> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.mercoa.com/embedded-ap-ar/api-reference/webhooks/counterparty-onboarding-completed/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.mercoa.com/_mcp/server.

# Counterparty Onboarding Completed

POST 

A payee-payor relationship was updated

Reference: https://docs.mercoa.com/embedded-ap-ar/api-reference/webhooks/counterparty-onboarding-completed

## Request

### Payload

- `eventType` (string, required) — The type of the event.
- `entityId` (string, required) — The ID of the entity that owns the counterparty relationship
- `counterpartyId` (string, required) — The ID of the counterparty