Softlemon API Documentation
  • Merchant API
  • Partner API
  • Guides
API basics
    API ConventionsEnvironmentsError HandlingRate LimitsSCA and PSD2SupportChangelog
Integration flows
    Accept a Card PaymentAuthorize Now, Capture LaterRefund a PaymentCharge a Returning CustomerAccept an Alternative PaymentPaysafecard via Skrill: Customer JourneySet Up WebhooksIntegrate as a Partner
Reference
    Merchant Transaction WebhooksTransaction StatusesDuplicate Payment Protection
API basics

Support

Contact

Use the support contact and status page details the SoftLemon team gives you during onboarding. If you do not have them, ask your SoftLemon account manager. Response times are agreed per account.

Reporting an API problem

Include the following in your report and support can usually reproduce the issue immediately:

  • The environment (sandbox or production) and the endpoint you called.
  • The transaction id or reference involved.
  • The full response body, especially the code value. See error handling for what each code means.
  • Timestamps in UTC for when the requests were made.
  • Your merchant name or id. Never include your API key or full card numbers.

Before you contact us

  • Declines with card error codes such as ERR_CARD_DO_NOT_HONOR are issuer decisions. The customer's bank declined and only the customer can resolve it with their bank.
  • A 409 response means duplicate protection caught a repeated reference. That is the system working as intended.
  • 429 responses mean you hit the rate limit. Back off and smooth your traffic before asking for a higher limit.
  • Webhook delivery issues are usually reachability or signature verification problems on the receiving side. Work through the webhooks guide checklist first.

Requesting account changes

Payment method enablement, currency setup, higher rate limits and new API keys are account changes handled by the SoftLemon team. Contact support with your merchant id and what you need.

Last modified on September 7, 2026
SCA and PSD2Changelog
On this page
  • Contact
  • Reporting an API problem
  • Before you contact us
  • Requesting account changes