Stripe: Attach a Payment Method to a Customer

Stripe paymentMethods.postPaymentMethodsPaymentMethodAttach: arguments, response, policy and SDK examples.

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Operation stripe.postpaymentmethodspaymentmethodattach

Provider route: POST /v1/payment_methods/{payment_method}/attach. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/stripe with npm, or alter-sdk-stripe with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { StripeIntegration } from "@alter-ai/stripe";

async function execute(input: Parameters<StripeIntegration["paymentMethods"]["postPaymentMethodsPaymentMethodAttach"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new StripeIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.paymentMethods.postPaymentMethodsPaymentMethodAttach(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_stripe import StripeIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = StripeIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.payment_methods.post_payment_methods_payment_method_attach(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
`$`	object	Root	Additional keys: not allowed
`path`	object	Required within parent	Additional keys: not allowed
`path.payment_method`	string	Required within parent	Maximum length: 5000
`headers`	object	Optional	Additional keys: not allowed
`headers.Idempotency-Key`	string	Optional	Minimum length: 1 Maximum length: 255
`body`	object	Optional	Additional keys: not allowed
`body.customer`	string	Optional	The ID of the customer to which to attach the PaymentMethod. Maximum length: 5000
`body.customer_account`	string	Optional	The ID of the Account representing the customer to which to attach the PaymentMethod. Maximum length: 5000
`body.expand`	array	Optional	Specifies which fields in the response should be expanded.
`body.expand[]`	string	Each item	Maximum length: 5000

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
`$`	Model	Root	Expand Create a Payment Method — response body

Referenced models: Create a Payment Method — response body

Schemas

697 more schemas are linked from the tables above, on the schema pages.

Create a Payment Method — response body — zip

Field	Type	Presence	Description and constraints
`$`	object	Root

Create a charge — response body — billing details

Field	Type	Presence	Description and constraints
`$`	object	Root
`address`	JSON	Optional
`address (anyOf 1)`	JSON	Alternative	Billing address.
`address (anyOf 1) (anyOf 1)`	Model	Alternative	Expand Create a Location — response body — address
`address (anyOf 2)`	null	Alternative
`email`	JSON	Optional
`email (anyOf 1)`	string	Alternative	Email address. Maximum length: 5000
`email (anyOf 2)`	null	Alternative
`name`	JSON	Optional
`name (anyOf 1)`	string	Alternative	Full name. Maximum length: 5000
`name (anyOf 2)`	null	Alternative
`phone`	JSON	Optional
`phone (anyOf 1)`	string	Alternative	Billing phone number (including extension). Maximum length: 5000
`phone (anyOf 2)`	null	Alternative
`tax_id`	JSON	Optional
`tax_id (anyOf 1)`	string	Alternative	Taxpayer identification number. Used only for transactions between LATAM buyers and non-LATAM sellers. Maximum length: 5000
`tax_id (anyOf 2)`	null	Alternative

Referenced models: Create a Location — response body — address

Create a Payment Method — response body — acss debit

Field	Type	Presence	Description and constraints
`$`	object	Root
`bank_name`	JSON	Optional
`bank_name (anyOf 1)`	string	Alternative	Name of the bank associated with the bank account. Maximum length: 5000
`bank_name (anyOf 2)`	null	Alternative
`fingerprint`	JSON	Optional
`fingerprint (anyOf 1)`	string	Alternative	Uniquely identifies this particular bank account. You can use this attribute to check whether two bank accounts are the same. Maximum length: 5000
`fingerprint (anyOf 2)`	null	Alternative
`institution_number`	JSON	Optional
`institution_number (anyOf 1)`	string	Alternative	Institution number of the bank account. Maximum length: 5000
`institution_number (anyOf 2)`	null	Alternative
`last4`	JSON	Optional
`last4 (anyOf 1)`	string	Alternative	Last four digits of the bank account number. Maximum length: 5000
`last4 (anyOf 2)`	null	Alternative
`transit_number`	JSON	Optional
`transit_number (anyOf 1)`	string	Alternative	Transit number of the bank account. Maximum length: 5000
`transit_number (anyOf 2)`	null	Alternative

Create a Payment Method — response body — au becs debit

Field	Type	Presence	Description and constraints
`$`	object	Root
`bsb_number`	JSON	Optional
`bsb_number (anyOf 1)`	string	Alternative	Six-digit number identifying bank and branch associated with this bank account. Maximum length: 5000
`bsb_number (anyOf 2)`	null	Alternative
`fingerprint`	JSON	Optional
`fingerprint (anyOf 1)`	string	Alternative	Uniquely identifies this particular bank account. You can use this attribute to check whether two bank accounts are the same. Maximum length: 5000
`fingerprint (anyOf 2)`	null	Alternative
`last4`	JSON	Optional
`last4 (anyOf 1)`	string	Alternative	Last four digits of the bank account number. Maximum length: 5000
`last4 (anyOf 2)`	null	Alternative

Create a Payment Method — response body — bacs debit

Field	Type	Presence	Description and constraints
`$`	object	Root
`fingerprint`	JSON	Optional
`fingerprint (anyOf 1)`	string	Alternative	Uniquely identifies this particular bank account. You can use this attribute to check whether two bank accounts are the same. Maximum length: 5000
`fingerprint (anyOf 2)`	null	Alternative
`last4`	JSON	Optional
`last4 (anyOf 1)`	string	Alternative	Last four digits of the bank account number. Maximum length: 5000
`last4 (anyOf 2)`	null	Alternative
`sort_code`	JSON	Optional
`sort_code (anyOf 1)`	string	Alternative	Sort code of the bank account. (e.g., `10-20-30`) Maximum length: 5000
`sort_code (anyOf 2)`	null	Alternative

