How to integrate Api ninjas MCP with Pydantic AI

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Introduction

This guide walks you through connecting Api ninjas to Pydantic AI using the Composio tool router. By the end, you'll have a working Api ninjas agent that can get real-time bitcoin price and market data, check if this email is disposable, look up bank info for this bin through natural language commands.

This guide will help you understand how to give your Pydantic AI agent real control over a Api ninjas account through Composio's Api ninjas MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

Also integrate Api ninjas with

TL;DR

Here's what you'll learn:
  • How to set up your Composio API key and User ID
  • How to create a Composio Tool Router session for Api ninjas
  • How to attach an MCP Server to a Pydantic AI agent
  • How to stream responses and maintain chat history
  • How to build a simple REPL-style chat interface to test your Api ninjas workflows

What is Pydantic AI?

Pydantic AI is a Python framework for building AI agents with strong typing and validation. It leverages Pydantic's data validation capabilities to create robust, type-safe AI applications.

Key features include:

  • Type Safety: Built on Pydantic for automatic data validation
  • MCP Support: Native support for Model Context Protocol servers
  • Streaming: Built-in support for streaming responses
  • Async First: Designed for async/await patterns

What is the Api ninjas MCP server, and what's possible with it?

The Api ninjas MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Api ninjas account. It provides structured and secure access to a wide array of real-time data APIs, so your agent can perform actions like fetching financial data, generating barcodes, validating emails, and looking up domains on your behalf.

  • Fetch live financial and crypto data: Instantly retrieve up-to-date prices for stocks, commodities, ETFs, and cryptocurrencies, or access earnings calendars and transcripts for informed decision-making.
  • Barcode generation on demand: Have your agent create barcode images for custom data or text, perfect for inventory, tickets, or quick sharing of encoded information.
  • Email validation and security checks: Automatically check if an email address is disposable or risky before engaging users or sending communications.
  • Bank and payment info lookup: Look up bank details using BIN numbers, helping with payment processing, fraud detection, or financial analysis.
  • Domain and DNS diagnostics: Let your agent perform DNS lookups to fetch domain records, aiding in troubleshooting or technical audits quickly and efficiently.

