# Stax Merchant API

**Canonical:** https://apis.io/apis/stax/stax-merchant-api/  
**Provider:** Stax — https://apis.io/providers/stax/  
**Base URL:** https://apiprod.fattlabs.com  
**Documentation:** https://docs.staxpayments.com/reference/overview

Stax Merchant API is one of 23 APIs that [Stax](https://apis.io/providers/stax/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Merchants. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

The Merchant API from Stax — 7 operation(s) for merchant.

## Operations (11)

| Method | Path | Summary |
|---|---|---|
| POST | `/merchant/{id}/registration/file` | Add File to Merchant Registration |
| POST | `/merchant` | Create a Merchant |
| GET | `/merchant` | Get all Merchants |
| POST | `/merchant/{id}/apikey` | Create a New API Key for Merchant |
| GET | `/merchant/{id}/apikey` | List API Keys for Merchant |
| DELETE | `/merchant/{id}/registration/file/{file_id}` | Delete File from Merchant Registration |
| GET | `/merchant/{merchant_id}` | Get Merchant by ID |
| GET | `/merchant/{id}/registration` | Get Merchant Registration Data |
| PUT | `/merchant/{id}/registration` | Update Merchant Registration Data |
| POST | `/merchant/{merchant_id}/user/{user_id}` | **Link Existing User to Merchant |
| DELETE | `/merchant/{merchant_id}/user/{user_id}` | **Unlink User from Merchant |

## Machine-readable artifacts (8)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/openapi/stax-merchant-api-openapi.yml
- **Documentation** — https://docs.staxpayments.com/
- **APIReference** — https://docs.staxpayments.com/reference/overview
- **Examples** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/examples/stax-api-examples.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/data-model/stax-data-model.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/errors/stax-problem-types.yml
- **Webhooks** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/asyncapi/stax-webhooks.yml
- **AgenticAccess** — https://raw.githubusercontent.com/api-evangelist/stax/refs/heads/main/agentic-access/stax-agentic-access.yml

## Other Stax APIs (12)

- [Stax Admin API](https://apis.io/apis/stax/stax-admin-api/)
- [Stax Charge API](https://apis.io/apis/stax/stax-charge-api/)
- [Stax Credit API](https://apis.io/apis/stax/stax-credit-api/)
- [Stax Customer API](https://apis.io/apis/stax/stax-customer-api/)
- [Stax Ephemeral API](https://apis.io/apis/stax/stax-ephemeral-api/)
- [Stax File API](https://apis.io/apis/stax/stax-file-api/)
- [Stax File{id} API](https://apis.io/apis/stax/stax-file-id-api/)
- [Stax Forgot API](https://apis.io/apis/stax/stax-forgot-api/)
- [Stax Invoice API](https://apis.io/apis/stax/stax-invoice-api/)
- [Stax Item API](https://apis.io/apis/stax/stax-item-api/)
- [Stax Payment Method API](https://apis.io/apis/stax/stax-payment-method-api/)
- [Stax Query API](https://apis.io/apis/stax/stax-query-api/)

## Tags

Merchants

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