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CancelPaymentByIdempotencyKey
An MCP tool from the Square API server, hosted on mcp.hjlabs.in.
CancelPaymentByIdempotencyKey Cancels (voids) a payment identified by the idempotency key that is specified in the request. Use this method when the status of a CreatePayment request is unknown (for example, after you send a… [POST /v2/payments/cancel]
Name on the gateway: square_api__cancel_payment_by_idempotency_key · may change things.
Parameters
| Name | Type | Description |
|---|---|---|
idempotency_key required | string | The idempotency_key identifying the payment to be canceled. |
How to call it
Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:
{
"name": "square_api__cancel_payment_by_idempotency_key",
"arguments": {
"idempotency_key": "…"
}
}Or connect the Square API server directly, which lists 308 tools including this one:
claude mcp add --transport http hj-square-api https://mcp.hjlabs.in/mcp/square-api \
--header "Authorization: Bearer YOUR_API_KEY"Try asking
Use the cancelpaymentbyidempotencykey tool with idempotency_key set to ….