# How to Connect Other Apps With Unleashed API Access, and the API Limits

> Find your Unleashed API ID and Key, see the headers each request needs, and learn the monthly API call limits per plan and what happens when you hit them.

- URL: https://logistify.ai/guides/unleashed/api-access-limits/
- Section: Unleashed Guides, Xero, QuickBooks Online & ecommerce
- Applies to: Unleashed Lite, Core, Pro
- Steps checked against: Unleashed Help Centre articles, checked 23 October 2026
- Updated: 2026-10-23

**Short answer:** To connect another app with Unleashed API access, the Account Owner goes to Integration > Unleashed API Access and copies the API ID and Key. Each request needs five headers, including a signature generated per request. Monthly calls are capped by plan: 250,000 on Core and 500,000 on Pro. At 100%, all API requests are blocked until the limit resets on the 1st of the month at 12:00 AM UTC.

## Before you start

- Only the Account Owner can see the API credentials.
- The API ID and Key are unique to each account, including each Sandbox account, and can't be changed or refreshed.
- Unleashed can't block an app once you've shared the credentials. Share them only with people and platforms you trust.
- Build and test against a Sandbox account, so development doesn't touch live data.
- Unleashed Support helps with how the product works, but doesn't write, review or debug API code.

## Step 1: Find your API ID and Key

1. Log in to Unleashed as the Account Owner.
2. Go to Integration > Unleashed API Access.
3. View and copy your API ID and Key.

## Step 2: Send the five required headers

1. Content-Type: application/xml or application/json.
2. Accept: application/xml or application/json.
3. api-auth-id: your API ID.
4. api-auth-signature: a signature generated for each request from the exact method, URL path and query string.
5. client-type: where the call comes from, in the format partner_name/app_name or account_name/app_name.

## Step 3: Know your monthly limit

| Plan | API calls included per month | Extra API bundle |
| --- | --- | --- |
| Lite | 125,000 (US pricing page) | Not listed |
| Core | 250,000 | +250,000 for £119 GBP, $159 AUD, $159 NZD or $159 USD a month |
| Pro | 500,000 | +500,000 for £179 GBP, $239 AUD, $239 NZD or $239 USD a month |

*From Unleashed's help article and its UK, Australian, New Zealand and US pricing pages, checked October 23, 2026. Prices exclude tax. Lite appears only on the US pricing page; the UK, Australian and New Zealand pages list Core and Pro.*

- The limit resets on the 1st of each calendar month at 12:00 AM UTC (11:00 AM AEDT, 1:00 PM NZST, 12:00 AM GMT).
- Unleashed emails you at 90%, 95% and 100% of the limit.
- At 90% and 95%, everything keeps working.
- At 100%, all API requests are blocked until the reset. Third-party integrations stop syncing and automated processes stop.
- Calls from apps that use your API ID and Key count toward the limit.
- Webhook events sent by Unleashed don't count.
- Native integrations don't count: CRM, Mintsoft, Xero, QuickBooks, Lightspeed and the eCommerce Hub's Shopify, Amazon and WooCommerce.

## Step 4: Watch usage and add capacity

1. On the Unleashed API Access page, check the bar chart of calls per month for the last 12 months.
2. If a 90% or 95% warning arrives in the first 14 days of a month, ask your integration providers to look into it. Give them your list of active integrations, any 3PL shipping providers, and recent changes.
3. If a 90% warning arrives with fewer than 3 days left, Unleashed says no action is usually needed.
4. To add calls, go to Settings > Billing, select Modify next to Products, select Add on the Extra API Bundle tile, review and select Update, accept the Terms & Conditions, and click Upgrade.

## If something doesn't look right

- 403 error: the auth signature is wrong. Regenerate it for that exact URL and query string, and check the ID and Key belong to the same account.
- 500 Internal Server Error: usually a formatting problem. Check headers, query parameters, pagination values and mandatory fields in the payload.
- Partial updates that blank out required fields cause errors. Send complete values.

## Where Unleashed leaves the work to you

- Finding out which app used your calls. Unleashed doesn't keep a log of API connections, so you have to ask each provider.
- Planning around the hard stop. Only one extra API bundle can be added. Past that, calls stay blocked until the reset.
- Building and fixing custom integrations. That needs a developer who knows REST APIs.
- Removing the extra bundle. It renews with your subscription unless the Account Owner asks for it to be removed.

## Where Logistify fits

Logistify is a managed service, not a connector or app, so this guide isn't about it. Its [Sales Order Service](https://logistify.ai/agents/sales-order/) enters customer orders into Unleashed as sales orders and creates sales quotes. If you're looking at AI assistants with Unleashed, see [How to use ChatGPT or Claude with Unleashed](https://logistify.ai/guides/unleashed/use-chatgpt-claude-with-unleashed/). For what a native connection covers, see [How to connect Shopify to Unleashed](https://logistify.ai/guides/unleashed/connect-shopify-import-missing-orders/).

## Frequently Asked Questions

### Where do I find my Unleashed API key?

The Account Owner finds the API ID and Key under Integration > Unleashed API Access. Other users can't see them.

### How many API calls does Unleashed allow?

250,000 a month on Core and 500,000 on Pro. Unleashed's US pricing page lists 125,000 on Lite.

### What happens when I reach the Unleashed API limit?

All API requests are blocked until the limit resets on the 1st of the month at 12:00 AM UTC, unless you add an Extra API Bundle.

### Do the Xero and Shopify integrations use my API calls?

No. Native integrations, including Xero, QuickBooks and the eCommerce Hub's Shopify, Amazon and WooCommerce, are exempt.

### Can I change or refresh my Unleashed API key?

No. The API ID and Key can't be changed or refreshed, so share them carefully.

### Will Unleashed Support debug my API code?

No. Support answers product questions but doesn't write, review or debug code.

## Sources

- [Unleashed: Unleashed API Access](https://help-unleashed.theaccessgroup.com/en/articles/11582293-unleashed-api-access)
- [Unleashed: Understanding your API usage limits](https://help-unleashed.theaccessgroup.com/en/articles/11582291-understanding-your-api-usage-limits)
- [Unleashed: Pricing (UK), checked 23 October 2026](https://www.unleashedsoftware.com/en-gb/pricing/)
- [Unleashed: Pricing (AU), checked 23 October 2026](https://www.unleashedsoftware.com/en-au/pricing/)
- [Unleashed: Pricing (NZ), checked 23 October 2026](https://www.unleashedsoftware.com/en-nz/pricing/)
- [Unleashed: Pricing (US), checked 23 October 2026](https://www.unleashedsoftware.com/en-us/pricing/)