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Sirius IDE Docs

Buying from a seller

If you don’t have crypto, you can buy a plan from a reseller — a third party who has crypto and is willing to pay on your behalf in exchange for fiat. Sirius itself is not the counterparty; we only process the crypto invoice on the buyer’s account.

This guide is the buyer-side version. Sellers should read For sellers → next.

Before you contact a seller

  1. Register your Sirius account (email + password).
  2. Verify your email by entering the 6-digit code. Without verification, your account cannot be signed in to — a seller would hit 403 Verify your email first and the deal stalls.
  3. Decide on a plan (Plus, Pro, Ultra). The seller will charge you the crypto-equivalent price plus their margin.

The safe handshake

You (buyer)                   Seller                       Sirius
   │                            │                            │
   │ — agree price + plan ─────►│                            │
   │ — temporary password ─────►│                            │
   │                            │ — signs in to your account │
   │                            │ — clicks "Buy plan" ──────►│
   │                            │ — pays crypto invoice ────►│
   │                            │                            │ — webhook activates plan on YOUR user_id
   │                            │ — signs out (mandatory!)   │
   │ ── sign in, verify plan ── │ ◄─ — — — — — — — — — — — ─ │
   │ ── ONLY NOW pay fiat ────► │                            │
   │ ── change password ─────── │ ─ — — — — — — — — — — — ─►│

Rules:

  1. Use a temporary password for the seller — not your real one.
  2. Verify the plan is active in your account before paying fiat.
  3. Change the password immediately after the seller confirms they logged out.

Sirius is not a party to the fiat transaction. If a dispute arises between you and the seller, we cannot reverse the plan activation. The order above is what protects you.

Why this isn’t a card-based shop

Cards & PayPal don’t survive in our market: chargebacks, payment-rail restrictions, and KYC issues kill margin. Resellers absorb the chargeback risk; you absorb the seller-trust risk, which the handshake above bounds.