Next up in the profile-and-onboard video series on apis.io is 15Five, the AI-powered continuous performance management platform used by some 3,000 organizations for check-ins, OKRs, 1-on-1s, pulse surveys, and manager effectiveness.
Starting from the 15Five provider page on apis.io, I click out into the live site to walk what they’re all about.
An AI-forward HR platform
The homepage leads with AI-powered performance management built for business impact, and the product line backs it up: Kona, an AI coach and meeting assistant; Maya, an insights dashboard positioned as an AI thought partner for people insights; a manager enablement platform; Perform for performance management; Engage for data-driven employee engagement; and a compensation product that connects pay to performance data.
The rest of the surface is what you’d expect from a mature B2B SaaS company — a genuinely robust integrations page, solutions by team, customer stories, a content library with a podcast and events, an active blog (the most recent post landed June 29th), and a help center. Pricing is public and per-user: $4 for Engage, $11 for Perform, $16 for the total platform. They sell into SaaS, business services, finance and banking, real estate, and healthcare, and publish comparison pages against Lattice, Culture Amp, and HRIS platforms.
One Public API, HTTP Basic, 5 requests a second
The developer story is a single 15Five Public API — a RESTful surface for reading and modifying account data: users, groups, objectives (OKRs), check-ins, review cycles, and performance data. Authentication is an API key over HTTP Basic Auth, requests are rate-limited to 5 per second per IP, and the documentation ships with a downloadable OpenAPI spec.
The apis.io catalog around it includes a JSON-LD context (18 classes), a conceptual GraphQL schema derived from the REST surface, plans, rate limits, a FinOps profile, and a status page — plus the open APIs.json index on GitHub.
Where they land
15Five currently sits in the thin band on apis.io, and the facets explain why: discoverability is excellent — the API is easy to find and the docs are public — but there’s no published governance surface, and the contract and ergonomics scores reflect an API that is a customer feature rather than a developer platform. That reading gets sharper in the onboarding video.
Next: onboarding
The companion video tries to do what I always do — sign up cold and get to a hello-world call — and runs straight into the defining fact of this API: there is no self-serve signup. The full story is in Onboarding with 15Five — When the API Key Sits Behind a Demo.
Walk the surface yourself on the 15Five provider page, and catch the rest of the series on YouTube @APISearch.