Enable internal API key Auth by changing config/development.toml
[internal_merchant_id_profile_id_auth]
enabled = true
internal_api_key = "test_internal_api_key"

curl --location 'http://localhost:8080/account/merchant_1759125756/business_profile/pro_71jcERFiZERp44d8fuSJ' \
--header 'Content-Type: application/json' \
--header 'api-key: dev_0RJW0cwZDeGfSkod0eJWOkfZHK0PCoZtDYJJ1FxeHqhHky1VNPU6nkgFQiTFSDvA' \
--data '{
  "billing_processor_id": "mca_NLnCEvS2DfuHWHFVa09o"
}'

{"merchant_id":"merchant_1759125756","profile_id":"pro_71jcERFiZERp44d8fuSJ","profile_name":"US_default","return_url":"https://google.com/success","enable_payment_response_hash":true,"payment_response_hash_key":"ZFjTKSE1EYiXaPcRhacrwlNh4wieUorlmP7r2uSHI8fyHigGmNCKY2hqVtzAq51m","redirect_to_merchant_with_http_post":false,"webhook_details":{"webhook_version":"1.0.1","webhook_username":"ekart_retail","webhook_password":"password_ekart@123","webhook_url":null,"payment_created_enabled":true,"payment_succeeded_enabled":true,"payment_failed_enabled":true,"payment_statuses_enabled":null,"refund_statuses_enabled":null,"payout_statuses_enabled":null},"metadata":null,"routing_algorithm":null,"intent_fulfillment_time":900,"frm_routing_algorithm":null,"payout_routing_algorithm":null,"applepay_verified_domains":null,"session_expiry":900,"payment_link_config":null,"authentication_connector_details":null,"use_billing_as_payment_method_billing":true,"extended_card_info_config":null,"collect_shipping_details_from_wallet_connector":false,"collect_billing_details_from_wallet_connector":false,"always_collect_shipping_details_from_wallet_connector":false,"always_collect_billing_details_from_wallet_connector":false,"is_connector_agnostic_mit_enabled":false,"payout_link_config":null,"outgoing_webhook_custom_http_headers":null,"tax_connector_id":null,"is_tax_connector_enabled":false,"is_network_tokenization_enabled":false,"is_auto_retries_enabled":false,"max_auto_retries_enabled":null,"always_request_extended_authorization":null,"is_click_to_pay_enabled":false,"authentication_product_ids":null,"card_testing_guard_config":{"card_ip_blocking_status":"disabled","card_ip_blocking_threshold":3,"guest_user_card_blocking_status":"disabled","guest_user_card_blocking_threshold":10,"customer_id_blocking_status":"disabled","customer_id_blocking_threshold":5,"card_testing_guard_expiry":3600},"is_clear_pan_retries_enabled":false,"force_3ds_challenge":false,"is_debit_routing_enabled":false,"merchant_business_country":null,"is_pre_network_tokenization_enabled":false,"acquirer_configs":null,"is_iframe_redirection_enabled":null,"merchant_category_code":null,"merchant_country_code":null,"dispute_polling_interval":null,"is_manual_retry_enabled":null,"always_enable_overcapture":null,"is_external_vault_enabled":"skip","external_vault_connector_details":null,"billing_processor_id":"mca_NLnCEvS2DfuHWHFVa09o"}

curl --location 'http://localhost:8080/customers' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_0RJW0cwZDeGfSkod0eJWOkfZHK0PCoZtDYJJ1FxeHqhHky1VNPU6nkgFQiTFSDvA' \
--data-raw '{
    "email": "guest@example.com",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "First customer",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    }
}'

{
    "customer_id": "cus_OYy3hzTTt04Enegu3Go3",
    "name": "John Doe",
    "email": "guest@example.com",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "First customer",
    "address": null,
    "created_at": "2025-09-29T14:45:14.430Z",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "default_payment_method_id": null,
    "tax_registration_id": null
}

curl --location 'http://localhost:8080/subscriptions' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'X-Profile-Id: pro_MiKOgwbj84jJ095MoWdj' \
--header 'api-key: dev_I62cGvBVijteiN61aMcAOeYvXpO8s36gT8BFvPznYYDXF4GFtVtjzgiel9oIpvUK' \
--data '{
    "item_price_id": "cbdemo_enterprise-suite-monthly",
    "customer_id": "cus_efEv4nqfrYEo8wSKZ10C",
    "description": "Hello this is description",
    "merchant_reference_id": "mer_ref_1759334677",
    "shipping": {
        "address": {
            "state": "zsaasdas",
            "city": "Banglore",
            "country": "US",
            "line1": "sdsdfsdf",
            "line2": "hsgdbhd",
            "line3": "alsksoe",
            "zip": "571201",
            "first_name": "joseph",
            "last_name": "doe"
        },
        "phone": {
            "number": "123456789",
            "country_code": "+1"
        }
    },
    "billing": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "123456789",
            "country_code": "+1"
        }
    },
    "payment_details": {
        "payment_method": "card",
        "payment_method_type": "credit",
        "payment_method_data": {
            "card": {
                "card_number": "4111111111111111",
                "card_exp_month": "03",
                "card_exp_year": "2030",
                "card_holder_name": "CLBRW dffdg",
                "card_cvc": "737"
            }
        },
        "authentication_type": "no_three_ds",
        "setup_future_usage": "off_session",
        "capture_method": "automatic",
        "return_url": "https://google.com",
        "customer_acceptance": {
            "acceptance_type": "online",
            "accepted_at": "1963-05-03T04:07:52.723Z",
            "online": {
                "ip_address": "127.0.0.1",
                "user_agent": "amet irure esse"
            }
        }
    }
}'

