app

Mollie

Build Mollie payment flows

Connects Codex to your Mollie account through the Mollie MCP server and adds skills for building Mollie integrations: hosted checkout and Components, Mollie Connect for platforms and marketplaces, recurring payments and subscriptions, refunds, captures, chargebacks and settlements, webhook and credential troubleshooting, SDK upgrades, and AI agents built on the Mollie agent toolkit.

How to use

  1. 1Add it in ChatGPT

    Open Mollie in ChatGPT's Plugin directory (button above), select + to add it and sign in if asked.

  2. 2Use it in a chat

    Type @ in the composer and pick Mollie, or start your message with its name. ChatGPT may also suggest it when it fits what you ask.

Skills 3

  • mollie-agent-toolkit

    Activate this skill when a developer wants to build an AI agent that uses Mollie — giving an LLM function-calling access to Mollie via @mollie/agent-toolkit. This includes: OpenAI Agents SDK, LangChain, or Vercel AI SDK integrations with Mollie; letting an agent list/create payments, issue refunds, manage customers or subscriptions, or read balances/settlements; tool allowlisting for an LLM agent; and safety controls for agents that can move money. This is distinct from `mollie-payments`, which is about integrating Mollie into a regular application, not building an agent around it.

  • mollie-payments

    Activate this skill when a developer is working with Mollie: integrating payments, setting up Mollie Connect for a platform/marketplace, building recurring payments or subscriptions, issuing refunds or captures, investigating chargebacks or settlements, or troubleshooting a Mollie integration. This includes: hosted checkout, custom checkout, Mollie Components (card fields), payment links, webhooks and payment status handling, Next.js / React / Vue / Node.js / PHP / Python integrations, 3D Secure, PCI compliance, payment methods (iDEAL, credit card, SEPA, Klarna, Apple Pay, Google Pay, Bancontact), OAuth onboarding, submerchants, application fees, customers and mandates, subscriptions, reconciliation, sales invoices and B2B invoicing, stuck or pending payments, missing webhooks, and 401/403 errors.

  • mollie-upgrade

    Activate this skill when a developer wants to upgrade their Mollie SDK to a newer version, or migrate an existing integration from a deprecated Mollie API to its replacement — most commonly migrating from the Orders API to the Payments API. This includes: updating @mollie/api-client, mollie-api-php, mollie-api-python, or mollie-api-typescript to a newer major version, resolving breaking changes after an upgrade, and moving off the Orders API (orderNumber, order lines, Shipments API, order cancellation) onto the Payments API (captures, release-authorization, unified refunds).

Things to ask

  • “Add Mollie hosted checkout to my app”
  • “Why is my Mollie webhook not being received?”
  • “Migrate my integration from the Orders API to the Payments API”

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