# Paystone

**Canonical:** https://apis.io/providers/paystone/  
**Website:** https://www.paystone.com/  
**APIs profiled:** 1

Paystone is a Canadian payment processing and customer-engagement company headquartered in London, Ontario, positioning itself as one of the country's largest bank-independent payment processors. It sells card-present terminals, online checkout and hosted payment pages, virtual terminals, invoicing, and recurring billing to Canadian small and mid-sized businesses, and layers loyalty, gift-card, and reputation-marketing products on top of the payment rails. Paystone owns DataCandy, a long-standing Canadian gift-card and loyalty platform, and it is DataCandy that carries Paystone's public, self-serve, documented API surface: a live API Platform (Hydra/JSON-LD) REST API at api.paystone.com covering merchants, clients, contacts, gift/loyalty/ prepaid/promo account types, transactions, member and balance portals, and webhooks, authenticated with JWT bearer tokens and documented through an interactive Swagger UI. Paystone's core card-acquiring and payment-gateway processing is delivered as a merchant product rather than a publicly self-serve developer API, so the honest developer story here is the DataCandy gift-and-loyalty platform API, not a public payments/acquiring API.

## Kin Score — 46.7 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 46.7).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 65.7 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 44.7 |
| Access Clarity | 44.7 |

Regulatory layer — **Payments**: 39.1 (matched via tags).

## Agent readiness — 41.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | derived |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (1)

- **Paystone DataCandy API** — The public, documented REST API for Paystone's DataCandy gift-card and loyalty platform, built on API Platform (Hydra/JSON-LD) and served from api.paystone.com. It exposes 28 do...

## MCP servers (1)

- **Paystone MCP Server**

## Agentic access (1)

- **Paystone Agentic Access** — 38 operations · 11 acting

## Security (2)

- **Paystone Authentication** — http · 1 scheme
- **Paystone Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Payments, Canada, Payment Processing, Acquiring, Gift Cards, Loyalty, Subscription, Billing, Merchant Services

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/paystone/). Scores are computed from the provider's own public artifacts under a published rubric.