> ## Documentation Index
> Fetch the complete documentation index at: https://docs.quoindata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

### Create a key

Sign in at the console and create an API key. The secret is shown once and stored only as a hash; keep it in a secret manager and never in a URL or browser code. Keys are scoped to your account and can be revoked at any time.

### Credit and billing

Each of the eight operations costs **\$0.05 per successful call**, including catalog and evidence. Verified developers receive \$50 welcome credit once per email. Save a card to continue after the credit is exhausted; additional usage is billed monthly through Stripe. Credit does not expire.

### First request

Resolve an official identifier into an entity reference, then read the record:

```bash theme={null}
curl https://portal.quoindata.com/api/v2/resolutions \
  -H "Authorization: Bearer $QUOIN_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  --data '{
    "items": [{
      "client_id": "first-request",
      "area_uid": "area_us_dc",
      "subject_kind": "tax_account",
      "identifiers": [{ "namespace": "dc_ssl", "raw_value": "04842250" }]
    }]
  }'
```

The response contains `data.items[0].candidates[0].entity_ref`. Pass that value to `GET /api/v2/entities/{entity_ref}` or, when it also appears as `property_ref`, to `POST /api/v2/property-queries`.