Zeller
Zeller is a Melbourne-founded Australian payments and business banking company (founded 2020 by former Square Australia executives Ben Pfisterer and Dominic Yap) that gives SMEs an integrated stack of card payment acceptance, a transaction account, a Mastercard debit card, and financial management tools in one place. As a merchant acquirer it processes in-person and online card payments (Visa, Mastercard, eftpos, American Express, JCB, Apple Pay, Google Wallet) across its Zeller Terminal hardware, Tap to Pay on mobile, and online checkout, positioning itself against Square and fellow ASX-adjacent acquirer Tyro. Zeller reached unicorn status on a 2022 Series B. Its API posture is developer-account-gated: the Zeller Developer Suite ships Payments SDKs (React, React Native, Windows .NET, Android, iOS) plus Terminal, Online, and Tap to Pay integration APIs, with reference documentation unlocked only after creating a free developer account. The developer portal authenticates through an Auth0 (OAuth2 / OpenID Connect) tenant; no OpenAPI specification is published for anonymous download.
Zeller is listed with 3 APIs on the APIs.io network. Tagged areas include Payments, Australia, Payment Gateway, Payment Processing, and Acquiring.
Zeller’s developer surface includes authentication, documentation, signup flow, pricing, engineering blog, support, and 14 more developer resources.
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| EMV Card Terminals (card acceptance hardware and kernels) | undeclared | - | - | - |
| Australia AFS, Credit and ADI Registers (ASIC + APRA licensing) | undeclared | - | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 2
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 3
Individual APIs this provider publishes, each with its own machine-readable definition.
Zeller Terminal API
Connect point-of-sale software directly to Zeller Terminal hardware to initiate and manage in-person card payments. Delivered through the Zeller Payments SDK (React, React Nativ...
Zeller Online Payments API
Accept payments inside web and mobile apps via Zeller's Online integration. Part of the Zeller Developer Suite; access to full API documentation is by request behind a free deve...
Zeller Tap to Pay API
Accept contactless card and mobile-wallet payments on a phone with no separate terminal, integrated through the Zeller Payments SDK. Documentation is gated behind a free Zeller ...
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Source (apis.yml)
Zeller API — frequently asked questions
Does Zeller have an API?
Yes. APIs.io lists 3 APIs from Zeller, including Zeller Terminal API, Zeller Online Payments API and Zeller Tap to Pay API.
How do I authenticate with the Zeller API?
Zeller documents its authentication (oauth2/openIdConnect · 1 scheme). The details are profiled on APIs.io as Zeller Authentication.
Does Zeller have an MCP server?
Yes. APIs.io lists 1 MCP server for Zeller: Remote MCP server at developer.myzeller.com over HTTP.
Is the Zeller API ready for AI agents?
Zeller has a Kin Score of 29.7 out of 100 (thin) and an Agent Readiness score of 15.1 (agent-aware), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.