Folk

Folk is a lightweight, relationship-focused CRM for people who build their business on relationships. Folk's public REST API (versioned by date, base https://api.folk.app/v1, Bearer API key auth) lets you programmatically manage people, companies, groups, deals and other custom objects, notes, reminders, and interactions, and subscribe to real-time changes through webhooks. API access is a paid-plan feature.

Folk publishes 9 APIs on the APIs.io network, including Companies API, Deals API, Groups API, and 6 more. Tagged areas include CRM, Relationships, Contacts, Sales, and Pipeline.

Folk’s developer surface includes authentication, documentation, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.9/100 thin ▬ flat Agent 34/100 agent aware Full breakdown ↓
scored 2026-08-03 · rubric v0.9

AccessFreemiumOpenFree trial⚡ Free to try

9 APIs

CRMRelationshipsContactsSalesPipelineWebhooks

Kin Score

Kin Score How this is scored →
scored 2026-08-03 · rubric v0.9

Composite quality — 36.9/100 · thin

Contract Quality 14.5 / 25

Developer Ergonomics 4.3 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 2.7 / 13

Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 34/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/folk-app: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Folk Companies API

Company (organization) records.

Folk Deals API

Deals and other group-scoped custom objects.

Folk Groups API

Groups and their custom field definitions.

Folk Interactions API

Recorded interactions on the relationship timeline.

Folk Notes API

Free-form notes attached to contacts.

Folk People API

People (contacts) - the core relationship records in Folk.

Folk Reminders API

Dated follow-up reminders.

Folk Users API

Workspace users (members).

Folk Webhooks API

Real-time change-event subscriptions.

Scroll for all 9

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Folk External API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Folk App Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Folk App Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Folk App Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Folk App Authentication

http · 1 scheme

SECURITY

Folk App Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Folk App Agentic Access

39 operations · 22 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: folk-app
url: https://raw.githubusercontent.com/api-evangelist/folk-app/refs/heads/main/apis.yml
name: Folk
kind: company
description: Folk is a lightweight, relationship-focused CRM for people who build their business on relationships. Folk's
  public REST API (versioned by date, base https://api.folk.app/v1, Bearer API key auth) lets you programmatically manage
  people, companies, groups, deals and other custom objects, notes, reminders, and interactions, and subscribe to real-time
  changes through webhooks. API access is a paid-plan feature.
accessModel:
  pricing: freemium
  onboarding: open
  trial: true
  try_now: true
  public: true
  label: Freemium (free trial) · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/folk-app.png
tags:
- CRM
- Relationships
- Contacts
- Sales
- Pipeline
- Webhooks
created: '2026-07-02'
modified: '2026-07-02'
specificationVersion: '0.19'
apis:
- aid: folk-app:folk-app-companies-api
  name: Folk Companies API
  description: Company (organization) records.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/folk-app-companies-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-deals-api
  name: Folk Deals API
  description: Deals and other group-scoped custom objects.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Deals
  properties:
  - type: OpenAPI
    url: openapi/folk-app-deals-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-groups-api
  name: Folk Groups API
  description: Groups and their custom field definitions.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Groups
  properties:
  - type: OpenAPI
    url: openapi/folk-app-groups-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-interactions-api
  name: Folk Interactions API
  description: Recorded interactions on the relationship timeline.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Interactions
  properties:
  - type: OpenAPI
    url: openapi/folk-app-interactions-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-notes-api
  name: Folk Notes API
  description: Free-form notes attached to contacts.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Notes
  properties:
  - type: OpenAPI
    url: openapi/folk-app-notes-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-people-api
  name: Folk People API
  description: People (contacts) - the core relationship records in Folk.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - People
  properties:
  - type: OpenAPI
    url: openapi/folk-app-people-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-reminders-api
  name: Folk Reminders API
  description: Dated follow-up reminders.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Reminders
  properties:
  - type: OpenAPI
    url: openapi/folk-app-reminders-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-users-api
  name: Folk Users API
  description: Workspace users (members).
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/folk-app-users-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
- aid: folk-app:folk-app-webhooks-api
  name: Folk Webhooks API
  description: Real-time change-event subscriptions.
  humanURL: https://developer.folk.app/api-reference/people
  baseURL: https://api.folk.app/v1
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/folk-app-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/api-reference/introduction
  - type: APIReference
    url: https://developer.folk.app/api-reference/people
  - type: PostmanCollection
    url: collections/folk-app.postman_collection.json
  - type: OpenCollection
    url: collections/folk-app.opencollection.json
  - type: APIReference
    url: https://developer.folk.app/api-reference/companies
  - type: APIReference
    url: https://developer.folk.app/api-reference/deals
  - type: APIReference
    url: https://developer.folk.app/api-reference/groups
  - type: APIReference
    url: https://developer.folk.app/api-reference/notes
  - type: APIReference
    url: https://developer.folk.app/api-reference/reminders
  - type: APIReference
    url: https://developer.folk.app/api-reference/interactions
  - type: APIReference
    url: https://developer.folk.app/api-reference/users
  - type: APIReference
    url: https://developer.folk.app/api-reference/webhooks
common:
- type: AgenticAccess
  url: agentic-access/folk-app-agentic-access.yml
- type: DomainSecurity
  url: security/folk-app-domain-security.yml
- type: Authentication
  url: authentication/folk-app-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/folk-app
- type: Website
  url: https://www.folk.app
- type: Documentation
  url: https://developer.folk.app
- type: Plans
  url: plans/folk-app-plans-pricing.yml
- type: RateLimits
  url: rate-limits/folk-app-rate-limits.yml
- type: FinOps
  url: finops/folk-app-finops.yml
- url: https://www.folk.app/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Where this information came from

This is an independent, third-party profile of Folk, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.