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To make a first Waveleta API request, keep your API key on a server, put it in an environment variable, and send a GET request to the documented JSON-over-HTTPS endpoint. Use Python with requests if your project is Python-based, or Node.js 18+ with built-in fetch for JavaScript. The examples below follow Waveleta’s quickstart; verify endpoint details and current billing terms in the live API reference before relying on them in production.
Before you start: key, runtime, and endpoint
Waveleta’s quickstart says you need a developer API key and uses https://api.waveleta.com as the base URL. It shows either an Authorization: Bearer header or an X-Api-Key header. The examples below use Bearer authentication.
Set the key outside your source code. For example, in a Unix-like shell for the current session:
export WAVELETA_API_KEY='your-api-key'Do not commit a real key to a repository or embed it in browser JavaScript: anyone able to inspect the page or its network requests can retrieve it. Make requests from a server, serverless function, or a controlled build step, and use your deployment platform’s secret-management facility where available.
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The quickstart also describes /v1/health as a free health check that does not require a key. Treat that and the data endpoints as tutorial-described behavior: the referenced OpenAPI document was not independently verified here, so check the current API reference for exact paths, parameters, and response fields before production use.
Make a first request with curl
This example requests three crypto ticker rows, as shown in Waveleta’s quickstart:
curl --get 'https://api.waveleta.com/v1/crypto/tickers'
--data-urlencode 'limit=3'
--header "Authorization: Bearer $WAVELETA_API_KEY"The tutorial illustrates a JSON response with an ok flag, a count, a tickers collection, and billing information. Do not assume those field names or their types are a stable contract without checking the live reference.
Call the API from Python
The Python walkthrough uses the third-party requests package, a reusable session, an environment-variable lookup, and a timeout. Install the dependency in your project environment if it is not already present:
python -m pip install requestsSave a script such as waveleta_quickstart.py and run it in the shell where WAVELETA_API_KEY is set:
import os
import requests
BASE_URL = "https://api.waveleta.com"
API_KEY = os.environ["WAVELETA_API_KEY"]
session = requests.Session()
session.headers.update({"Authorization": f"Bearer {API_KEY}"})
def get_json(path, params=None):
response = session.get(
f"{BASE_URL}{path}",
params=params,
timeout=20,
)
if response.status_code == 402:
raise RuntimeError("Waveleta reports insufficient API balance (HTTP 402).")
if response.status_code == 429:
raise RuntimeError("Waveleta reports a rate limit (HTTP 429).")
response.raise_for_status()
return response.json()
crypto = get_json("/v1/crypto/tickers", {"limit": 3})
fx = get_json("/v1/fx/rates", {"period": "daily"})
commodities = get_json("/v1/commodities")
print(crypto)
print(fx)
print(commodities)The paths and the daily FX parameter follow the quickstart’s examples, but confirm the accepted query parameters and response shape against the current reference. The status handling illustrates how to distinguish the two conditions highlighted by the tutorial; it does not implement a retry policy.
Call the API from JavaScript on Node.js
The quickstart uses Node.js 18 or later, where fetch is built in, and runs the file as an ES module. Save this as quickstart.mjs and invoke it with node quickstart.mjs:
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteconst baseUrl = "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 getJson(path, params = {}) {
const url = new URL(path, baseUrl);
for (const [key, value] of Object.entries(params)) {
url.searchParams.set(key, String(value));
}
const response = await fetch(url, {
headers: { Authorization: `Bearer ${apiKey}` },
});
if (response.status === 402) {
throw new Error("Waveleta reports insufficient API balance (HTTP 402).");
}
if (response.status === 429) {
throw new Error("Waveleta reports a rate limit (HTTP 429).");
}
if (!response.ok) {
throw new Error(`Waveleta request failed: HTTP ${response.status}`);
}
return response.json();
}
const crypto = await getJson("/v1/crypto/tickers", { limit: 3 });
const fx = await getJson("/v1/fx/rates", { period: "daily" });
const commodities = await getJson("/v1/commodities");
console.log({ crypto, fx, commodities });As with the Python sample, the endpoint paths and parameter are those described in the quickstart, not a guarantee that the live API currently accepts them. Add application-specific handling for network failures and response validation before using returned data in downstream processes.
Which language should you use?
| Consideration | Python | JavaScript |
|---|---|---|
| Best fit | A Python application or script | A Node.js application or script |
| HTTP client | Third-party requests package |
Built-in fetch on Node.js 18+ |
| Environment variable | os.environ["WAVELETA_API_KEY"] |
process.env.WAVELETA_API_KEY |
| Run the example | python waveleta_quickstart.py |
node quickstart.mjs as an ES module |
| Error pattern shown | Handle 402 and 429, then call raise_for_status() |
Handle 402 and 429, then check response.ok |
The quickstart says a separate official SDK is unnecessary for a plain JSON-over-HTTPS API. It points to an OpenAPI 3.1 document for client generation or importing the API into tools such as Postman or Insomnia, but the document’s contents were not independently verified. Confirm its current availability and schema before generating a client or depending on a particular operation.
Understand the costs and reduce unnecessary requests
Waveleta’s API quickstart, published October 6, 2026, states prepaid pricing of €0.002 per call and a €20 minimum top-up. These are source-stated terms, not independently confirmed billing rules; check the current terms before estimating spend.
The quickstart’s arithmetic assumes a 30-day month and one call per minute: 43,200 calls would cost about €86 at the stated rate. At one call every ten minutes, it estimates about €8.60 for that same interval. Those totals are illustrative and exclude any terms or changes not described in the tutorial.
To avoid repeated requests for unchanged data, the quickstart recommends caching in line with the data’s stated refresh cadence and asking for multiple rows with a limit parameter where supported. It describes crypto data as refreshing every minute, FX once each business day, and commodities weekly. Confirm the cadence and endpoint behavior for the data you use; a refresh interval is not, by itself, a promise that each request produces new data.
Handle errors without leaking credentials
- HTTP 402: The quickstart identifies this as a low-balance response. Check the account balance and current billing rules rather than retrying the same call repeatedly.
- HTTP 429: The quickstart identifies this as rate limiting. Reduce request frequency and consult the current API reference for any documented limits or retry guidance; the tutorial does not specify a production backoff policy.
- Other unsuccessful responses: Surface the HTTP status and useful response details safely, then investigate the request. Avoid logging authorization headers or the API key.
- Missing or invalid key: Confirm the environment variable is available to the running process and that the key is current. The tutorial states that invalid-key 401 and low-balance 402 rejections are not billed; verify that rule with current billing terms before relying on it.
Never move a secret key into browser code to work around a server-side configuration problem. Have the browser call your own backend, which can authenticate to Waveleta without exposing the secret to visitors.
What Waveleta’s API is for
Waveleta’s homepage describes its product as market intelligence and decision-support software. It says the service does not execute trades, hold assets, or provide personalized investment advice. The homepage, accessed October 7, 2026, described 600+ crypto markets and US equities and FX as early access; product coverage and availability can change, so confirm them on the current site. API data should not be treated as a trade instruction or as a substitute for validating data against your own requirements.
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