> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://amer.developers.trustly.com/api-reference/api/customers/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://amer.developers.trustly.com/_mcp/server.

# Customers


## API Docs

- Customers [Create or Update a Customer](https://amer.developers.trustly.com/api-reference/api/customers/post-customers.md)
- Customers [Get Customer by ID](https://amer.developers.trustly.com/api-reference/api/customers/get-customers-customer-id.md)
- Customers [Get Customers](https://amer.developers.trustly.com/api-reference/api/customers/get-customers.md)
- Customers [Update Customer by ID](https://amer.developers.trustly.com/api-reference/api/customers/post-customers-customer-id.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://amer.developers.trustly.com/openapi.json)
- [OpenAPI YAML](https://amer.developers.trustly.com/openapi.yaml)