Folk

Folk is a collaborative CRM platform designed for agencies, investors, and sales teams who need to manage relationships at scale. It provides a REST API organized around predictable resource-oriented URLs, accepting and returning JSON-encoded payloads with standard HTTP response codes. The API enables developers to manage contacts (people and companies), pipelines and deals, notes, reminders, interactions, and custom fields programmatically. Webhooks are supported for real-time event notifications, and the platform integrates with 5,000+ tools including Gmail, Outlook, LinkedIn, WhatsApp, and Zapier. API access is available on the Premium and Enterprise plans.

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

The Folk catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Folk’s developer surface includes authentication, documentation, engineering blog, pricing, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

48.4/100 developing ▬ flat Agent 27/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaid

1 APIs

CRM Contacts Pipelines Sales Relationships Notes Deals Webhook

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 48.4/100 · developing

Contract Quality 17.1 / 23

Developer Ergonomics 4.3 / 18

Access Clarity 9.0 / 18

Operational Transparency 4.9 / 12

Contract Governance 2.7 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/folk: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 9

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

Folk Companies API

Operations related to companies.

Folk Deals API

Operations related to deals.

Folk Groups API

Operations related to groups.

Folk Interactions API

Operations related to interactions.

Folk Notes API

Operations related to notes.

Folk People API

Operations related to people.

Folk Reminders API

Operations related to reminders.

Folk Users API

Operations related to users.

Folk Webhooks API

Operations related to webhooks.

Scroll for all 9

Open Collections 11

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

API Collection

OPEN COLLECTION

Folk External API

OPEN COLLECTION

Folk External Companies API

OPEN COLLECTION

Folk External Companies Deals API

OPEN COLLECTION

Folk External Companies Groups API

OPEN COLLECTION

Folk External Companies Interactions API

OPEN COLLECTION

Folk External Companies Notes API

OPEN COLLECTION

Folk External Companies People API

OPEN COLLECTION

Folk External Companies Reminders API

OPEN COLLECTION

Folk External Companies Users API

OPEN COLLECTION

Folk External Companies Webhooks API

OPEN COLLECTION

Scroll for all 11

Pricing Plans 1

Published pricing tiers and plan structures.

Folk Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Folk Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Folk Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Folk Context

28 classes · 26 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Folk API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Folk API Schemas

0 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Folk Examples

1 fields

EXAMPLE

Security Posture 2

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

Folk Authentication

http · 1 scheme

SECURITY

Folk Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Folk 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

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Vocabulary

Vocabulary

JSONLDContext

JSONLDContext

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: folk
name: Folk
description: 'Folk is a collaborative CRM platform designed for agencies, investors, and sales teams who need to manage relationships
  at scale. It provides a REST API organized around predictable resource-oriented URLs, accepting and returning JSON-encoded
  payloads with standard HTTP response codes. The API enables developers to manage contacts (people and companies), pipelines
  and deals, notes, reminders, interactions, and custom fields programmatically. Webhooks are supported for real-time event
  notifications, and the platform integrates with 5,000+ tools including Gmail, Outlook, LinkedIn, WhatsApp, and Zapier. API
  access is available on the Premium and Enterprise plans.

  '
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/folk.png
url: https://raw.githubusercontent.com/api-evangelist/folk/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.23'
tags:
- CRM
- Contacts
- Pipelines
- Sales
- Relationships
- Notes
- Deals
- Webhook
tags_raw:
- CRM
- Contacts
- Pipelines
- Sales
- Relationships
- Notes
- Deals
- Webhooks
apis:
- aid: folk:folk-companies-api
  name: Folk Companies API
  description: Operations related to companies.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/folk-companies-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-deals-api
  name: Folk Deals API
  description: Operations related to deals.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Deals
  properties:
  - type: OpenAPI
    url: openapi/folk-deals-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-groups-api
  name: Folk Groups API
  description: Operations related to groups.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Group
  tags_raw:
  - Groups
  properties:
  - type: OpenAPI
    url: openapi/folk-groups-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-interactions-api
  name: Folk Interactions API
  description: Operations related to interactions.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Interactions
  properties:
  - type: OpenAPI
    url: openapi/folk-interactions-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-notes-api
  name: Folk Notes API
  description: Operations related to notes.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Notes
  properties:
  - type: OpenAPI
    url: openapi/folk-notes-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-people-api
  name: Folk People API
  description: Operations related to people.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - People
  properties:
  - type: OpenAPI
    url: openapi/folk-people-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-reminders-api
  name: Folk Reminders API
  description: Operations related to reminders.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Reminders
  properties:
  - type: OpenAPI
    url: openapi/folk-reminders-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-users-api
  name: Folk Users API
  description: Operations related to users.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/folk-users-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
- aid: folk:folk-webhooks-api
  name: Folk Webhooks API
  description: Operations related to webhooks.
  humanURL: https://developer.folk.app/
  baseURL: https://api.folk.app
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/folk-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developer.folk.app/
  - type: JSONSchema
    url: json-schema/folk-schemas.json
  - type: Examples
    url: examples/folk-examples.json
common:
- type: AgenticAccess
  url: agentic-access/folk-agentic-access.yml
- type: DomainSecurity
  url: security/folk-domain-security.yml
- type: Authentication
  url: authentication/folk-authentication.yml
- type: Website
  url: https://www.folk.app/
- type: Documentation
  url: https://developer.folk.app/
- type: GitHubOrg
  url: https://github.com/folk-js
- type: LinkedIn
  url: https://www.linkedin.com/company/folkhq/
- type: Blog
  url: https://www.folk.app/blog
- type: Pricing
  url: https://www.folk.app/pricing
- type: StatusPage
  url: https://status.folk.app/
- type: X
  url: https://twitter.com/FolkHQ
- type: Vocabulary
  url: vocabulary/folk-vocabulary.yml
- type: JSONLDContext
  url: json-ld/folk-context.jsonld
- type: Plans
  url: plans/folk-plans-pricing.yml
- type: RateLimits
  url: rate-limits/folk-rate-limits.yml
- type: FinOps
  url: finops/folk-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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