{
    "id": "sub_CkPzNaFAyxzX2WwdKFCr",
    "merchant_reference_id": "mer_ref_1759334529",
    "status": "active",
    "plan_id": null,
    "price_id": null,
    "coupon": null,
    "profile_id": "pro_MiKOgwbj84jJ095MoWdj",
    "payment": {
        "payment_id": "sub_pay_KXEtoTxvu0EsadB5wxNn",
        "status": "succeeded",
        "amount": 14100,
        "currency": "INR",
        "connector": "stripe",
        "payment_method_id": "pm_bDPHgNaP7UZGjtZ7QPrS",
        "payment_experience": null,
        "error_code": null,
        "error_message": null
    },
    "customer_id": "cus_uBtUJLSVSICr8ctmoL8i",
    "invoice": {
        "id": "invoice_Ht72m0Enqy4YOGRKAtbZ",
        "subscription_id": "sub_CkPzNaFAyxzX2WwdKFCr",
        "merchant_id": "merchant_1759157014",
        "profile_id": "pro_MiKOgwbj84jJ095MoWdj",
        "merchant_connector_id": "mca_oMyzcBFcpfISftwDDVuG",
        "payment_intent_id": "sub_pay_KXEtoTxvu0EsadB5wxNn",
        "payment_method_id": null,
        "customer_id": "cus_uBtUJLSVSICr8ctmoL8i",
        "amount": 14100,
        "currency": "INR",
        "status": "payment_pending"
    },
    "billing_processor_subscription_id": "sub_CkPzNaFAyxzX2WwdKFCr"
}

curl --location 'http://localhost:8080/webhooks/merchant_1758710612/mca_YH3XxYGMv6IbKD0icBie' \
--header 'api-key: dev_5LNrrMNqyyFle8hvMssLob9pFq6OIEh0Vl3DqZttFXiDe7wrrScUePEYrIiYfSKT' \
--header 'Content-Type: application/json' \
--header 'authorization: Basic aHlwZXJzd2l0Y2g6aHlwZXJzd2l0Y2g=' \
--data-raw '{
    "api_version": "v2",
    "content": {
        "invoice": {
            "adjustment_credit_notes": [],
            "amount_adjusted": 0,
            "amount_due": 14100,
            "amount_paid": 0,
            "amount_to_collect": 14100,
            "applied_credits": [],
            "base_currency_code": "INR",
            "channel": "web",
            "credits_applied": 0,
            "currency_code": "INR",
            "customer_id": "gaurav_test",
            "date": 1758711043,
            "deleted": false,
            "due_date": 1758711043,
            "dunning_attempts": [],
            "exchange_rate": 1.0,
            "first_invoice": false,
            "generated_at": 1758711043,
            "has_advance_charges": false,
            "id": "3",
            "is_gifted": false,
            "issued_credit_notes": [],
            "line_items": [
                {
                    "amount": 14100,
                    "customer_id": "gaurav_test",
                    "date_from": 1758711043,
                    "date_to": 1761303043,
                    "description": "Enterprise Suite Monthly",
                    "discount_amount": 0,
                    "entity_id": "cbdemo_enterprise-suite-monthly",
                    "entity_type": "plan_item_price",
                    "id": "li_169vD0Uxi8JBp46g",
                    "is_taxed": false,
                    "item_level_discount_amount": 0,
                    "object": "line_item",
                    "pricing_model": "flat_fee",
                    "quantity": 1,
                    "subscription_id": "169vD0Uxi8JB746e",
                    "tax_amount": 0,
                    "tax_exempt_reason": "tax_not_configured",
                    "unit_amount": 14100
                }
            ],
            "linked_orders": [],
            "linked_payments": [],
            "net_term_days": 0,
            "new_sales_amount": 14100,
            "object": "invoice",
            "price_type": "tax_exclusive",
            "recurring": true,
            "reference_transactions": [],
            "resource_version": 1758711043846,
            "round_off_amount": 0,
            "site_details_at_creation": {
                "timezone": "Asia/Calcutta"
            },
            "status": "payment_due",
            "sub_total": 14100,
            "subscription_id": "169vD0Uxi8JB746e",
            "tax": 0,
            "term_finalized": true,
            "total": 14100,
            "updated_at": 1758711043,
            "write_off_amount": 0
        }
    },
    "event_type": "invoice_generated",
    "id": "ev_169vD0Uxi8JDf46i",
    "object": "event",
    "occurred_at": 1758711043,
    "source": "admin_console",
    "user": "ankit.gupta.001@juspay.in",
    "webhook_status": "scheduled",
    "webhooks": [
        {
            "id": "whv2_169mYOUxi3nvkZ8v",
            "object": "webhook",
            "webhook_status": "scheduled"
        }
    ]
}'