Supported Tools & Triggers

Tools
Analyze Text SentimentTool to analyze the sentiment of text.
Generate Barcode ImageTool to generate a barcode image for specified text.
BIN LookupTool to look up bank information from a Bank Identification Number.
Get Bitcoin Price and Market DataTool to retrieve the latest Bitcoin price and 24-hour market data.
Calculate Calories BurnedTool to calculate calories burned for an activity based on duration and body weight.
Calculate MortgageTool to calculate mortgage payments and breakdowns.
Calculate Sales TaxTool to calculate sales tax for a purchase amount at a US location.
Check Domain AvailabilityTool to check domain availability and retrieve registration information.
Check If Date Is Public HolidayTool to check if a specific date is a public holiday in a given country.
Check If Date Is Working DayTool to check if a date is a working day in a specific country.
Check SpellingTool to check spelling and get corrections for text.
Commodity PriceGet real-time commodity prices from major exchanges (CME, NYMEX, COMEX).
Compute Text SimilarityTool to compute semantic similarity between two texts.
Convert CurrencyConvert between currencies using current exchange rates.
Convert UnitConvert between measurement units across different categories.
Crypto PriceGet the current real-time price for a cryptocurrency trading pair.
Detect Text LanguageTool to detect the language of input text.
Check Disposable EmailTool to check whether an email address is from a disposable email provider.
DNS LookupTool to retrieve DNS records for a specified domain.
Earnings CalendarFetches historical earnings data (EPS and revenue - actual vs.
Earnings Call TranscriptRetrieve the full earnings call transcript for a publicly traded company.
ETF InfoRetrieve detailed information about an Exchange-Traded Fund (ETF) by its ticker symbol.
Extract Webpage ContentTool to extract main content and metadata from a webpage.
Filter Profanity from TextTool to detect and censor profanity in text.
Find EV Charging StationsTool to find electric vehicle charging stations near a specified location.
Generate Lorem Ipsum TextTool to generate Lorem Ipsum placeholder text.
Generate Secure PasswordTool to generate secure random passwords with configurable length and character types.
Generate QR CodeTool to generate QR code images for encoding data.
Generate Random User ProfilesTool to generate fake random user profiles with realistic data.
Generate Sudoku PuzzleTool to generate a new Sudoku puzzle with a specified difficulty level.
Generate Text EmbeddingsTool to encode text into vector embeddings using NLP models.
Generate User Agent StringTool to generate realistic random user agent strings with optional filters for brand, model, OS, and browser.
Get Random Life AdviceTool to get a random piece of life advice from the API Ninjas Advice endpoint.
Get Aircraft InformationTool to retrieve aircraft information by manufacturer and model including specifications and performance data.
Get Airline InformationTool to retrieve airline information by name, IATA code, or ICAO code.
Get Airport InformationTool to search for airport information by IATA code, ICAO code, name, city, country, or region.
Get Air Quality DataTool to retrieve air quality index and pollutant data for a location.
Get Animal InformationTool to retrieve detailed scientific information about animal species including taxonomy, habitat, diet, and physical characteristics.
Get Baby NamesTool to get baby name suggestions by gender.
Get Random Bucket List IdeaTool to retrieve a random bucket list idea or activity.
Get Cat Breed InformationTool to retrieve information on cat breeds matching specified parameters.
Get Celebrity InformationTool to search for celebrity information by name or other criteria.
Get Chuck Norris JokeTool to retrieve a random Chuck Norris joke from the API Ninjas database.
Get City InformationTool to retrieve city information by name, country, coordinates, or population filters.
Get Cocktail RecipesTool to search for cocktail recipes by name or ingredients.
Get Company LogoTool to retrieve company logo images by company name or ticker symbol.
Get and Increment CounterTool to get and optionally increment a persistent counter.
Get Country Flag SVGTool to retrieve country flag images in SVG format.
Get Country InformationTool to retrieve detailed country information by name, ISO code, or filtering by economic and demographic criteria.
Get County InformationTool to retrieve US county information by name, ZIP code, or state.
Get Random Dad JokesTool to retrieve random dad jokes from API Ninjas.
Get Day in History EventsTool to get historical events for a specific date.
Get Dictionary DefinitionTool to retrieve dictionary definition for an English word.
Get Dog Breed InformationTool to get information on dog breeds matching specified parameters.
Get EarningsTool to retrieve comprehensive earnings report data for publicly traded companies.
Get Electric Vehicle InfoGet electric vehicle information by make, model, year range, or electric range.
Get Emoji InformationTool to retrieve emoji information and images from the API Ninjas Emoji database.
Get Exchange RateGet the current exchange rate for a currency pair.
Get ExercisesTool to get exercise information by muscle group, type, or difficulty level.
Get Fact of the DayTool to retrieve the fact of the day from API Ninjas.
Get Random FactsTool to retrieve random interesting facts from API Ninjas.
Get GDP DataTool to get GDP data for a country.
Convert City to CoordinatesTool to convert city names to geographic coordinates (forward geocoding).
Get Helicopter InformationTool to get helicopter information by manufacturer, model, and specifications.
