ERP & accounting
Sage 300 CRE API and integration guide
Sage 300 Construction and Real Estate (formerly Timberline) runs on the contractor's own server. Integrations use an on-premises Web API licensed through Sage's development partner program, or ODBC reads.
Last verified October 2026 against the sources below. Confirm details with Sage before you build.
At a glance
- Category
- ERP & accounting · Sage
- API style
- On-premises REST/JSON Web API installed on the customer's accounting server, plus ODBC reads through the Timberline Data driver.
- Authentication
- Web API: every request carries an X-DPPKey header (the Sage Development Partner Program license key); you authenticate with the user's Windows credentials and send the returned token in an X-Credentials header. ODBC: a DSN plus a Sage user.
- Sandbox / developer program
- No public sandbox. Developers join the Sage CRE Development Partner Program, which issues a time-limited key renewed with the agreement. Confirm current terms with Sage.
- Webhooks / events
- None documented in the Web API user guide.
- Rate limits
- Not published. Confirm with vendor.
- Exports and files
- ODBC reads of accounting data for reporting. The Web API guide lists no AP vendor, AP invoice or commitment endpoints, so those usually come through ODBC or Sage's desktop tooling. Confirm with vendor for your version.
- Marketplace / partner program
- Sage CRE Development Partner Program (apply by email; program fees apply).
Key objects for construction workflows
- Jobs
- Cost codes and categories
- Job cost transactions
- Equipment
- Payroll employees
- Timesheets
- Field reports
- RFIs
- Job contacts
Notes and gotchas
- There is no cloud endpoint: the integration has to reach the customer's server, and Sage notes your application should manage the correct URL for each customer's implementation.
- Each endpoint needs the matching partner-program license feature and the customer's own module licenses and user permissions.
- The partner key is time-limited and reissued when the partner agreement renews; put the renewal on someone's calendar.
Sources
Frequently asked questions
Does Sage 300 CRE have a cloud API?
Not in the sense of a hosted endpoint. Sage's Web API runs on the customer's own accounting server, so an integration has to reach that server, typically over a VPN or a gateway.
Can I read AP invoices and commitments through the Sage 300 CRE Web API?
The v25 Web API guide covers job cost, equipment, payroll time, field reports and RFIs, but lists no AP vendor, invoice or commitment endpoints. Teams usually read those through the ODBC driver. Confirm with Sage for your version.
Do I need to be a Sage partner to use the API?
The Web API requires a Development Partner Program key on every request. Sage describes a customer track for internal use as well as the partner track; check current terms with Sage.
Next step
Connecting Sage 300 CRE to your other systems?
Bring the systems and the report or workflow you want to fix. We'll walk through what moves, who owns each record, and what to check first.