TheirStack MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with TheirStack MCP or direct API to search job postings, analyze company hiring signals, inspect tech stacks, and enrich sales or recruiting workflows through natural language.

TheirStack logoTheirStack
Api Key

TheirStack is a job posting, company, and technographic data platform. It helps teams find hiring signals, market trends, and account intelligence faster.

10 Tools

Try TheirStack now

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

TOOL ROUTER PLAYGROUND
TheirStack
Try asking
TOOLS

Supported Tools

Every TheirStack action and event your agent gets out of the box.

Get Credit Balance

Return the connected team's API/UI credit allowances, cumulative usage, and earliest expiration so an agent can budget credit-consuming searches.

Get Credit Consumption

Return daily API and UI credit consumption for an optional time range and timezone to monitor usage trends.

List Company Lists

List company lists available to the connected team, including IDs and company counts, without modifying list membership.

List Datasets

List TheirStack dataset families and whether the connected team is entitled to each one.

List Saved Searches

List saved searches available to the connected team without creating, updating, archiving, or unsubscribing anything.

Search Companies

Search companies by durable identifiers and firmographic, industry, funding, or technology filters.

Search Industries

Find industry names and IDs for company and job filters.

Search Jobs

Search current and historical jobs using a required posting-date or company filter, optionally refined by title, location, seniority, salary, industry, or technology.

Search Keywords

Find TheirStack technology and other semantic keyword slugs.

Search Locations

Resolve place names or country and feature filters to TheirStack location IDs for precise job searches.

SETUP GUIDE

Connect TheirStack 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: ["theirstack"],
  mcp: true,
});
Create a session scoped to TheirStack 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: "Find companies in the United States hiring senior data engineers using Snowflake",
  stopWhen: stepCountIs(10),
});

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

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

Run TheirStack tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Find companies in the United States hiring senior data engineers using Snowflake" }],
});

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

Why Use Composio?

AI Native TheirStack Integration

  • Supports both TheirStack MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable job, company, and technographic queries
  • Rich coverage for finding hiring signals, researching companies, and powering sales or recruiting workflows

Managed Auth

  • Secure API key handling without hard-coding TheirStack credentials in your agent code
  • Central place to manage, scope, and revoke TheirStack access
  • Per user and per environment credentials for safer sales intelligence and recruiting workflows

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know which TheirStack searches ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access TheirStack
  • Scoped, least privilege access to TheirStack data and enrichment actions
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

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

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

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

With Composio, you connect TheirStack 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 TheirStack.It takes 30 seconds.

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

Start building