---

name: hubspot-integration description: "Build integrations with HubSpot CRM, Marketing Hub, and Sales Hub using REST APIs and webhooks. Covers contacts, deals, pipelines, email automation, and MCP server patterns for AI-driven CRM workflows." license: Apache 2.0 tags: ["hubspot", "crm", "marketing-automation", "api-integration", "sales", "mcp"] difficulty: intermediate time_to_master: "6-10 weeks" version: "1.0.0"

HubSpot Integration

Overview

HubSpot serves 200K+ customers across its CRM, Marketing, Sales, and Service Hubs. Unlike Salesforce's enterprise complexity, HubSpot offers a developer-friendly REST API with generous free-tier access, making it the most accessible CRM integration target. This skill covers authentication, core API operations, webhook handling, and AI agent integration patterns.

When to Use This Skill

• Building CRM-connected AI agents for sales or marketing automation
• Syncing contacts, deals, and activities between HubSpot and other systems
• Automating lead nurturing workflows with AI-powered personalization
• Creating MCP servers that expose HubSpot data to Claude or other LLMs
• Implementing real-time deal pipeline analytics

Core Concepts

HubSpot API Structure

Hub	Key Objects	API Endpoints
CRM	Contacts, Companies, Deals, Tickets	/crm/v3/objects/{objectType}
Marketing	Emails, Forms, Lists	/marketing/v3/
Sales	Meetings, Calls, Tasks, Quotes	/crm/v3/objects/
CMS	Pages, Blog posts, Files	/cms/v3/

Authentication

HubSpot supports two auth methods:

Method	Use Case	Token Lifetime
Private App Token	Server-to-server, internal tools	No expiry (revokable)
OAuth 2.0	Multi-tenant apps, marketplace	30 min (refresh available)

Object Model

Company (1) ──► (N) Contacts
    │                   │
    │                   ▼
    │              (N) Deals ──► Pipeline Stages
    │                   │
    ▼                   ▼
Activities         Line Items
(Calls, Emails,    (Products,
 Meetings, Notes)   Quoted prices)

Implementation Guide

Basic API Operations

import { Client } from "@hubspot/api-client";

const hubspot = new Client({ accessToken: process.env.HUBSPOT_TOKEN });

// Search contacts
const searchResponse = await hubspot.crm.contacts.searchApi.doSearch({
  filterGroups: [{
    filters: [{
      propertyName: "lifecyclestage",
      operator: "EQ",
      value: "lead",
    }],
  }],
  sorts: [{ propertyName: "createdate", direction: "DESCENDING" }],
  properties: ["firstname", "lastname", "email", "company", "lifecyclestage"],
  limit: 20,
});

// Create a deal
const deal = await hubspot.crm.deals.basicApi.create({
  properties: {
    dealname: "Acme Corp - Enterprise Plan",
    pipeline: "default",
    dealstage: "qualifiedtobuy",
    amount: "45000",
    closedate: "2026-06-30",
  },
  associations: [{
    to: { id: contactId },
    types: [{ associationCategory: "HUBSPOT_DEFINED", associationTypeId: 3 }],
  }],
});

MCP Server for HubSpot

server.tool(
  "search_hubspot_contacts",
  "Search HubSpot contacts by name, email, company, or lifecycle stage",
  {
    query: z.string().describe("Search term"),
    lifecycleStage: z.enum(["subscriber", "lead", "marketingqualifiedlead",
      "salesqualifiedlead", "opportunity", "customer"]).optional(),
    limit: z.number().default(10),
  },
  async ({ query, lifecycleStage, limit }) => {
    const filters = [{ propertyName: "hs_searchable_calculated_phone_number_country_code", operator: "HAS_PROPERTY" }];
    // Build filters from query and lifecycleStage
    const results = await hubspot.crm.contacts.searchApi.doSearch({
      query,
      filterGroups: lifecycleStage ? [{
        filters: [{ propertyName: "lifecyclestage", operator: "EQ", value: lifecycleStage }],
      }] : [],
      properties: ["firstname", "lastname", "email", "company", "lifecyclestage", "hs_lead_status"],
      limit,
    });

    return {
      content: [{
        type: "text",
        text: results.results.map(c => 
          `${c.properties.firstname} ${c.properties.lastname} | ${c.properties.email} | ${c.properties.company} | Stage: ${c.properties.lifecyclestage}`
        ).join("\n"),
      }],
    };
  }
);

server.tool(
  "get_deal_pipeline",
  "Get deals in a pipeline stage with amounts and close dates",
  {
    stage: z.string().describe("Pipeline stage name"),
    minAmount: z.number().optional(),
  },
  async ({ stage, minAmount }) => {
    const filters = [
      { propertyName: "dealstage", operator: "EQ", value: stage },
    ];
    if (minAmount) {
      filters.push({ propertyName: "amount", operator: "GTE", value: String(minAmount) });
    }

    const results = await hubspot.crm.deals.searchApi.doSearch({
      filterGroups: [{ filters }],
      properties: ["dealname", "amount", "dealstage", "closedate", "pipeline"],
      sorts: [{ propertyName: "amount", direction: "DESCENDING" }],
      limit: 20,
    });

    const total = results.results.reduce((sum, d) => sum + Number(d.properties.amount || 0), 0);
    return {
      content: [{
        type: "text",
        text: `Pipeline Stage: ${stage} | ${results.total} deals | Total: ${total.toLocaleString()}\n\n` +
          results.results.map(d =>
            `- ${d.properties.dealname}: ${Number(d.properties.amount).toLocaleString()} (Close: ${d.properties.closedate})`
          ).join("\n"),
      }],
    };
  }
);

Webhook Processing

import crypto from "crypto";

function verifyHubSpotWebhook(req, clientSecret) {
  const signature = req.headers["x-hubspot-signature-v3"];
  const timestamp = req.headers["x-hubspot-request-timestamp"];

  // Reject if timestamp > 5 minutes old
  if (Date.now() - Number(timestamp) > 300000) return false;

  const sourceString = `${req.method}${req.url}${JSON.stringify(req.body)}${timestamp}`;
  const hash = crypto.createHmac("sha256", clientSecret).update(sourceString).digest("base64");
  return crypto.timingSafeEqual(Buffer.from(hash), Buffer.from(signature));
}

Rate Limits

Tier	Limit	Burst
Free	100 calls/10 sec	110
Starter	100 calls/10 sec	110
Professional	150 calls/10 sec	160
Enterprise	200 calls/10 sec	200

Daily limit: 250,000 calls for free/starter; 500,000 for pro/enterprise.

Best Practices

1. Use the official Node.js client (@hubspot/api-client) over raw HTTP
2. Batch API calls — use /batch/read and /batch/create for multiple records
3. Implement retry logic for 429 (rate limit) responses with Retry-After header
4. Use search API over list — search supports filters, sorting, and pagination efficiently
5. Subscribe to webhooks for real-time sync instead of polling
6. Cache property definitions — custom properties rarely change; fetch once and cache

Resources

• HubSpot API Documentation
• HubSpot Node.js Client
• HubSpot Developer Portal

Changelog

Version	Date	Changes
1.0.0	2026-03-31	Initial documentation