How to create and use a Vantafin API key

An API key authenticates your requests to Vantafin's developer surfaces: the REST API, WebSocket streams, and the MCP server. Keys look like vf-live-... and are created in Settings. API access is available on the Pro and Ultimate plans. This guide shows how to generate a key and use it.

Create your API key

Open Settings.
Go to the API keys section.
Generate a new key and copy it immediately - treat it like a password.
Store it somewhere safe (a secret manager or environment variable), not in client-side code.

If a key is ever exposed, revoke it in the same section and generate a new one.

Authenticate a request

You can pass your key three ways. Choose whichever fits your client:

Method	How	Best for
Bearer token	`Authorization: Bearer vf-live-...`	Most HTTP clients
Header	`X-API-Key: vf-live-...`	Simple header-based auth
Query string	`?apiKey=vf-live-...`	Quick tests, WebSocket URLs

Example: a REST request with curl

curl "https://api.vantafin.com/v1/..." \
  -H "Authorization: Bearer vf-live-YOUR_KEY"

Example: setting the key as an environment variable

export VANTAFIN_API_KEY="vf-live-YOUR_KEY"

Then reference VANTAFIN_API_KEY from your code instead of hard-coding the key.

Rate limits and usage

Each plan has a per-minute request limit and requests are logged. You can monitor your usage and rate limits in Settings. Ultimate offers the highest limits. The exact numbers are on the pricing page.

Keep your key secure

Never commit keys to source control or ship them in frontend code.
Prefer environment variables or a secrets manager.
Rotate keys periodically and revoke unused ones.

Where to go next

Frequently asked questions

Which plans include API access?

What do I do if my key leaks?

How do I check my rate limit and usage?

How do I authenticate API requests?

Where should I store my API key?

Important Disclaimer

This article is for informational and educational purposes only and does not constitute investment advice, financial advice, trading advice, tax advice, legal advice, or any other form of professional advice. DTS Analytics LLC (operating as Vantafin) is not a registered investment adviser, broker-dealer, or fiduciary. Market data, figures, and other information on Vantafin may be delayed, incomplete, or incorrect and are provided without warranty. Nothing herein should be construed as a solicitation, recommendation, endorsement, or offer to buy, sell, hold, or trade any security or other financial instrument. Past performance is not indicative of future results. You should independently verify all information and consult a qualified and licensed financial professional before making any investment or financial decision. You are solely responsible for your own investment, trading, and financial decisions, and DTS Analytics LLC is not liable for any losses arising from your use of or reliance on this content.