Build eSIM into your app, agent, or LLM.

Quick example — create an order

Two HTTP calls and the buyer has a Stripe checkout URL. The eSIM QR arrives at their email within ~30 seconds of payment confirming.

# 1. Search the catalog for a Japan plan
curl -s "https://shop.worldcitisim.com/wp-json/esim/v1/plans" \
  | jq '.plans[] | select(.slug == "japan")'

# 2. Create an order — buyer gets a Stripe payment URL back
curl -sX POST "https://shop.worldcitisim.com/wp-json/esim/v1/orders" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "email": "buyer@example.com",
    "variation_id": 12345,
    "payment_method": "stripe",
    "metadata": { "agent_source": "my-integration" }
  }'

Pass payment_method: "btc" instead to get an on-chain Bitcoin address + sats amount + QR data URI in the response — no redirect, the buyer pays from any on-chain wallet.