# Stone

**Canonical:** https://apis.io/providers/stone/  
**Website:** https://www.stone.com.br  
**APIs profiled:** 4

Stone is a Brazilian financial technology company offering REST APIs for payment processing, Pix instant payments, digital banking accounts, boleto issuance, credit products, payment links, and stone-terminal management for merchants. Their platform enables businesses to authorize, capture, cancel, and query transactions across online and physical sales channels.

## Kin Score — 19.9 / 100 (emerging)

Scored 2026-08-19 under rubric 0.12.0. Trend: flat (-3.4 from 23.3).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 7.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Payments**: 17.2 (matched via tags).

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| 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 |

## Access

Free · Requires approval — onboarding: approval, pricing: free, trial: no (confidence: medium).

## APIs (4)

- **Stone Online API** — The Stone Online transactional API for authorizing, capturing, canceling, and querying payment transactions for online and physical sales platforms. Supports credit card, debit,...
- **Stone OpenBank API** — Stone's open banking REST API providing digital account management, internal and external transfers, Pix instant payments, boleto issuance, payment links, QR code generation, co...
- **Stone Connect API** — API for connecting point-of-sale systems to Stone payment terminals (maquininhas), enabling merchants to integrate physical payment acceptance into their business software.
- **Stone Conciliation API** — Backoffice API for monitoring sales, installments, cancellations, and financial reconciliation data for Stone merchants.

## Security (1)

- **Stone Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Stone Plans Pricing**

## Tags

Payments, Fintech, Pix, Brazil, Digital Banking, Payment Processing, Boleto, Financial Technology

---

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