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Get a hosted checkout

The checkout.hosted.get operation: GET /api/v1/public/checkout_sessions/{sessionId} in the REST API and the checkout_hosted_get tool in the MCP server.

GET/api/v1/public/checkout_sessions/{sessionId}

Returns a checkout session as its hosted page shows it: the brand and the seller's disclosure, the line items, the customer's details so far, the current tax quote (lines with rate, jurisdiction and regime; the totals), why the sale is paused and whether the waitlist is offered, the payment step, the legal consents and, once complete, the success URL. The page polls it until the session is complete.

Public: the hosted page calls it without an API key, with the session key from its URL (?key=…).

At a glance

  • REST: GET /api/v1/public/checkout_sessions/{sessionId}
  • MCP tool: checkout_hosted_get
  • Operation ID: checkout.hosted.get
  • Scope: Brand
  • Permission: checkout:read
  • Risk tier: read
  • Dry run: Not supported
  • Idempotency: Not needed (read only)
  • Modes: Test and live
  • Authentication: None (a public endpoint, rate-limited per IP address)
  • Since: M4

Request

Path parameters

FieldTypeDescription
sessionIdcs_… IDThe checkout session's ID (cs_…).

Query parameters

FieldTypeRequiredDescription
keystringNoThe session key from the hosted URL (?key=…). Required without an API key; signed-in callers with checkout:write don't need it.

Response

200 OK with a JSON object:

FieldTypeDescription
idcs_… ID
object"checkout.hosted_session"
livemodeboolean
statusone of open, processing, complete, expired, blocked
modeone of payment, subscription, topup, setup
currencystring
brandobject
brand.slugstring
brand.namestring
brand.primaryColorstring or null
brand.termsUrlstring or null
brand.privacyUrlstring or null
brand.supportEmailstring or null
sellerobjectThe merchant disclosure: “Sold by {legal name}, {address}, {VAT ID}” (spec §29.1).
seller.legalNamestring
seller.addressstring
seller.taxIdstring
lineItemsarray of object
lineItems[].idstring
lineItems[].descriptionstring
lineItems[].quantityinteger
lineItems[].amountmoney
lineItems[].recurringobject or null
lineItems[].adjustableQuantityobject or null
lineItems[].discountmoney or null
subscriptionobject or nullSubscription sessions: the trial, what is due today and the promotion code.
topupobject or nullTop-up sessions (spec §14.3): what the customer's wallet receives.
setupobject or nullSetup sessions: whether saving the card also pays the subscription's first invoice.
collectBusinessDetailsone of auto, required, never
prefillobject
prefill.emailstring or null
prefill.namestring or null
prefill.countrystring or null
prefill.subdivisionstring or null
prefill.businessobject or null
quoteobject or null
blockedobject or null
waitlistobject or null
paymentobject
payment.startedboolean
payment.intentone of payment, setup or nullpayment: a charge now; setup: the card is saved without a charge.
payment.componentone of fake, stripe_payment_element, redirect or nullHow the payment details are collected: the fake processor's test cards, the Stripe Payment Element, or redirect (the buyer pays on the processor's page, Mollie; confirm answers its address).
payment.publishableKeystring or null
payment.paymentMethodobject or null
payment.upToDatebooleanThe prepared payment is for the current quote's total.
legalobject
legal.termsAcceptedboolean
legal.immediatePerformanceRequiredboolean
legal.immediatePerformanceTextstring
successUrlstring or nullSet once the session is complete: successUrl?cs_id=….
cancelUrlstring or null
expiresAtdate-time
localeobjectWhat decides the page's language (spec §14.2): an explicit choice on the page, then preferred, then the browser's languages, then brand, then English.
locale.preferredarray of stringThe session's language, then its customer's, where set (BCP 47): the page's language before the visitor's.
locale.brandarray of stringThe brand's checkout languages; the first is its default.

Examples

A consumer in Germany, quoted

HTTP
GET /api/v1/public/checkout_sessions/cs_01m4tx5nj8emwbyf7y9vcf48aa?key=Zk3tq8Vb2xQ9mN4rP7sL1yH6cJ0wE5aD-uT_fG8hK2o

Response (200):

JSON
{
  "id": "cs_01m4tx5nj8emwbyf7y9vcf48aa",
  "object": "checkout.hosted_session",
  "livemode": false,
  "status": "open",
  "mode": "payment",
  "currency": "EUR",
  "brand": {
    "slug": "genno",
    "name": "Genno",
    "primaryColor": null,
    "termsUrl": "https://genno.example/terms",
    "privacyUrl": "https://genno.example/privacy",
    "supportEmail": null
  },
  "seller": {
    "legalName": "Etna Labs AG",
    "address": "Dammstrasse 16, 6300 Zug, Switzerland",
    "taxId": "CHE-181.927.786 MWST"
  },
  "lineItems": [
    {
      "id": "1",
      "description": "Genno credits",
      "quantity": 1,
      "amount": {
        "amount": "100000000",
        "currency": "EUR"
      },
      "recurring": null,
      "adjustableQuantity": null,
      "discount": null
    }
  ],
  "subscription": null,
  "topup": null,
  "setup": null,
  "collectBusinessDetails": "auto",
  "prefill": {
    "email": "anna@example.com",
    "name": null,
    "country": "DE",
    "subdivision": null,
    "business": null
  },
  "quote": {
    "id": "tq_01m4tx5nj8emwbyf7y9vcf48ab",
    "decision": "charge",
    "customerType": "b2c",
    "country": "DE",
    "lines": [
      {
        "id": "1",
        "description": "Genno credits",
        "quantity": 1,
        "treatment": "charge",
        "net": {
          "amount": "84033613",
          "currency": "EUR"
        },
        "tax": {
          "amount": "15966387",
          "currency": "EUR"
        },
        "gross": {
          "amount": "100000000",
          "currency": "EUR"
        },
        "ratePpm": "190000",
        "jurisdictionId": "DE",
        "jurisdictionName": "Germany",
        "taxName": "VAT",
        "regimeId": "EU_OSS_NON_UNION",
        "pendingRegistration": false,
        "taxBehavior": "inclusive"
      }
    ],
    "totals": {
      "net": {
        "amount": "84033613",
        "currency": "EUR"
      },
      "tax": {
        "amount": "15966387",
        "currency": "EUR"
      },
      "gross": {
        "amount": "100000000",
        "currency": "EUR"
      }
    },
    "inclusive": true,
    "reverseCharge": false,
    "reverseChargeWording": null,
    "validUntil": "2026-10-14T10:30:00.000Z",
    "unverifiedRules": false
  },
  "blocked": null,
  "waitlist": null,
  "payment": {
    "started": false,
    "intent": null,
    "component": null,
    "publishableKey": null,
    "paymentMethod": null,
    "upToDate": false
  },
  "legal": {
    "termsAccepted": false,
    "immediatePerformanceRequired": true,
    "immediatePerformanceText": "I want the service to start now, and I understand that I lose my right to withdraw once it has started."
  },
  "successUrl": null,
  "cancelUrl": "https://shop.example/cart",
  "expiresAt": "2026-10-15T10:00:00.000Z",
  "locale": {
    "preferred": [],
    "brand": ["en"]
  }
}

Errors

CodeHTTP statusWhenWhat to do
resource_not_found404No such checkout session for this brand and mode, or (on the hosted page) the session key is missing or wrong.Check the ID and that your credentials are scoped to the right organization, entity, brand and mode.

It can also return these common errors: validation_failed, api_version_unsupported, scope_required, dry_run_not_supported, rate_limited, internal_error.