Get Historical EventsTool to retrieve historical events by date or keywords.
Get Historical FiguresTool to search for historical figures by name.
Get Random Hobby SuggestionsTool to get random hobby suggestions from API Ninjas.
Get HolidaysTool to retrieve holidays for a specific country and year.
Get Daily HoroscopeTool to get daily horoscope for a zodiac sign.
Get Hospital InformationTool to retrieve hospital information by name, location, or geographic coordinates.
Income TaxGet current and historical income tax bracket rates for a country by year.
Get Insider TransactionsTool to get insider trading transactions for publicly traded companies.
Get IP GeolocationTool to retrieve geolocation information for an IP address.
Get Joke of the DayTool to retrieve the joke of the day from API Ninjas.
Get Random JokesTool to retrieve random jokes from API Ninjas.
Get Motorcycle SpecificationsTool to get detailed motorcycle specifications by make, model, and year.
Get Mutual Fund InfoTool to get mutual fund information by ticker.
Get MX RecordsTool to retrieve MX (Mail Exchange) records for a specified domain.
Get Planet InformationTool to retrieve detailed information about planets and exoplanets including mass, radius, orbital period, temperature, and host star data.
Get Population DataTool to get population data for a country.
Get Postal Code Location InfoTool to retrieve location information for Canadian postal codes.
Get Property Tax RatesTool to get property tax rates by city, county, or ZIP code.
Get Public HolidaysTool to retrieve official public holidays for a specific country and year.
Get Quote of the DayTool to retrieve the quote of the day from API Ninjas.
Get Random QuotesTool to get random quotes from famous people, filtered by category or author.
Get Random ImageTool to get a random image by category from API Ninjas.
Get Random QuotesTool to retrieve random quotes from API Ninjas.
Get Random WordTool to get a random English word from the API Ninjas Random Word endpoint.
Get RecipeTool to search for recipes by title or ingredients from a database of over 200,000 recipes.
Convert Coordinates to LocationTool to convert geographic coordinates to location information (reverse geocoding).
Get Rhyming WordsTool to get words that rhyme with a given word.
Get Random RiddlesTool to retrieve random riddles with answers from API Ninjas.
Get Sales Tax RatesTool to get sales tax rates by ZIP code or city and state.
Get SEC FilingTool to retrieve SEC filing information for publicly traded companies.
Get S&P 500 ConstituentsTool to retrieve current S&P 500 index constituents with filtering by ticker, name, sector, or date added.
Get Star InformationTool to retrieve detailed information about stars including name, constellation, coordinates, magnitude, distance, and spectral classification.
Get Stock Exchange InformationTool to retrieve stock exchange information by Market Identifier Code (MIC), name, city, or country.
Get Stock PriceTool to get current stock price data for any publicly traded company or index.
Get SWIFT CodeTool to get bank information from SWIFT code or search by bank name, city, or country.
Get ThesaurusTool to get synonyms and antonyms for an English word.
Get TickerTool to retrieve comprehensive company profile information for publicly traded companies by stock ticker symbol.
Get Timezone InformationTool to get timezone information for a location including UTC offset, local time, and timezone name.
Get Trivia QuestionsTool to retrieve trivia questions by category from API Ninjas.
Get Trivia of the DayTool to retrieve the trivia question of the day from API Ninjas.
Get Unemployment RateTool to get unemployment rate data for countries.
Get University InformationTool to retrieve university information by name or country.
Get URL Location InfoTool to get location information for a URL domain.
Get Current WeatherTool to retrieve current weather data for a location.
Get Weather ForecastTool to retrieve 5-day weather forecast in 3-hour intervals for a location.
Get WHOIS InformationTool to get WHOIS domain registration information including registrar, creation date, and expiration date.
Get Working DaysTool to get working days for a specific country and time period.
Get World TimeTool to get current date and time for a location with detailed date/time components.
Get US Zipcode Location InfoTool to retrieve location information for US zip codes.
IBAN LookupTool to look up and validate an International Bank Account Number (IBAN).
Income Tax CalculatorTool to calculate income taxes for US and Canada.
Get Inflation DataTool to get current inflation data for a country.
Interest RateTool to get current interest rates for central banks and benchmarks.
List Stock TickersTool to retrieve a paginated list of all available stock ticker symbols and company names.
VIN LookupTool to decode Vehicle Identification Number (VIN) and retrieve vehicle information.
Market CapTool to get real-time market cap data for a company.
Mortgage RateTool to get current and historical mortgage rates.
Extract Nutrition InformationTool to extract nutrition information from text query.
Scrape Website ContentTool to scrape HTML content from a URL using the API Ninjas Webscraper endpoint.
Solve Sudoku PuzzleTool to solve a Sudoku puzzle using the API Ninjas Sudoku Solver.
Validate EmailTool to validate email address format and check deliverability.
Validate EU VATTool to retrieve and validate EU VAT (Value Added Tax) rates by country code.
Validate Phone NumberTool to validate and format phone numbers.
Validate Routing NumberTool to validate and retrieve bank information from a routing number.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Prerequisites

