Onsi

Onsi is a global technology provider and UK/EU insurance intermediary that delivers flexible, shift-linked worker benefits — on-demand ("Embedded") pay, insurance cover, and a rewards marketplace — to employers and their frontline workers. Its Partner (BMO) API lets benefit-program partners manage members (invite, read, update, replace, and offboard individually, in batches, or via full-list CSV jobs), read tiers and earned-wage balances, run on-demand pay withdrawals through a two-step intent/complete flow, and reconcile pay cycles and deductions with payroll. Authentication is an x-api-key header; requests support idempotency (x-idempotency-key, 7-day retention) and skip/take offset pagination, with a consistent code/message error envelope.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

How we profile Onsi

Each block below is one kind of artifact we hold for Onsi. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 2

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Onsi members API

The members API from Onsi — 7 operation(s) for members.

Onsi pay API

The pay API from Onsi — 9 operation(s) for pay.

MCP Servers 1

Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.

Model Context Protocol servers that expose these APIs to AI agents.

onsi-mcp.yml

MCP SERVER

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Onsi Rate Limits

0 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Onsi Authentication

apiKey · 1 scheme

SECURITY

Onsi Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Onsi Agentic Access

20 operations · 10 acting

20 operations · 10 acting

AGENTIC

Resources

Every other property we hold for Onsi — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

← All providers · Data indexed from github.com/api-evangelist/onsi · machine-readable index on apis.io