Human Resources & Payroll indexes 867 providers publishing 4,164 APIs on the network — hiring, onboarding, payroll, benefits, performance and the compliance obligations wrapped around all of it.
Almost every API in this vertical moves data that is regulated somewhere: salary, immigration status, health elections, performance records, national identifiers.
The cohort
| Provider | APIs | Band | Score |
|---|---|---|---|
| 65 | exemplar | 70.2 | |
| Workday | 50 | exemplar | 70.2 |
| Affinda | 16 | exemplar | 69.3 |
| Remote | 101 | strong | 62.0 |
| Ashby | 53 | developing | 55.0 |
LinkedIn and Workday tie at exactly 70.2, from opposite directions — one a consumer-scale professional network, the other the enterprise system of record. Both land on the same number.
Remote publishes the biggest surface
101 APIs, the largest in the cohort, at 62.0.
Employment-of-record is a genuinely hard API problem, and the size of the surface reflects it. Hiring someone in Portugal, Brazil and Japan means three different employment contracts, three tax regimes, three benefits models, three termination rule sets and three sets of statutory filings. Every one of those has to be exposed as an operation if the platform is going to be programmable.
Remote also appears in Legal & Compliance Tech, covered yesterday, which is correct rather than duplicative — cross-border employment is a compliance product that happens to pay people.
Ashby is the honest entry
53 APIs at 55.0, a developing band, and it is the most useful data point in the cohort.
Ashby is a modern, well-regarded ATS with a substantial published surface. Fifty-three APIs is not a small commitment. The score says the description has not kept pace with the surface — which is the single most common finding in the entire catalog and the cheapest one to fix.
A developing band at 53 APIs is not a company that neglected its API. It is a company that built one and has not yet invested the quarter of work that turns a working surface into a well-described one.
What has shifted
Document extraction became an HR primitive. Affinda at 69.3 parses résumés, contracts and identity documents. Hiring runs on unstructured documents that have to become structured records, and that conversion is now an API call rather than a data-entry role.
The systems of record opened up. Workday publishing 50 indexed APIs — plus a separate Workday Extend surface — is a meaningful change from the era when enterprise HCM meant a nightly SFTP drop of a fixed-width file.
Nobody publishes consent infrastructure. For a vertical this heavily regulated, the absence is notable. These are APIs moving salary and immigration data, and the catalog shows the same near-zero human-in-the-loop and consent-identity coverage found everywhere else. The regulation is on the data; the machine-readable governance is not on the contract.
Where to start
Browse the vertical at apis.io/industries/human-capital-management/. Related verticals: Legal & Compliance Tech, Education & EdTech, Digital Health & Telehealth, and Artificial Intelligence.
Takeaway
4,164 APIs across 867 providers, with LinkedIn and Workday tied at 70.2 and the largest surface belonging to a cross-border employment platform. It is a vertical where nearly every payload is regulated and almost nobody publishes the consent machinery to match.
Browse it at apis.io/industries/human-capital-management/.