Affinity MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Affinity MCP or direct API to track deals, update pipelines, search contacts, and automate investor outreach through natural language.

Affinity logoAffinity
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

Try Affinity now

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

TOOL ROUTER PLAYGROUND
Affinity
Try asking
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.

SETUP GUIDE

Connect Affinity 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: ["affinity"],
  mcp: true,
});
Create a session scoped to Affinity 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: "List all companies added this week",
  stopWhen: stepCountIs(10),
});

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

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

Run Affinity tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "List all companies added this week" }],
});

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

Why Use Composio?

AI Native Affinity Integration

  • Supports both Affinity MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Affinity data

Managed Auth

  • Built-in API key management—no more hardcoding secrets
  • Central place to manage, scope, and revoke Affinity 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 Affinity
  • Scoped, least privilege access to Affinity resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Affinity 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.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Start with Affinity.It takes 30 seconds.

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

Start building