name: Affinity
description: >-
  Affinity is a relationship intelligence CRM built for private equity, venture
  capital, and investment banking teams. It provides a REST API that enables
  developers to manage contacts, organizations, opportunities, lists, notes, and
  relationship timelines derived from email and calendar activity. The API is
  available in two versions: a legacy V1 with full read/write capabilities for
  persons, companies, opportunities, notes, interactions, reminders, and webhooks,
  and a modern V2 RESTful interface designed for internal apps, automated
  workflows, and third-party integrations. API access is included in the Scale,
  Advanced, and Enterprise subscription tiers, with monthly call limits ranging
  from 100,000 to unlimited depending on the plan.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/affinity/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.19'
type: Index
tags:
  - CRM
  - Relationship Intelligence
  - Private Equity
  - Venture Capital
  - Contacts
  - Organizations
  - Opportunities
  - Deal Management
apis:
  - name: Affinity API V1
    description: >-
      The legacy Affinity V1 API provides comprehensive read and write access to
      core CRM data including persons, organizations, opportunities, lists, notes,
      interactions, reminders, and webhooks. It uses HTTP Basic Auth or Bearer
      Auth with an API key obtained from the Affinity Settings dashboard.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://api-docs.affinity.co/
    baseURL: https://api.affinity.co
    tags:
      - CRM
      - Contacts
      - Organizations
      - Opportunities
      - Notes
      - Webhooks
    properties:
      - type: Documentation
        url: https://api-docs.affinity.co/
  - name: Affinity API V2
    description: >-
      The modern Affinity V2 API is a RESTful interface for building internal
      apps, automated workflows, and third-party integrations. It supports
      reading and writing data about people, companies, and opportunities, with
      Bearer Auth authentication. While not yet at full feature parity with V1,
      it is the actively developed version and includes a hosted MCP server
      integration for AI-powered workflows.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://developer.affinity.co/
    baseURL: https://api.affinity.co
    tags:
      - CRM
      - Contacts
      - Organizations
      - Opportunities
      - MCP
    properties:
      - type: Documentation
        url: https://developer.affinity.co/
      - type: OpenAPI
        url: openapi/affinity-v2-openapi.yml
common:
  - type: Website
    url: https://www.affinity.co/
  - type: Documentation
    url: https://developer.affinity.co/
  - type: GitHubOrg
    url: https://github.com/affinity
  - type: LinkedIn
    url: https://www.linkedin.com/company/project-affinity
  - type: Blog
    url: https://www.affinity.co/resources/blog
  - type: Pricing
    url: https://www.affinity.co/product/affinity-pricing
  - type: StatusPage
    url: https://status.affinity.co/
  - type: X
    url: https://x.com/affinity
  - type: Plans
    url: plans/affinity-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/affinity-rate-limits.yml
  - type: FinOps
    url: finops/affinity-finops.yml
  - type: Vocabulary
    url: vocabulary/affinity-vocabulary.yml
  - type: JSONLDContext
    url: json-ld/affinity-context.jsonld
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
aid: affinity