Getting started with RocketKey: buy a plan, get a key and test it with curl in 2 minutes

Buy a monthly plan with VietQR, get your RocketKey API key and test it with one curl command before setting up Claude Code, Codex, Cline or Cursor.

Updated 21 Oct 2026

RocketKey sells monthly API key plans: each plan has a daily USD cap that resets at 00:00 (GMT+7). The key works with Claude Code, Codex, Cline, Cursor and any tool that speaks the Anthropic or OpenAI-compatible API.

1. Pick a plan and pay

Open Pricing and pick the plan that fits your daily usage.
Sign in or create an account (email or Google).
Scan the VietQR code with your banking app. Keep the transfer note unchanged (the order code, like RK1234567) so the plan activates automatically.

Plans usually activate within minutes of the bank confirming the transfer.

2. Get your API key

Once paid, the order page shows your API key. The key is shown only once: copy it and keep it somewhere safe. If you lose it, create a new one in Dashboard → API keys.

3. Test the key with curl

This lists the models your key can use. It uses no tokens and does not count against your cap. Replace sk-rk-YOUR_KEY_HERE with your key:

Lists the models your key can use. A JSON list means the key works.

Check the key (free, no cap used) · macOS/Linux

curl "https://rocketkeyapi.indexes.social/v1/models" \
  -H "Authorization: Bearer sk-rk-YOUR_KEY_HERE"

Check the key (free, no cap used) · Windows PowerShell

curl.exe "https://rocketkeyapi.indexes.social/v1/models" -H "Authorization: Bearer sk-rk-YOUR_KEY_HERE"

A JSON reply with a data list means the key works. If you see an error, check Common errors.

4. Set up your tool

Pick the guide for your tool:

How the daily cap works

Each request costs the model's price on the Models page, in USD.
When the day's total reaches your plan's cap, requests are refused with error 402 until 00:00 (GMT+7). See error 402.
Unused cap does not roll over to the next day.
Track your usage in Dashboard → Usage.