Install

Install SumUp Agent Toolkit using:

npm install @sumup/agent-toolkit
# or
yarn add @sumup/agent-toolkit

Observability

Every adapter accepts optional redaction-safe lifecycle callbacks. Events include the tool name, start time, duration, and errors, but never tool arguments or results. Callback failures are ignored so telemetry cannot break tool execution.

const sumupAgentToolkit = new SumUpAgentToolkit({
  apiKey: process.env.SUMUP_API_KEY!,
  observability: {
    onToolEnd: ({ toolName, durationMs }) => {
      metrics.histogram("sumup.agent_tool.duration", durationMs, { toolName });
    },
    onToolError: ({ toolName, error }) => {
      logger.error({ toolName, error }, "SumUp agent tool failed");
    },
  },
});

LangChain

import { SumUpAgentToolkit } from "@sumup/agent-toolkit/langchain";
import { createAgent } from "langchain";

const sumupAgentToolkit = new SumUpAgentToolkit({
  apiKey: process.env.SUMUP_API_KEY!,
});

const agent = createAgent({
  model: "openai:gpt-4o",
  tools: sumupAgentToolkit.getTools(),
});

const response = await agent.invoke({
  messages: [
    {
      role: "user",
      content: "Tell me about my last 10 transactions please.",
    },
  ],
});

AI SDK

import { SumUpAgentToolkit } from "@sumup/agent-toolkit/ai";
import { generateText, stepCountIs } from "ai";

const sumupAgentToolkit = new SumUpAgentToolkit({
  apiKey: process.env.SUMUP_API_KEY!,
});

const response = await generateText({
  model: "openai/gpt-4o",
  tools: sumupAgentToolkit.getTools(),
  stopWhen: stepCountIs(5),
  prompt: "Tell me about my last 10 transactions please.",
});

For full example see AI SDK Example.

OpenAI Agents SDK

import { Agent, run } from "@openai/agents";
import { SumUpAgentToolkit } from "@sumup/agent-toolkit/openai";

const sumupAgentToolkit = new SumUpAgentToolkit({
  apiKey: process.env.SUMUP_API_KEY!,
});

const agent = new Agent({
  name: "Transactions reporter",
  instructions: "You are a helpful payments assistant.",
  tools: sumupAgentToolkit.getTools(),
});

const result = await run(
  agent,
  "Tell me about my last 10 transactions please.",
);

console.log(result.finalOutput);

For full example see OpenAI Example.