are illustrations based on the tutorial’s assumptions, not an estimate of every integration’s actual usage.
To reduce unnecessary calls, the guide recommends caching in line with the data’s stated refresh cadence and requesting multiple rows with a larger limit where suitable. It describes crypto refreshes as every minute, FX as once each business day, and commodities as weekly; validate cadence and endpoint limits against current documentation before scheduling jobs around them.
Handle errors without assuming undocumented behavior
The quickstart calls out HTTP 402 for low balance and HTTP 429 for rate limiting. The examples stop with an explicit error rather than retrying automatically. For a production service, follow Waveleta’s current guidance for rate limits and retry timing; do not create a tight retry loop, which can worsen throttling and generate avoidable requests.
The tutorial also says invalid-key 401 responses and low-balance 402 rejections are not billed. Since billing behavior can change and was not independently verified, confirm that rule before using it in accounting or cost controls.
SDKs, OpenAPI, and product context
The quickstart says a dedicated SDK is unnecessary because the API uses JSON over HTTPS, and points to a public OpenAPI 3.1 document for client generation or import into tools such as Postman or Insomnia. The spec could not be retrieved for independent inspection, so confirm that it is currently available and matches the endpoints you intend to call before generating a client.
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Waveleta’s homepage describes its service as market intelligence and decision support, not a trade-execution or asset-custody product. It says crypto coverage includes 600+ markets, while US equities and FX are in early access; these are homepage statements accessed October 7, 2026, and availability may change. The homepage also says the service does not execute trades, hold assets, or provide personalized investment advice. Waveleta homepage.
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