Fewsats MCP Server

The l402_offer parameter must be a dict with this structure:
{
    'offers': [
        {
            'id': 'test_offer_2',        # String identifier for the offer
            'amount': 1,                 # Numeric cost value
            'currency': 'usd',           # Currency code
            'description': 'Test offer', # Text description
            'title': 'Test Package'      # Title of the package
        }
    ],
    'payment_context_token': '60a8e027-8b8b-4ccf-b2b9-380ed0930283',  # Payment context token
    'payment_request_url': 'https://api.fewsats.com/v0/l402/payment-request',  # Payment URL
    'version': '0.2.2'  # API version
}

Returns payment status response.
If payment status is `needs_review` inform the user he will have to approve it at app.fewsats.com

Creates a payment header for the X402 protocol.

The chain is base-sepolia or base
The x402 payload must be a dict with this structure:
{
    "accepts": [
        {
            "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
            "description": "Payment for GET https://proxy402.com/7Yhuf2O3zs",
            "extra": {
                "name": "USDC",
                "version": "2"
            },
            "maxAmountRequired": "10",
            "maxTimeoutSeconds": 300,
            "mimeType": "",
            "network": "base-sepolia",
            "payTo": "0xbA5Ae80f48E0C74878c1a362D69c27c2135Aa594",
            "resource": "https://proxy402.com/7Yhuf2O3zs",
            "scheme": "exact"
        }
    ],
    "error": "X-PAYMENT header is required",
    "x402Version": 1
}

Returns a dict with the payment_header field that must be set in X-PAYMENT header in a x402 http request.