# Sezzle

**Canonical:** https://apis.io/providers/sezzle/  
**Website:** https://docs.sezzle.com/  
**APIs profiled:** 8

Sezzle is a buy-now-pay-later platform that enables merchants to offer installment payment options at checkout. Its REST APIs support merchant checkout integration, order management, shopper authentication, customer tokenization, and payment installment processing — allowing shoppers to split purchases into four interest-free payments over six weeks.

## Kin Score — 37.1 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 37.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 56.9 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Payments**: 42.2 (matched via tags).

## Agent readiness — 24.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (8)

- **Sezzle API v1** — The legacy Sezzle v1 API for merchants. Supports checkout creation and order completion via redirect-based flow. Deprecated in favor of v2; existing integrations are encouraged ...
- **Sezzle Bearer Authentication API** — The Bearer Authentication API from Sezzle — 1 operation(s) for bearer authentication.
- **Sezzle Customer API** — The Customer API from Sezzle — 4 operation(s) for customer.
- **Sezzle Order API** — The Order API from Sezzle — 7 operation(s) for order.
- **Sezzle Reports API** — The Reports API from Sezzle — 4 operation(s) for reports.
- **Sezzle Session API** — The Session API from Sezzle — 2 operation(s) for session.
- **Sezzle Token API** — The Token API from Sezzle — 2 operation(s) for token.
- **Sezzle Webhooks API** — The Webhooks API from Sezzle — 3 operation(s) for webhooks.

## Agentic access (1)

- **Sezzle Agentic Access** — 27 operations · 15 acting

## Security (3)

- **Sezzle Authentication** — apiKey · 1 scheme
- **Sezzle Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sezzle Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Plans**

## Tags

Buy Now Pay Later, BNPL, Payments, Installments, Fintech, Merchant Integration, Checkout

---

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