Changelog

Stay up to date with the latest changes to the Felloh API, SDKs, and developer documentation.

April 2026

Added Building AI Travel Agents guide — end-to-end guide for building conversational AI agents that handle the full travel payment lifecycle
Added Prompt Engineering for Felloh guide — system prompt templates, currency handling, tool selection, guardrails, and 10+ ready-to-use prompts
Added Agentic Billing Workflows guide — API-level reference for AI-powered travel payment workflows
Added Model Context Protocol (MCP) server documentation — connect AI editors like Cursor, VS Code, Claude Desktop, and ChatGPT to Felloh via MCP at mcp.api.felloh.com
Added one-click install buttons for Cursor and VS Code MCP integration

Added Migrating from Stripe — concept mapping, side-by-side code examples, webhook event mapping, and step-by-step migration plan
Added Migrating from Adyen — Drop-in/Components mapping, manual capture removal, notification batch migration
Added Migrating from Worldpay — XML to JSON migration, HPP replacement, batch file elimination
Added Migrating from Wordline — Ogone form POST migration, SHA signature removal, Connect API mapping
Added Migrating from Trust Payments — JWT/STPP migration, MyST portal replacement, settle status mapping
Added Migrating from Global Payments — Realex XML migration, payer-ref/card-ref replacement, rebate password elimination
Added Migrating from Mint Payments — booking field mapping, camelCase to snake_case, payment schedule migration

Added PCI DSS Compliance guide — SAQ A qualification, tokenisation architecture, travel-specific PCI guidance, compliance checklist
Added Strong Customer Authentication (SCA) guide — 3DS handling, merchant-initiated transaction exemptions, Fraud Shield 3DS rules, travel-specific SCA patterns
Added Security at Felloh overview page
Added Integration Security Guide with best practices for securing your Felloh integration
Added Handling Deletion Requests guide for GDPR compliance

Added Quickstart guide — authenticate, create a booking, send a payment link, and verify the transaction in under 5 minutes

Added Testing page with sandbox environment details, test card numbers (Visa, Mastercard, Amex), decline simulation cards, 3D Secure test cards, and a go-live checklist

Added C# SDK documentation — installation, examples, pagination, error handling, and webhook verification
Added PHP SDK documentation — installation, examples, pagination, error handling, and webhook verification
Added Python SDK documentation — async SDK with installation, examples, pagination, error handling, and webhook verification
Added Perl SDK documentation — installation, examples, pagination, error handling, and webhook verification
Added Ruby SDK documentation — installation, examples, pagination, error handling, and webhook verification
Expanded Node.js SDK documentation with additional examples and webhook verification

Added webhook signing documentation — HMAC-SHA256 signature verification with code examples in JavaScript, Python, PHP, and C#

Added Acquirer Settlement resource documentation — batch settlement data from payment processors
Added Dynamic Currency Conversion (DCC) documentation to transaction resources
Added booking reference field documentation across bookings resources