Example: L402-paywalled API endpoints for testing #21

Great work on the L402 tool support. I run a couple of live L402 endpoints that could be useful as integration examples or for testing the L402 flow:

Text Generation (21 sats/query)

# Step 1: Get invoice
curl -X POST https://maximumsats.com/api/dvm \
  -H "Content-Type: application/json" \
  -d '{"prompt": "Explain the Lightning Network in one sentence"}'
# Returns 402 + Lightning invoice

# Step 2: Pay invoice, then retry with payment hash
curl -X POST https://maximumsats.com/api/dvm \
  -H "Content-Type: application/json" \
  -H "Authorization: L402 <payment_hash>" \
  -d '{"prompt": "Explain the Lightning Network in one sentence"}'

Image Generation (100 sats/image)

POST https://maximumsats.com/api/imagegen

Stats/Metadata

GET https://maximumsats.com/stats

Stack: Cloudflare Workers + LNbits + Groq (Llama 3.3 70B) / Workers AI (FLUX.1 Schnell). Standard L402 flow with Lightning invoices.

Happy to adapt the flow if there's a specific L402 format the MCP server expects, or help document the integration in the README.