How do I find my Afterpay Merchant credentials?

Log in to your Afterpay Merchant Portal, go to **Settings** > **API**. You can generate and retrieve your **Merchant ID** and **Secret Key** there. Make sure to choose the correct region (US, AU, UK).

Can I process a partial refund via the agent?

Yes! Use the `refund_payment` tool and provide the `orderId` and the specific amount. Your agent will submit the partial refund request to Afterpay for processing.

What is the difference between Capture and Auth?

'Capture' finalizes the payment immediately. 'Auth' (Authorization) holds the funds on the customer's account, and you must call the capture tool later (usually when shipping) to finalize the transaction.

Afterpay MCP Server for LangChain 5 tools — connect in under 2 minutes

Name: Afterpay
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 5 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Afterpay through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "afterpay": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Afterpay, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Afterpay MCP Server

Connect your Afterpay (Clearpay) merchant account to your AI agent to unlock enterprise-grade BNPL (Buy Now, Pay Later) orchestration. From creating secure checkout tokens to monitoring payment statuses and processing partial refunds, your agent handles your financial transactions through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Afterpay through native MCP adapters. Connect 5 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Checkout Orchestration — Create new checkout sessions and retrieve secure redirect tokens for your customers
Payment Monitoring — List and audit historical payments, check capture statuses, and retrieve technical metadata
Refund Management — Initiate full or partial refunds for specific orders directly from your chat interface
Configuration Audit — Retrieve merchant-specific configuration including minimum and maximum order limits
Transaction Insights — Quickly identify successful captures or pending authorizations without manual dashboard exports

The Afterpay MCP Server exposes 5 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Afterpay to LangChain via MCP

Follow these steps to integrate the Afterpay MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 5 tools from Afterpay via MCP

Why Use LangChain with the Afterpay MCP Server

LangChain provides unique advantages when paired with Afterpay through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Afterpay MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Afterpay queries for multi-turn workflows

Afterpay + LangChain Use Cases

Practical scenarios where LangChain combined with the Afterpay MCP Server delivers measurable value.

RAG with live data: combine Afterpay tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Afterpay, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Afterpay tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Afterpay tool call, measure latency, and optimize your agent's performance

Afterpay MCP Tools for LangChain (5)

These 5 tools become available when you connect Afterpay to LangChain via MCP:

create_checkout

The amount must fall within the configured limits. Initiate a secure Afterpay BNPL payment session token for a customer transaction

get_afterpay_config

Retrieve the minimum and maximum order transaction limits enforced by your Afterpay merchant account

get_payment_details

Retrieve detailed financial status, settlement info, and logs for a specific Afterpay order ID

list_payments

Retrieve historical BNPL transactions and authorizations securely from your Afterpay account

refund_payment

Always verify the remaining balance before refunding. Initiate a full or partial refund to immediately credit a consumer against a previously captured Afterpay order

Example Prompts for Afterpay in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Afterpay immediately.

"Create an Afterpay checkout session for $100.00."

"Check the status of order ID '12345678'."

"Show me my current Afterpay order limits."

Troubleshooting Afterpay MCP Server with LangChain

Common issues when connecting Afterpay to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Afterpay + LangChain FAQ

Common questions about integrating Afterpay MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.