# Billieio

**Canonical:** https://apis.io/providers/billieio/  
**Website:** https://www.billie.io  
**APIs profiled:** 1

Billie is a fintech platform that provides B2B payment solutions, enabling businesses to buy now and pay later, invoice financing, and flexible checkout options. It serves over 1.3 million buyers and 9,000 merchants across Europe, processing billions in transaction volume. The service includes integration via APIs for order creation, payment processing, and refunds, with support for multiple payment methods and partner integrations.

## Kin Score — 39.5 / 100 (developing)

Scored 2026-10-23 under rubric 0.25.0. Trend: flat (+0.0 from 39.5).

| Facet | Score |
|---|---|
| Discoverability | 51.8 |
| Contract Quality | 67.9 |
| Contract Governance | 22.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 33.3 |
| Access Clarity | 0.0 |

Regulatory layer — **Payments**: 29.5 (matched via tags).

## Agent readiness — 39.0 (agent-ready)

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

## APIs (6)

- **Billie API** — API reference for Billie payment integration
- **Billieio Authentication API** — This API uses OAuth 2.0 for secure authentication. Different keys are used for the `sandbox` and `production` environments. Both systems operate completely independent, however ...
- **Billieio Back-end Order Creation API** — The Back-end Order Creation API from Billieio — 2 operation(s) for back-end order creation.
- **Billieio Captures API** — The Captures API from Billieio — 5 operation(s) for captures.
- **Billieio Front-end Order Creation API** — ## To integrate the Billie checkout widget, the following steps are required: 1. Add the Billie checkout widget bundle to your checkout page 2. Provide config data _(with the `s...
- **Billieio Order Management API** — The Order Management API from Billieio — 2 operation(s) for order management.

## Agentic access (1)

- **Billieio Agentic Access** — 18 operations · 13 acting · 1 human-in-the-loop

## Security (3)

- **Billieio Authentication** — 1 scheme
- **Billieio Domain Security** — TLSv1.2 · HSTS · DMARC
- **Billieio Vulnerability Disclosure** — security.txt · contact published

## Tags

Fintech, Payments, B2B, Europe

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