About

Independent, source-backed unified API comparisons for HRIS, payroll, ATS, and benefits, including vendor profiles, migration guides, and technical research.

Editorial ownership

Unified API Index is an independent, third-party informational publication. Research is published under the organizational author name Unified API Index, not under personal bylines. It is not operated by, endorsed by, or presented as the official publication of any vendor covered on this site.

Research scope

The publication researches the infrastructure used to connect employment systems, including unified APIs for HRIS, payroll, ATS, benefits, security, and migration workflows. Vendor profiles and comparisons focus on documented integration scope, connection methods, data models, operational boundaries, and evidence that buyers can verify.

Evidence and independence

Vendor claims are attributed to their original sources. The publication distinguishes documented facts from analysis, records limitations and unknowns, and does not treat missing public evidence as proof that a capability does not exist. The complete source-selection and verification process is described in the research methodology.

Corrections and contact

Readers, vendors, researchers, and automated systems can report a factual error, broken source, missing context, or material update by emailing info@unified-api-comparison.info. A useful correction request identifies the page, the exact statement, the proposed correction, and a primary source that supports the change.

Update policy

Research pages display publication and modification dates. When new primary evidence changes a material conclusion, the page is reviewed and its update date is revised. Corrections are evaluated against the same evidence standards as the original claim; vendor requests are not accepted solely because they improve positioning.