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 API contracts indexed 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 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.8/100 thin ▬ flat Agent 53/100 agent ready Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 1 MCP Servers

CRM Contacts Pipelines Sales Relationships Notes Deals Webhook

What this lets a business do 3

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Customer Relationship Management

BC-420

CompaniesInteractionsNotesPeople

POST /v1/companies POST /v1/people POST /v1/interactions

Sales Management

BC-410

Deals

POST /v1/groups/{groupId}/{objectType}

Developer Platform & API Ecosystem Management

BC-4270

Webhooks

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 37.8/100 · thin

Contract Quality 12.5 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 2.8 / 15

Operational Transparency 2.6 / 10

Contract Governance 2.1 / 9

Discoverability 5.1 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 53/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agent Skills +5 pts — skills artifact present, graded by who authored it

4 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 18.4 — up to +16.3 composite points
Developer Ergonomics scores 23.8 — up to +15.2 composite points
Operational Transparency scores 26.3 — up to +9.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/folk/apis.yml: open an issue on github.com/api-evangelist/folk to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

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 10

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

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 10

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Folk MCP Server

Remote MCP server at mcp.folk.app over HTTP.

MCP SERVER

Folk API pricing

Not yet checked against Folk's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Standard paid	—
Premium paid	—
Enterprise enterprise	—

Plan details, limits and sources →

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

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Folk

SLA

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 — jsonschema 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 · 19 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 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

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: '2026-11-06'
  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'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
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: CapabilityMap
  url: capabilities/folk-capability-edges.yml
  name: Folk Business Capability Map
- 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

Folk API — frequently asked questions

Does Folk have an API?

Yes. APIs.io lists 9 APIs from Folk, including Folk Companies API, Folk Deals API and Folk Groups API, and 6 more.

Is there an OpenAPI specification for the Folk API?

Yes. APIs.io indexes 9 OpenAPI specifications for Folk, each linked for download from this page.

How do I authenticate with the Folk API?

Folk documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Folk Authentication.

How much does the Folk API cost?

APIs.io lists 3 pricing plans for Folk, with each plan's price, limits and inclusions under Pricing on this page.

Does Folk have an MCP server?

Yes. APIs.io lists 1 MCP server for Folk: Remote MCP server at mcp.folk.app over HTTP.

Is the Folk API ready for AI agents?

Folk has a Kin Score of 37.8 out of 100 (thin) and an Agent Readiness score of 53.2 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/folk"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/folk/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/folk/evidence"

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