Example Integrations - StellarX402

All examples live in github.com/stellar/x402-stellar/examples and are runnable with a single command.

Buyer-side

Example	What it shows
`examples/buyer-fetch`	Minimal `fetchWithPayment` against the buyer quickstart.
`examples/buyer-discover`	Full Bazaar search + pay flow.
`examples/buyer-agent-mcp`	An MCP-speaking agent that discovers and calls paid tools.
`examples/buyer-budgeted`	Smart-account budget layered on top.

Seller-side

Example	What it shows
`examples/seller-express`	One-route Express server with `requirePayment`.
`examples/seller-fastapi`	Same, in FastAPI.
`examples/seller-next-app`	Next.js app-router route handler.
`examples/seller-upto-llm`	Metered pricing for an LLM completion endpoint.

Operator-side

Example	What it shows
`examples/operator-docker-compose`	Facilitator + Postgres + Grafana in one compose file.
`examples/operator-k8s`	Kubernetes manifests with sponsor-balance alert.

Running an example

git clone https://github.com/stellar/x402-stellar
cd x402-stellar/examples/buyer-fetch
cp .env.example .env   # fill in your Testnet keypair
npm install && npm start

Each example’s README lists what environment variables it needs.