AI Native Marketstack Integration
- Supports both Marketstack MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for reading, writing, and querying your Marketstack data
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.SIGN UP
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.LOG IN
Marketstack MCP server for AI agents and assistants
Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Marketstack MCP or direct API to fetch real-time prices, look up historical quotes, analyze stock performance, and discover ticker information through natural language.
Api Key
Marketstack is a financial data API offering real-time, intraday, and historical stock data for 125,000+ tickers across 72+ global exchanges. Instantly access accurate market insights for trading, analytics, and research.
19 Tools
Try Marketstack now
Type what you want done — sign in and watch it run live in the Tool Router playground.
TOOL ROUTER PLAYGROUND
Marketstack
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TOOLS
Supported Tools
Every Marketstack action and event your agent gets out of the box.
SETUP GUIDE
Connect Marketstack MCP Tool with your Agent
1
Install Composio
typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openaiInstall 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: ["marketstack"],
mcp: true,
});Create a session scoped to Marketstack 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: "Get the latest price for AAPL stock.",
stopWhen: stepCountIs(10),
});
console.log(text);
await client.close();Pass the session's MCP URL and headers to your agent and run a Marketstack request
SETUP GUIDE
Connect Marketstack API Tool with your Agent
1
Install Composio
typescript
npm install @composio/core @composio/openai openaiInstall 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: ["marketstack"] });
const tools = await session.tools();Initialize Composio with the OpenAI Responses provider and create a session scoped to Marketstack
3
Run Marketstack tools with your agent
typescript
let response = await client.responses.create({
model: "gpt-5.6-sol",
tools,
input: [{ role: "user", content: "Get the latest price for AAPL stock." }],
});
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 Marketstack tool calls through the session, and print the final answer
Why Use Composio?
Managed Auth
- Built-in API key handling with secure storage
- Central place to manage, scope, and revoke Marketstack 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 Marketstack
- Scoped, least privilege access to Marketstack resources
- Full audit trail of agent actions to support review and compliance
FRAMEWORKS
Use Marketstack with any AI Agent Framework
Choose a Framework you want to connect Marketstack with
Claude Code
Use Marketstack MCP with Claude Code
Claude Cowork
Use Marketstack MCP with Claude Cowork
OpenAI Agents SDK
Use Marketstack MCP with OpenAI Agents SDK
Claude Agents SDK
Use Marketstack MCP with Claude Agents SDK
Codex
Use Marketstack MCP with Codex
OpenClaw
Use Marketstack MCP with OpenClaw
Hermes
Use Marketstack MCP with Hermes
Atomic Agent
Use Marketstack MCP with Atomic Agent
Google ADK
Use Marketstack MCP with Google ADK
Langchain
Use Marketstack MCP with Langchain
AI SDK
Use Marketstack MCP with AI SDK
Mastra AI
Use Marketstack MCP with Mastra AI
LlamaIndex
Use Marketstack MCP with LlamaIndex
CrewAI
Use Marketstack MCP with CrewAI
Pydantic AI
Use Marketstack MCP with Pydantic AI
Autogen
Use Marketstack MCP with Autogen
Rolling this out across your team?
Give your team centralized access control across every framework with Composio’s MCP Gateway.
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FAQ
Frequently asked questions
Yes, Marketstack 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 Marketstack 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 Marketstack account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Marketstack actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Marketstack at any time.
When you connect a Marketstack account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Marketstack 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 Marketstack. If Marketstack 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 Marketstack 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 Marketstack 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 Marketstack rejects the old key. Create a new key in Marketstack and reconnect the account from the Composio dashboard or by asking your agent to reconnect Marketstack. Nothing else changes.
Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Marketstack use. Paid plans add higher limits and team features. Your Marketstack 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 Marketstack accounts).
With Composio, you connect Marketstack 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 Marketstack.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Marketstack tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building