Firebase MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Firebase MCP or direct API to discover projects, sign up users, sign in users, and refresh Secure Token sessions through natural language.

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Firebase is Google's app development platform for authentication, apps, and backend services. It helps teams ship secure user sign-in and account flows without building auth from scratch.

8 Tools

Try Firebase now

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 Firebase action and event your agent gets out of the box.

Discover Sign-In Methods

Look up sign-in methods previously used by a Firebase account email.

Get Auth Project Config

Get the public Firebase Authentication configuration associated with the connected Web API key, including the project ID and authorized domains.

Refresh ID Token

Exchange a Firebase refresh token for a fresh Firebase ID token and rotated refresh token using Google's Secure Token service.

Sign In With Custom Token

Exchange a trusted server-minted Firebase custom token for a Firebase ID token and refresh token.

Sign In With Email Link

Complete Firebase email-link sign-in using an email address and the one-time OOB code from a previously delivered sign-in link.

Sign In With Identity Provider

Sign in with one configured external identity provider using provider-specific OAuth or OIDC credential parameters.

Sign In With Password

Sign in an existing Firebase Authentication user with email and password and return fresh ID and refresh tokens.

Verify Password Reset Code

Validate a Firebase password-reset OOB code and identify the associated email and request type without changing the password.

SETUP GUIDE

Connect Firebase 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: ["firebase"],
  mcp: true,
});
Create a session scoped to Firebase 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: "Sign up a new Firebase Auth user with email test.user@example.com and password TestPass123!",
  stopWhen: stepCountIs(10),
});

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

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

Run Firebase tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Sign up a new Firebase Auth user with email test.user@example.com and password TestPass123!" }],
});

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

Why Use Composio?

AI Native Firebase Integration

  • Supports both Firebase MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable Firebase Auth tool execution
  • Rich coverage for project discovery, user sign-up, sign-in, out-of-band codes, and token refresh flows

Managed Auth

  • Store Firebase Web API keys securely instead of hard-coding them into agent prompts or app code
  • Central place to manage, scope, and revoke Firebase access across users and environments
  • Per user and per environment credentials so your agents can act safely in the right Firebase project

Agent Optimized Design

  • Firebase tools are designed so agents can understand the right auth flow to use, from sign-up to token refresh
  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know which Firebase action ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Firebase tools
  • Scoped, least privilege access to Firebase Authentication workflows
  • Full audit trail of agent actions to support review, debugging, and compliance
FAQ

Frequently asked questions

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

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

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

With Composio, you connect Firebase 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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