How to connect Affinity to Claude

Connect Claude Web, Desktop and Cowork to Affinity MCP. List all companies added this week, show all opportunities in active pipeline, and more using natural language, with authentication handled for you.

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Api Key

Affinity is a relationship intelligence CRM that helps private capital investors find, manage, and close more deals. It streamlines deal flow and surfaces key connections to help you win opportunities.

20 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Affinity account to Claude via Composio Connect, enabling it to list all companies added this week, show all opportunities in active pipeline, get recent contacts linked to Acme Corp, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Affinity with

Connecting Affinity to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Affinity account

Back in Claude, ask it to connect to Affinity or give it any Affinity-related task.

For example, ask Claude to:

  • "List all companies added this week"
  • "Show all opportunities in active pipeline"
  • "Get recent contacts linked to Acme Corp"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Affinity account is ready to use.

What is the Affinity Claude Connector, and what's possible with it?

The Affinity MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Affinity account. It provides structured and secure access to your deal, company, and contact data, so your agent can analyze lists, fetch opportunity details, extract company insights, and organize people or organizations on your behalf.

  • Company data extraction and analysis: Let your agent retrieve detailed company profiles, summarize list entries, and pull custom field data for deeper insights and reporting.
  • Opportunity pipeline management: Automatically fetch and review all ongoing opportunities, track changes, and surface high-priority deals for follow-up.
  • List and view organization: Ask your agent to access entries across lists or saved views, aggregating metadata and field values for efficient CRM workflows.
  • Contact and relationship intelligence: Effortlessly browse, analyze, and summarize person records, including their list memberships, activity, and custom fields.
  • Automated CRM reporting: Generate summaries, export data, and monitor changes across companies, people, and opportunities to keep your pipeline up-to-date and actionable.

Troubleshooting

1. Why does Claude not use the Composio connector for Affinity?

The connector can show as connected, but Claude must use it in each Affinity conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Affinity again.

2. Why does Claude show an MCP server error before Affinity connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Affinity.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Affinity.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Affinity authorization link not work?

The Composio connector is one server. Your Affinity account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Affinity connection.
  • Composio creates a fresh Affinity authorization link.
  • Open that link in your browser and finish the Affinity sign-in.

4. Why do Affinity actions fail after they worked before?

The Affinity connection can expire or lose permission.

  • Ask Claude to inspect the Affinity connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Affinity account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Affinity.
  • If the action still fails with a permission error, check that the connected account has that permission in Affinity itself.

5. How do I switch to a different Affinity account?

Claude can manage the Affinity connection for you.

  • Ask Claude to disconnect or delete the current Affinity account.
  • Ask Claude to connect Affinity again.
  • Open the new Composio authorization link for Affinity.
  • Sign in with the other Affinity account in the browser.
  • After the account connects, ask Claude to retry the Affinity task.

6. Why is my Affinity connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Affinity connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click and click Clear cache.
  • If Affinity tools still do not appear, click , disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Affinity.
TOOLS

Supported Tools

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

Get a company s list entries

Summarize company data across all lists, including list-specific fields and metadata like creation date and author.

Get a company s lists

Returns metadata for all the Lists on which the given Company appears.

Get all companies

Affinity API allows paginated access to company info and custom fields.

Get all list entries on a list

Access and export essential data and metadata for Companies, Persons, or Opportunities from a List, specifying data via `fieldIds` or `fieldTypes`.

Get all list entries on a saved view

Use the endpoint to access rows in a Saved View with specific filters and selected fields from a web app.

Get all opportunities

Pagination through Opportunities in Affinity yields basic info but excludes field data.

Get all persons

The Affinity API offers paginated access to Person data using `fieldIds` or `fieldTypes`.

Get a person s list entries

Summary: Browse rows for a Person in all Lists, showing field data and entry metadata like creation time and author.

Get a person s lists

Returns metadata for all the Lists on which the given Person appears.

Get a single company

Retrieve basic company info and specific field data by using `fieldIds` or `fieldTypes` parameters.

Get a single opportunity

Get basic details about an Opportunity without field data via provided endpoints.

Get a single person

Use GET `/v2/persons/fields` with `fieldIds` or `fieldTypes` for detailed data; basic info by default.

Get current user

Returns metadata about the current user.

Get metadata on all lists

Returns metadata on Lists.

Get metadata on a single list

Returns metadata on a single List.

Get metadata on a single list s fields

Returns metadata on the Fields available on a single List.

Get metadata on a single saved view

Returns metadata on a single Saved View.

Get metadata on company fields

Returns metadata on non-list-specific Company Fields.

Get metadata on person fields

Returns metadata on non-list-specific Person Fields.

Get metadata on saved views

Returns metadata on the Saved Views on a List.

FAQ

Frequently asked questions

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

Yes, you can. Claude Cowork 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 Affinity tools.

Yes, absolutely. You can configure which Affinity 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.

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 Affinity data and credentials are handled as safely as possible.

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