MPC Accept Crypto Payments

Merchant-side skill for accepting crypto payments on Solana via MoonPay Commerce (formerly Helio).

Setup

Run the setup script with your API credentials (wallet ID is fetched automatically):

bash scripts/setup.sh

You'll need:

API Key — from https://app.hel.io → Settings → API Keys
API Secret — from the same page (save it when generated)

The setup script will:

Validate your credentials against the API
Fetch your Solana wallets automatically
Select the PAYOUT wallet (or CONNECTED if no PAYOUT exists)
Save everything to ~/.mpc/helio/config

If the user doesn't have an account, direct them to https://app.hel.io to sign up.

Config Management

bash scripts/setup.sh status   # Show current config
bash scripts/setup.sh clear    # Remove saved credentials

Quick Reference

Base URL: https://api.hel.io/v1

List Supported Currencies (no auth needed)

curl -s https://api.hel.io/v1/currency | jq '.[].symbol'

Create a Pay Link

curl -s -X POST "https://api.hel.io/v1/paylink/create/api-key?apiKey=$HELIO_API_KEY" \
  -H "Authorization: Bearer $HELIO_API_SECRET" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My Payment",
    "template": "OTHER",
    "pricingCurrency": "<CURRENCY_ID>",
    "price": "<AMOUNT_IN_BASE_UNITS>",
    "features": {
      "canChangePrice": false,
      "canChangeQuantity": false,
      "canSwapTokens": true
    },
    "recipients": [{
      "currencyId": "<CURRENCY_ID>",
      "walletId": "<YOUR_WALLET_ID>"
    }]
  }'

Defaults: Currency is USDC (6340313846e4f91b8abc519b). Token swapping is enabled so payers can pay with any supported Solana token (auto-converted to USDC).

Price format: price is in base units (int64 string). For USDC (6 decimals): "1000000" = 1 USDC. For SOL (9 decimals): "1000000000" = 1 SOL.

Create a Charge (Checkout URL)

curl -s -X POST "https://api.hel.io/v1/charge/api-key?apiKey=$HELIO_API_KEY" \
  -H "Authorization: Bearer $HELIO_API_SECRET" \
  -H "Content-Type: application/json" \
  -d '{"paymentRequestId": "<PAYLINK_ID>"}'

Returns { "id": "...", "pageUrl": "https://..." } — share pageUrl with the payer.

Check Transactions

curl -s "https://api.hel.io/v1/paylink/<PAYLINK_ID>/transactions?apiKey=$HELIO_API_KEY" \
  -H "Authorization: Bearer $HELIO_API_SECRET"

Disable / Enable a Pay Link

curl -s -X PATCH "https://api.hel.io/v1/paylink/<PAYLINK_ID>/disable?apiKey=$HELIO_API_KEY&disabled=true" \
  -H "Authorization: Bearer $HELIO_API_SECRET"

Helper Script


# Setup (run first)
bash scripts/setup.sh

# Operations
bash scripts/helio.sh currencies
bash scripts/helio.sh create-paylink "Coffee" 5.00 USDC
bash scripts/helio.sh charge <paylink-id>
bash scripts/helio.sh transactions <paylink-id>
bash scripts/helio.sh disable <paylink-id>
bash scripts/helio.sh enable <paylink-id>

Templates

The template field controls Pay Link type:

OTHER — generic payment
PRODUCT — physical/digital product
INVOICE — invoice
SUBSCRIPTION — recurring (requires subscriptionDetails)
EVENT — event ticket

Credential Handling

When setting up credentials, run the setup script interactively:

bash scripts/setup.sh

The script prompts for credentials directly in the terminal — they are never stored in chat history or logs. Credentials are saved to ~/.mpc/helio/config (mode 600).

Advanced

Full API schema details: see references/api-reference.md
OpenAPI spec: https://api.hel.io/v1/docs-json
Dashboard: https://app.hel.io
Docs: https://docs.hel.io

MoonPay Commerce (Helio) Accept Crypto Payments