DeBounce MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with DeBounce MCP or direct API to validate emails, enrich contact data, check account usage, and process bulk validation lists through natural language.

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Api Key

DeBounce is an email verification service for checking address validity, deliverability, and risk. It helps keep contact lists clean so your campaigns reach real inboxes.

4 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 DeBounce action and event your agent gets out of the box.

Get Account Balance

Return the connected DeBounce account's remaining validation-credit balance.

Get API Usage

Return the aggregate number of DeBounce API validation calls in an inclusive date range.

Get Bulk Validation Status

Check progress for a bulk validation list created through the DeBounce Bulk API and return its result download URL when available.

Validate Email

Validate one email address with DeBounce and return its deliverability result, reason, and remaining credit balance.

SETUP GUIDE

Connect DeBounce 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: ["debounce"],
  mcp: true,
});
Create a session scoped to DeBounce 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: "Validate the email address alex@example.com with DeBounce and explain the result.",
  stopWhen: stepCountIs(10),
});

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

Connect DeBounce 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: ["debounce"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to DeBounce
3

Run DeBounce tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Validate the email address alex@example.com with DeBounce and explain the result." }],
});

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 DeBounce tool calls through the session, and print the final answer

Why Use Composio?

AI Native DeBounce Integration

  • Supports both DeBounce MCP and direct API based integrations
  • Structured, LLM-friendly schemas for dependable email validation workflows
  • Rich coverage for validating addresses, checking usage, enriching contacts, and running bulk list checks

Managed Auth

  • Secure API key handling so you don't hard-code DeBounce credentials in agent code
  • Central place to manage, scope, and revoke DeBounce access
  • Per user and per environment credentials for cleaner production deployments

Agent Optimized Design

  • Tools are shaped for language models, so agents can pick the right DeBounce action with less guesswork
  • Clear inputs and outputs make email validation results easier for agents to explain
  • 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 DeBounce
  • Scoped, least privilege access to DeBounce resources
  • Full audit trail of agent actions to support review and compliance

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

When you connect a DeBounce account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in DeBounce 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 DeBounce. If DeBounce 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 DeBounce 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 DeBounce 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 DeBounce rejects the old key. Create a new key in DeBounce and reconnect the account from the Composio dashboard or by asking your agent to reconnect DeBounce. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal DeBounce use. Paid plans add higher limits and team features. Your DeBounce 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 DeBounce accounts).

With Composio, you connect DeBounce 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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