topup for ChatGPT

app.iomarkets/topup

Travel eSIMs in 200+ destinations and top-ups in 150+ countries, paid in USDC via x402

client:ChatGPT transport:streamable-http tools:9

Install topup in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://iomarkets.app/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs