Klarna
Klarna Bank AB is a Swedish licensed bank and payments network serving 150M+ consumers and 600k+ merchants with buy-now-pay-later, financing, cards, banking and a shopping app. For developers Klarna publishes a merchant API estate covering payment sessions and authorization (Klarna Payments), hosted checkout (Klarna Checkout and the Hosted Payment Page), post-purchase order management (capture, refund, cancel, extend due date), customer tokens for recurring purchases, settlement payouts and transaction reporting, the Merchant Card Service, and a PSD2 XS2A open-banking API for licensed TPPs. Authentication is HTTP Basic with a Klarna-issued API key; Sign in with Klarna adds a full OAuth 2.0 / OpenID Connect consumer-identity surface. Klarna publishes rate limits, a six-month deprecation policy, public service-level objectives, a self-serve playground with market-specific sample data, and an llms.txt — but no fetchable OpenAPI, no server-side SDK in any language, and no MCP server.
Klarna publishes 19 APIs on the APIs.io network, including Payments API, Checkout API, Customer Token API, and 16 more. Tagged areas include Fintech, BNPL, Payments, Cards, and Shopping.
The Klarna catalog on APIs.io includes 1 event-driven AsyncAPI specification and 2 Spectral governance rulesets.
Klarna’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 34 more developer resources.
Kin Score
APIs 22
Individual APIs this provider publishes, each with its own machine-readable definition.
Klarna Payments API
Create and authorize Klarna payment sessions; create orders against authorizations.
Klarna Checkout API
Hosted Klarna Checkout (KCO), the checkout/v3 surface. Klarna divested the Klarna Checkout product and it now trades as Kustom; as of 2026-08-27 Klarna no longer publishes a ded...
Klarna Order Management API
Capture, refund, cancel and update orders post-authorization.
Klarna Customer Token API
Persist a payment authorization as a customer token for repeat purchases.
Klarna Settlements API
Read merchant settlement reports and transactions.
Klarna Push Notifications
Outbound HTTP POST callbacks Klarna issues to merchant-hosted URLs for Payments authorization, HPP status updates, Checkout push, and pending-order risk decisions.
Klarna Captures API
The Captures API from Klarna — 6 operation(s) for captures.
Klarna Checkout API
The Checkout API from Klarna — 3 operation(s) for checkout.
Klarna Customer Token API
The Customer Token API from Klarna — 3 operation(s) for customer token.
Klarna Hpp API
The Hpp API from Klarna — 3 operation(s) for hpp.
Klarna Merchant Urls.address Update API
The Merchant Urls.address Update API from Klarna — 1 operation(s) for merchant urls.address update.
Klarna Merchant Urls.country Change API
The Merchant Urls.country Change API from Klarna — 1 operation(s) for merchant urls.country change.
Klarna Merchant Urls.shipping Option Update API
The Merchant Urls.shipping Option Update API from Klarna — 1 operation(s) for merchant urls.shipping option update.
Klarna Merchant Urls.validation API
The Merchant Urls.validation API from Klarna — 1 operation(s) for merchant urls.validation.
Klarna Merchantcard API
The Merchantcard API from Klarna — 6 operation(s) for merchantcard.
Klarna Orders API
The Orders API from Klarna — 9 operation(s) for orders.
Klarna Payments API
The Payments API from Klarna — 5 operation(s) for payments.
Klarna Payouts API
The Payouts API from Klarna — 3 operation(s) for payouts.
Klarna Refunds API
The Refunds API from Klarna — 2 operation(s) for refunds.
Klarna Reports API
The Reports API from Klarna — 4 operation(s) for reports.
Klarna Transactions API
The Transactions API from Klarna — 1 operation(s) for transactions.
Klarna Agentic Product Protocol (KAPP) API
Klarna's agent-facing product protocol, exposing product and commerce data for AI agents to query. Registered 2026-09-04 from the same declined submission.
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Open Collections 20
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONKlarna HPP
OPEN COLLECTIONKlarna HPP Captures API
OPEN COLLECTIONKlarna HPP Captures Checkout API
OPEN COLLECTIONKlarna HPP Captures Customer Token API
OPEN COLLECTIONKlarna Captures Hpp API
OPEN COLLECTIONKlarna HPP Captures Merchant Urls.address Update API
OPEN COLLECTIONKlarna HPP Captures Merchant Urls.country Change API
OPEN COLLECTIONKlarna HPP Captures Merchant Urls.shipping Option Update API
OPEN COLLECTIONKlarna HPP Captures Merchant Urls.validation API
OPEN COLLECTIONKlarna HPP Captures Merchantcard API
OPEN COLLECTIONKlarna HPP Captures Orders API
OPEN COLLECTIONKlarna HPP Captures Payments API
OPEN COLLECTIONKlarna HPP Captures Payouts API
OPEN COLLECTIONKlarna HPP Captures Refunds API
OPEN COLLECTIONKlarna HPP Captures Reports API
OPEN COLLECTIONKlarna Settlements API
OPEN COLLECTIONKlarna HPP Captures Transactions API
OPEN COLLECTIONKlarna Merchant Card Service API
OPEN COLLECTIONKlarna Order Management API
OPEN COLLECTIONScroll for all 20
GraphQL 1
GraphQL schemas published by this provider.
Klarna GraphQL Schema
> **NOT PUBLISHED BY KLARNA.** Verified 2026-08-27: Klarna ships no GraphQL API. There is no
GRAPHQLPricing Plans 1
Published pricing tiers and plan structures.
Klarna Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Klarna Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Klarna Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Klarna Push Notifications
AsyncAPI 2.6 description of Klarna's outbound HTTP push surface — the set of server-to-server callbacks that Klarna issues to merchant-hosted endpoints when payment, checkout, a...
ASYNCAPISpectral Rules 2
Spectral governance rulesets for linting and validating these APIs.
Klarna API Rules
SPECTRALKlarna API Rules
SPECTRALJSON Schema 62
Standalone JSON Schema definitions for this provider's data models.
Addon
JSON SCHEMAAddress
JSON SCHEMABackgroundImageV1
JSON SCHEMACancel not allowed error message
JSON SCHEMAcancel_order_request_status_cancelled
JSON SCHEMAcancel_order_request_status_no_request_found
JSON SCHEMAcancel_order_request_status_pending
JSON SCHEMAcancel_order_request_status
JSON SCHEMACapture not allowed error message
JSON SCHEMACapture
JSON SCHEMACaptureObject
JSON SCHEMAcard
JSON SCHEMAcard_specification
JSON SCHEMACarrierProduct
JSON SCHEMAcustomer
JSON SCHEMACustomerV1
JSON SCHEMADistributionContactV1
JSON SCHEMADistributionModuleV1
JSON SCHEMADistributionRequestV1
JSON SCHEMAErrorMessageDto
JSON SCHEMAErrorResponse
JSON SCHEMAExtendDueDateOptions
JSON SCHEMAExtendDueDateRequest
JSON SCHEMAInitialPaymentMethodDto
JSON SCHEMALocation
JSON SCHEMAMerchantManualIdentificationV1
JSON SCHEMAMerchantOrderDto
JSON SCHEMAMerchantUrlsV1
JSON SCHEMANo such capture error message
JSON SCHEMANo such order error message
JSON SCHEMANot allowed error message
JSON SCHEMANot found error message
JSON SCHEMAOptionDto
JSON SCHEMAOptionsV1
JSON SCHEMAorder_line
JSON SCHEMAPagination
JSON SCHEMAPayout
JSON SCHEMAPayoutCollection
JSON SCHEMAPayoutSummary
JSON SCHEMAProductIdentifiers
JSON SCHEMApromise_created_response
JSON SCHEMApromise_request
JSON SCHEMApromise_response
JSON SCHEMARefund not allowed error message
JSON SCHEMARefund
JSON SCHEMARefundObject
JSON SCHEMASelectedShippingOptionDto
JSON SCHEMASessionCreationRequestV1
JSON SCHEMASessionCreationResponseV1
JSON SCHEMASessionResponseV1
JSON SCHEMAsettlement_request
JSON SCHEMAsettlement_response
JSON SCHEMAshipping_info
JSON SCHEMAsubscription
JSON SCHEMATimeslot
JSON SCHEMATotals
JSON SCHEMATransaction
JSON SCHEMATransactionCollection
JSON SCHEMAUpdate authorization
JSON SCHEMAUpdate merchant references
JSON SCHEMAUpdateConsumer
JSON SCHEMAUpdateShippingInfo
JSON SCHEMAScroll for all 62
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 5
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
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Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 5
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
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