Quickstart

1. Get an API key

Sign up at untangledapi.com, confirm your email, and you'll land on the dashboard. Click Create key on /dashboard/keys. Copy the raw key — it's shown once and never again. Anything starting with sk_live_ belongs in your server's environment, never in client code.

2. Set the environment variable

export UNTANGLED_KEY=sk_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

3. Make your first call

The most common shape — extracting structured data from an invoice — is one POST:

curl https://api.untangledapi.com/v1/extract/invoice \
  -H "x-api-key: $UNTANGLED_KEY" \
  -H "content-type: application/json" \
  -d '{
    "document": {
      "text": "Acme Co. — Invoice #1042 — Total: $1,250.00 — Due: 2026-05-15"
    }
  }'

Response:

{
  "vendor": "Acme Co.",
  "invoice_number": "1042",
  "total": 1250.00,
  "currency": "USD",
  "due_date": "2026-05-15"
}

4. What's next

• Read the Authentication page if you want to understand key scoping and rotation.
• Read Models to understand HEU and how billing works.
• Pick a prebuilt schema from Extract, or define your own with Custom.
• If you're processing more than ~50 documents a minute, look at Batch before doing it serially.