Create a Payment Method — response body — bizum

Field	Type	Presence	Description and constraints
`$`	object	Root
`buyer_id`	JSON	Optional
`buyer_id (anyOf 1)`	string	Alternative	A unique identifier for the buyer as determined by the local payment processor. Maximum length: 5000
`buyer_id (anyOf 2)`	null	Alternative

Create a Payment Method — response body — blik

Field	Type	Presence	Description and constraints
`$`	object	Root
`buyer_id`	JSON	Optional
`buyer_id (anyOf 1)`	string	Alternative	A unique and immutable identifier assigned by BLIK to every buyer. Maximum length: 5000
`buyer_id (anyOf 2)`	null	Alternative

Create a Payment Method — response body — boleto

Field	Type	Presence	Description and constraints
`$`	object	Root
`tax_id`	string	Required within parent	Uniquely identifies the customer tax id (CNPJ or CPF) Maximum length: 5000

Create a Payment Method — response body — cashapp

Field	Type	Presence	Description and constraints
`$`	object	Root
`buyer_id`	JSON	Optional
`buyer_id (anyOf 1)`	string	Alternative	A unique and immutable identifier assigned by Cash App to every buyer. Maximum length: 5000
`buyer_id (anyOf 2)`	null	Alternative
`cashtag`	JSON	Optional
`cashtag (anyOf 1)`	string	Alternative	A public identifier for buyers using Cash App. Maximum length: 5000
`cashtag (anyOf 2)`	null	Alternative

Create a Payment Method — response body — custom

Field	Type	Presence	Description and constraints
`$`	object	Root
`display_name`	JSON	Optional
`display_name (anyOf 1)`	string	Alternative	Display name of the Dashboard-only CustomPaymentMethodType. Maximum length: 5000
`display_name (anyOf 2)`	null	Alternative
`logo`	JSON	Optional
`logo (anyOf 1)`	JSON	Alternative	Contains information about the Dashboard-only CustomPaymentMethodType logo.
`logo (anyOf 1) (anyOf 1)`	Model	Alternative	Expand Create a Payment Method — response body — custom logo value content type, url
`logo (anyOf 2)`	null	Alternative
`type`	string	Required within parent	ID of the Dashboard-only CustomPaymentMethodType. Not expandable. Maximum length: 5000

Referenced models: Create a Payment Method — response body — custom logo value content type, url

Create a Payment Method — response body — eps

Field	Type	Presence	Description and constraints
`$`	object	Root
`bank`	JSON	Optional
`bank (anyOf 1)`	string	Alternative	The customer's bank. Should be one of `arzte_und_apotheker_bank`, `austrian_anadi_bank_ag`, `bank_austria`, `bankhaus_carl_spangler`, `bankhaus_schelhammer_und_schattera_ag`, `bawag_psk_ag`, `bks_bank_ag`, `brull_kallmus_bank_ag`, `btv_vier_lander_bank`, `capital_bank_grawe_gruppe_ag`, `deutsche_bank_ag`, `dolomitenbank`, `easybank_ag`, `erste_bank_und_sparkassen`, `hypo_alpeadriabank_international_ag`, `hypo_noe_lb_fur_niederosterreich_u_wien`, `hypo_oberosterreich_salzburg_steiermark`, `hypo_tirol_bank_ag`, `hypo_vorarlberg_bank_ag`, `hypo_bank_burgenland_aktiengesellschaft`, `marchfelder_bank`, `oberbank_ag`, `raiffeisen_bankengruppe_osterreich`, `schoellerbank_ag`, `sparda_bank_wien`, `volksbank_gruppe`, `volkskreditbank_ag`, or `vr_bank_braunau`. Known values: arzte_und_apotheker_bank, austrian_anadi_bank_ag, bank_austria, bankhaus_carl_spangler, bankhaus_schelhammer_und_schattera_ag, bawag_psk_ag, bks_bank_ag, brull_kallmus_bank_ag, btv_vier_lander_bank, capital_bank_grawe_gruppe_ag, deutsche_bank_ag, dolomitenbank, easybank_ag, erste_bank_und_sparkassen, hypo_alpeadriabank_international_ag, hypo_bank_burgenland_aktiengesellschaft, hypo_noe_lb_fur_niederosterreich_u_wien, hypo_oberosterreich_salzburg_steiermark, hypo_tirol_bank_ag, hypo_vorarlberg_bank_ag, marchfelder_bank, oberbank_ag, raiffeisen_bankengruppe_osterreich, schoellerbank_ag, sparda_bank_wien, volksbank_gruppe, volkskreditbank_ag, vr_bank_braunau
`bank (anyOf 2)`	null	Alternative

Create a Payment Method — response body — klarna

Field	Type	Presence	Description and constraints
`$`	object	Root
`dob`	JSON	Optional
`dob (anyOf 1)`	JSON	Alternative	The customer's date of birth, if provided.
`dob (anyOf 1) (anyOf 1)`	Model	Alternative	Expand Create a person — accounts post Accounts Account People — response body — dob
`dob (anyOf 2)`	null	Alternative

Referenced models: Create a person — accounts post Accounts Account People — response body — dob

Policy, approvals and errors

SDK function policy ID: stripe.postpaymentmethodspaymentmethodattach. Catalog operation: PostPaymentMethodsPaymentMethodAttach. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Pinned headers: {"Stripe-Version": "2026-09-30.endive"}

Official provider source

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