# Upgrade Transactions API

**Canonical:** https://apis.io/apis/upgrade/upgrade-transactions-api/  
**Provider:** Upgrade — https://apis.io/providers/upgrade/  
**Base URL:** https://partner.upgrade.com/api/flexpay  
**Documentation:** https://docs.uplift.com/apidocs

Upgrade Transactions API is one of 3 APIs that [Upgrade](https://apis.io/providers/upgrade/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Transaction. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

Transactions API (Direct Settle disbursement)

## Operations (5)

| Method | Path | Summary |
|---|---|---|
| POST | `/v1/transactions` | Authorize Transaction |
| GET | `/v1/transactions/{transactionId}` | Get Transaction |
| POST | `/v1/transactions/{transactionId}/void` | Void Transaction |
| POST | `/v1/transactions/{transactionId}/capture` | Capture Transaction |
| POST | `/v1/transactions/{transactionId}/refund` | Refund Transaction |

## Machine-readable artifacts (2)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/upgrade/refs/heads/main/openapi/upgrade-transactions-api-openapi.yml
- **Documentation** — https://docs.uplift.com/apidocs

## Other Upgrade APIs (2)

- [Upgrade Marketing Offers API](https://apis.io/apis/upgrade/upgrade-marketing-offers-api/)
- [Upgrade Orders API](https://apis.io/apis/upgrade/upgrade-orders-api/)

## Tags

Transaction

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