Affinity

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-images.s3.amazonaws.com/shared/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-images.s3.amazonaws.com/shared/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-images.s3.amazonaws.com/shared/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