Before starting, make sure you have:
  • Python 3.9 or higher
  • A Composio account with an active API key
  • Basic familiarity with Python and async programming

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.

Install dependencies

bash
pip install composio pydantic-ai python-dotenv

Install the required libraries.

What's happening:

  • composio connects your agent to external SaaS tools like Api ninjas
  • pydantic-ai lets you create structured AI agents with tool support
  • python-dotenv loads your environment variables securely from a .env file

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
OPENAI_API_KEY=your_openai_api_key

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates your agent to Composio's API
  • USER_ID associates your session with your account for secure tool access
  • OPENAI_API_KEY to access OpenAI LLMs

Import dependencies

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()
What's happening:
  • We load environment variables and import required modules
  • Composio manages connections to Api ninjas
  • MCPServerStreamableHTTP connects to the Api ninjas MCP server endpoint
  • Agent from Pydantic AI lets you define and run the AI assistant

Create a Tool Router Session

python
async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Api ninjas
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["api_ninjas"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")
What's happening:
  • We're creating a Tool Router session that gives your agent access to Api ninjas tools
  • The create method takes the user ID and specifies which toolkits should be available
  • The returned session.mcp.url is the MCP server URL that your agent will use

Initialize the Pydantic AI Agent

python
# Attach the MCP server to a Pydantic AI Agent
api_ninjas_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
agent = Agent(
    "openai:gpt-5",
    toolsets=[api_ninjas_mcp],
    instructions=(
        "You are a Api ninjas assistant. Use Api ninjas tools to help users "
        "with their requests. Ask clarifying questions when needed."
    ),
)
What's happening:
  • The MCP client connects to the Api ninjas endpoint
  • The agent uses GPT-5 to interpret user commands and perform Api ninjas operations
  • The instructions field defines the agent's role and behavior

Build the chat interface

python
# Simple REPL with message history
history = []
print("Chat started! Type 'exit' or 'quit' to end.\n")
print("Try asking the agent to help you with Api ninjas.\n")

while True:
    user_input = input("You: ").strip()
    if user_input.lower() in {"exit", "quit", "bye"}:
        print("\nGoodbye!")
        break
    if not user_input:
        continue

    print("\nAgent is thinking...\n", flush=True)

    async with agent.run_stream(user_input, message_history=history) as stream_result:
        collected_text = ""
        async for chunk in stream_result.stream_output():
            text_piece = None
            if isinstance(chunk, str):
                text_piece = chunk
            elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                text_piece = chunk.delta
            elif hasattr(chunk, "text"):
                text_piece = chunk.text
            if text_piece:
                collected_text += text_piece
        result = stream_result

    print(f"Agent: {collected_text}\n")
    history = result.all_messages()
What's happening:
  • The agent reads input from the terminal and streams its response
  • Api ninjas API calls happen automatically under the hood
  • The model keeps conversation history to maintain context across turns

Run the application

python
if __name__ == "__main__":
    asyncio.run(main())
What's happening:
  • The asyncio loop launches the agent and keeps it running until you exit

Complete Code

Here's the complete code to get you started with Api ninjas and Pydantic AI:

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()

async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Api ninjas
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["api_ninjas"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")

    # Attach the MCP server to a Pydantic AI Agent
    api_ninjas_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
    agent = Agent(
        "openai:gpt-5",
        toolsets=[api_ninjas_mcp],
        instructions=(
            "You are a Api ninjas assistant. Use Api ninjas tools to help users "
            "with their requests. Ask clarifying questions when needed."
        ),
    )

    # Simple REPL with message history
    history = []
    print("Chat started! Type 'exit' or 'quit' to end.\n")
    print("Try asking the agent to help you with Api ninjas.\n")

    while True:
        user_input = input("You: ").strip()
        if user_input.lower() in {"exit", "quit", "bye"}:
            print("\nGoodbye!")
            break
        if not user_input:
            continue

        print("\nAgent is thinking...\n", flush=True)

        async with agent.run_stream(user_input, message_history=history) as stream_result:
            collected_text = ""
            async for chunk in stream_result.stream_output():
                text_piece = None
                if isinstance(chunk, str):
                    text_piece = chunk
                elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                    text_piece = chunk.delta
                elif hasattr(chunk, "text"):
                    text_piece = chunk.text
                if text_piece:
                    collected_text += text_piece
            result = stream_result

        print(f"Agent: {collected_text}\n")
        history = result.all_messages()

if __name__ == "__main__":
    asyncio.run(main())

Conclusion

You've built a Pydantic AI agent that can interact with Api ninjas through Composio's Tool Router. With this setup, your agent can perform real Api ninjas actions through natural language. You can extend this further by:
  • Adding other toolkits like Gmail, HubSpot, or Salesforce
  • Building a web-based chat interface around this agent
  • Using multiple MCP endpoints to enable cross-app workflows (for example, Gmail + Api ninjas for workflow automation)
This architecture makes your AI agent "agent-native", able to securely use APIs in a unified, composable way without custom integrations.

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FAQ

What are the differences in Tool Router MCP and Api ninjas MCP?

With a standalone Api ninjas MCP server, the agents and LLMs can only access a fixed set of Api ninjas tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Api ninjas and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Pydantic AI?

Yes, you can. Pydantic AI fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Api ninjas tools.

Can I manage the permissions and scopes for Api ninjas while using Tool Router?

Yes, absolutely. You can configure which Api ninjas scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Api ninjas data and credentials are handled as safely as possible.

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