cve.now MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with cve.now MCP or direct API to search vulnerability feeds, look up CVEs, check package versions, and summarize security findings through natural language.

cve.now MCP logocve.now MCP
No Auth

cve.now is a free public vulnerability feed and lookup service for CVEs, GHSAs, OSVs, and package versions. It provides fast, exact vulnerability checks against an indexed catalog without requiring authentication.

3 Tools

Try cve.now MCP now

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

TOOL ROUTER PLAYGROUND
cve.now MCP
Try asking
TOOLS

Supported Tools

Every cve.now MCP action and event your agent gets out of the box.

Check stack

Check exact package versions against cve.

Get vulnerability

Get one vulnerability entry by CVE, GHSA or OSV id, as JSON.

List feed

List the newest items in a cve.

SETUP GUIDE

Connect cve.now 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: ["cve_now_mcp"],
  mcp: true,
});
Create a session scoped to cve.now MCP 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: "Check package version lodash 4.17.20 for known vulnerabilities and summarize the results.",
  stopWhen: stepCountIs(10),
});

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

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

Run cve.now MCP tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Check package version lodash 4.17.20 for known vulnerabilities and summarize the results." }],
});

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 cve.now MCP tool calls through the session, and print the final answer

Why Use Composio?

AI Native cve.now MCP Integration

  • Supports both cve.now MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable vulnerability lookups
  • Query CVE, GHSA, OSV, feed, and exact package-version data without writing bespoke integration code

No Credential Setup

  • cve.now is publicly available and requires no API keys or OAuth setup
  • Composio creates the session and exposes the selected cve.now tools to your agent
  • Keep your application focused on security workflows instead of connection plumbing

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Agents can turn structured vulnerability results into clear, actionable summaries
  • Comprehensive execution logs show what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC helps control which agents and users can access cve.now MCP
  • Scoped tool access supports least-privilege security review workflows
  • Full audit trails help teams review automated vulnerability checks and findings
FRAMEWORKS

Use cve.now MCP with any AI Agent Framework

Choose a Framework you want to connect cve.now MCP with

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

No, cve.now MCP requires no developer credentials or authentication. Composio handles the session setup and secure tool access 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 cve.now 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.

When you connect a cve.now account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in cve.now 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 cve.now. If cve.now 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 cve.now 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 cve.now 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.

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

With Composio, you connect cve.now 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.

Start with cve.now MCP.It takes 30 seconds.

Managed auth, hosted MCP servers, and every cve.now MCP tool your agent needs.Free to start.

Start building