Cancel payment

documented

Cancels (voids) a payment in APPROVED state.

POST /v2/payments/{payment_id}/cancelPaymentsno implementation yet0 runs

No implementation yet. Run it to have the agent write one, or open a pull request with your own.

Seed example (keychains curl)

npx -y keychains@latest curl "https://connect.squareup.com/v2/payments/{{$payment_id}}/cancel" \
  -X POST \
  -H "Square-Version: 2026-01-22" \
  -H "Authorization: Bearer {{OAUTH2_ACCESS_TOKEN}}" \
  -H "Content-Type: application/json"