# Cielo Refunds API

**Canonical:** https://apis.io/apis/cielo/cielo-refunds-api/  
**Provider:** Cielo — https://apis.io/providers/cielo/  
**Base URL:** https://api-internet.cielo.com.br  
**Documentation:** https://developercielo.github.io/manual/api-refunds

Cielo Refunds API is one of 13 APIs that [Cielo](https://apis.io/providers/cielo/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Refunds, Cancellations, Authentication, and mTLS. The published artifact set on APIs.io includes API documentation.

The Cielo Refunds API processes single and batch refund requests against captured transactions. Authentication is OAuth 2.0 Client Credentials issued against a Keycloak realm (MulesoftPRD / MulesoftHML) with 5-minute tokens and mandatory mTLS in production. Endpoints under /cielo-refunds-exp-external/refunds/v1 support POST /refunds, query by refundID and merchantID, paginated listings, and PDF/ZIP letter generation for documentation.

## Machine-readable artifacts (2)

- **Documentation** — https://developercielo.github.io/manual/api-refunds
- **Sandbox** — https://apihml-internet.cielo.com.br/refunds-api/v1

## Other Cielo APIs (12)

- [Cielo E-commerce API](https://apis.io/apis/cielo/cielo-ecommerce-api/)
- [Cielo 3DS 2.2 Authentication API](https://apis.io/apis/cielo/cielo-3ds-api/)
- [Cielo Pix API](https://apis.io/apis/cielo/cielo-pix-api/)
- [Cielo Payment Link API](https://apis.io/apis/cielo/cielo-payment-link-api/)
- [Cielo Checkout API](https://apis.io/apis/cielo/cielo-checkout-api/)
- [Cielo Chargeback API](https://apis.io/apis/cielo/cielo-chargeback-api/)
- [Cielo Conciliador API](https://apis.io/apis/cielo/cielo-conciliador-api/)
- [Cielo Promo API](https://apis.io/apis/cielo/cielo-promo-api/)
- [Cielo LIO Remote Integration API](https://apis.io/apis/cielo/cielo-lio-remote-api/)
- [Cielo BIN Query API](https://apis.io/apis/cielo/cielo-bin-query-api/)
- [Cielo E-Wallets API](https://apis.io/apis/cielo/cielo-e-wallets-api/)
- [Cielo Tap on Phone](https://apis.io/apis/cielo/cielo-tap-on-phone/)

## Tags

Refunds, Cancellations, Authentication, mTLS

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cielo/cielo-refunds-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cielo/.