API: pay in your currency, Activity Search and better market-size figures
- Ian Makgill
- Release notes
- 12 Nov, 2026
- 01 Min read
Changes to the Open Opportunities API and its developer portal.
Prepaid credit in your currency
The developer portal sells API access as prepaid credit. Choose your organisation's billing currency when you sign up; it is fixed after your first payment. Buy credit by card at any time, or buy a Growth or Enterprise package for 12 months of lower rates. Requests stop when your credit cannot cover them, so there are no overage charges. API plans and pricing lists the rates.
You sign in to the portal with a one-time code sent to your work email.
Activity Search through the API
Activity Search calls and the records they return are priced in every plan, alongside keyword search, aggregate calls and attachment downloads. The documentation now covers Activity Search and the market-size endpoint.
Market-size figures
The market-size endpoint now:
- removes duplicate notices when you ask it to, so counts and totals do not count one procurement twice;
- applies the maximum value filter;
- matches a whole CPV family when you give a short code, as the search endpoint does;
- adds up the values of award notices.
Other changes
- A
source__isfilter limits a search to named sources. - Attachment downloads return the original file name, and attachment lists work for notice IDs that contain a slash.