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Chaser MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Chaser MCP or direct API to automate invoice reminders, track outstanding payments, manage customer communications, and update invoice statuses through natural language.

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Chaser is accounts receivable automation software that sends invoice reminders and helps businesses get paid faster. It streamlines the collections process to save time and improve cash flow.

30 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every Chaser action and event your agent gets out of the box.

Create Contact Person

Tool to create a new contact person for a customer in Chaser.

Create Invoice

Tool to create a new invoice record in the organization.

Create Overpayment

Creates a new overpayment record in Chaser for tracking customer overpayments.

Delete Contact Person

Tool to delete a contact person from a customer record in Chaser.

Get Contact Person by ID

Tool to get a specific contact person by ID for a customer.

Get Credit Note by ID

Retrieve detailed information for a specific credit note by its ID.

Get Credit Notes

Retrieves a list of credit notes from Chaser.

Get Current Organisation

Tool to retrieve information about the current organisation associated with the API credentials.

Get Customer by ID

Retrieve detailed information for a specific customer by their Chaser customer ID.

Get Customers

Tool to retrieve a list of all customers associated with the organization.

Get Invoice by ID

Tool to retrieve detailed information for a specific invoice by its ID.

Get Organization

Tool to retrieve information about the connected organizations.

Get Overpayment

Retrieve detailed information for a specific overpayment by its ID.

Get Status

Tool to check the status of the Chaser API.

List Contact Persons

Tool to retrieve contact persons for a specific customer.

List Invoices

Tool to retrieve invoices with pagination and filtering.

List Overpayments

Tool to retrieve overpayments from Chaser with pagination and filtering.

Create Credit Note

Creates a new credit note record in Chaser for tracking customer credits.

Create Customer

Tool to create a new customer record in Chaser.

Update Credit Note

Update an existing credit note in Chaser.

Update Customer

Tool to update an existing customer's information using their unique Chaser customer ID.

Update Invoice

Update an existing invoice in Chaser by its internal ID.

Update Contact Person

Tool to update a contact person for a customer in Chaser.

Update Overpayment

Tool to update an overpayment record in Chaser.

Upload Invoice PDF

Upload a PDF file to an existing invoice in Chaser.

Bulk Upsert Customers

Tool to bulk upsert up to 100 customers in a single operation.

Bulk Upsert Contact Persons

Tool to bulk insert or update contact persons for a customer.

Bulk Upsert Credit Notes

Tool to bulk upsert up to 100 credit notes in a single request.

Bulk Upsert Invoices

Tool to bulk upsert up to 100 invoices in a single request.

Bulk Upsert Overpayments

Tool to bulk upsert up to 100 overpayments in Chaser, matching by overpayment_id.

SETUP GUIDE

Connect Chaser MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["chaser"],
  mcp: true,
});
Create a session scoped to Chaser and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Send invoice reminders to all overdue customers this week",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Chaser request
SETUP GUIDE

Connect Chaser API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["chaser"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Chaser
3

Run Chaser tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Send invoice reminders to all overdue customers this week" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Chaser tool calls through the session, and print the final answer

Why Use Composio?

AI Native Chaser Integration

  • Supports both Chaser MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Chaser data

Managed Auth

  • Built-in OAuth handling with automatic token refresh and rotation
  • Central place to manage, scope, and revoke Chaser access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Chaser
  • Scoped, least privilege access to Chaser resources
  • Full audit trail of agent actions to support review and compliance
FRAMEWORKS

Use Chaser with any AI Agent Framework

Choose a Framework you want to connect Chaser with

Claude Code logo

Claude Code

Use Chaser MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Chaser MCP with Claude Cowork

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Chaser MCP with OpenAI Agents SDK

Claude Agents SDK logo

Claude Agents SDK

Use Chaser MCP with Claude Agents SDK

Codex logo

Codex

Use Chaser MCP with Codex

OpenClaw logo

OpenClaw

Use Chaser MCP with OpenClaw

Hermes logo

Hermes

Use Chaser MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Chaser MCP with Atomic Agent

Google ADK logo

Google ADK

Use Chaser MCP with Google ADK

Langchain logo

Langchain

Use Chaser MCP with Langchain

AI SDK logo

AI SDK

Use Chaser MCP with AI SDK

Mastra AI logo

Mastra AI

Use Chaser MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Chaser MCP with LlamaIndex

CrewAI logo

CrewAI

Use Chaser MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Chaser MCP with Pydantic AI

Autogen logo

Autogen

Use Chaser MCP with Autogen

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Chaser requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Chaser connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Chaser account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Chaser actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Chaser at any time.

When you connect a Chaser account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Chaser as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Chaser. If Chaser lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Chaser at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Chaser connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Chaser rejects the old key. Create a new key in Chaser and reconnect the account from the Composio dashboard or by asking your agent to reconnect Chaser. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Chaser use. Paid plans add higher limits and team features. Your Chaser plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Chaser accounts).

With Composio, you connect Chaser once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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