Give your agent a render tool.
It signs itself up.

curl -sS https://api.galleyrender.com/v1/render \
  -H "Authorization: Bearer $GALLEY_API_KEY" \
  -H 'content-type: application/json' \
  -d '{
    "template": "invoice@1",
    "format": "pdf",
    "data": {
      "invoice_number": "INV-1042",
      "issued_on": "2026-09-16",
      "seller": { "name": "Galley Render" },
      "buyer":  { "name": "Acme Robotics" },
      "line_items": [
        { "description": "Starter plan, September", "quantity": 1, "unit_price": 19 }
      ]
    }
  }'

Small jobs finish inside the request and come back 200 with a URL. See POST /v1/render.

// Node 22+. No dependencies.
const res = await fetch("https://api.galleyrender.com/v1/render", {
  method: "POST",
  headers: {
    authorization: `Bearer ${process.env.GALLEY_API_KEY}`,
    "content-type": "application/json",
  },
  body: JSON.stringify({
    template: "invoice@1",
    format: "pdf",
    data: {
      invoice_number: "INV-1042",
      issued_on: "2026-09-16",
      seller: { name: "Galley Render" },
      buyer: { name: "Acme Robotics" },
      line_items: [{ description: "Starter plan", quantity: 1, unit_price: 19 }],
    },
  }),
});

const render = await res.json();
if (!res.ok) throw new Error(render.error.message);

console.log(render.url);        // signed, expires in an hour
console.log(render.page_count); // 1
console.log(render.cached);     // false the first time, true after

You don't need an SDK, but there is one: galley-render on npm and PyPI.

# Python 3.9+. Standard library only.
import json, os, urllib.request

body = json.dumps({
    "template": "invoice@1",
    "format": "pdf",
    "data": {
        "invoice_number": "INV-1042",
        "issued_on": "2026-09-16",
        "seller": {"name": "Galley Render"},
        "buyer": {"name": "Acme Robotics"},
        "line_items": [{"description": "Starter plan", "quantity": 1, "unit_price": 19}],
    },
}).encode()

req = urllib.request.Request(
    "https://api.galleyrender.com/v1/render",
    data=body,
    headers={
        "Authorization": f"Bearer {os.environ['GALLEY_API_KEY']}",
        "Content-Type": "application/json",
    },
)

render = json.load(urllib.request.urlopen(req))
print(render["url"], render["page_count"], render["cached"])

Swap urllib for requests or httpx if you already have one.