Capsule

Capsule is a CRM and project-management platform for small and mid-sized businesses that unifies contacts, sales pipelines, tasks, cases, and projects. The Capsule REST API exposes parties (contacts and companies), opportunities, projects, tasks, cases, entries, tracks, and settings such as tags, pipelines, milestones, stages, and custom fields, with REST Hooks webhooks for event-driven integration.

Capsule publishes 4 APIs on the APIs.io network, including Opportunities API, Parties API, Projects API, and 1 more. Tagged areas include Contact Management, CRM, Custom Fields, Opportunities, and Pipelines.

Capsule’s developer surface includes authentication, documentation, pricing, support, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.5/100 developing ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

4 APIs

Contact ManagementCRMCustom FieldsOpportunitiesPipelinesProject ManagementRESTSalesTasksWebhooks

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 42.5/100 · developing

Contract Quality 12.5 / 25

Developer Ergonomics 5.2 / 20

Commercial Clarity 14.2 / 20

Operational Transparency 4.1 / 13

Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 31/100 · 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/capsule: 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 4

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

Rate Limits 1

Documented rate limits and quota policies.

Capsule Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

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

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: capsule
url: https://raw.githubusercontent.com/api-evangelist/capsule/refs/heads/main/apis.yml
name: Capsule
description: Capsule is a CRM and project-management platform for small and mid-sized businesses that unifies contacts, sales
  pipelines, tasks, cases, and projects. The Capsule REST API exposes parties (contacts and companies), opportunities, projects,
  tasks, cases, entries, tracks, and settings such as tags, pipelines, milestones, stages, and custom fields, with REST Hooks
  webhooks for event-driven integration.
type: Index
kind: company
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/capsule.png
tags:
- Contact Management
- CRM
- Custom Fields
- Opportunities
- Pipelines
- Project Management
- REST
- Sales
- Tasks
- Webhooks
created: '2025-01-01'
modified: '2026-04-23'
specificationVersion: '0.19'
apis:
- aid: capsule:capsule-opportunities-api
  name: Capsule Opportunities API
  description: The Opportunities API from Capsule — 7 operation(s) for opportunities.
  humanURL: https://developer.capsulecrm.com/
  tags:
  - Opportunities
  properties:
  - type: OpenAPI
    url: openapi/capsule-opportunities-api-openapi.yml
  - type: Documentation
    url: https://developer.capsulecrm.com/
  - type: Authentication
    url: https://developer.capsulecrm.com/v2/overview/authentication
  - type: Webhooks
    url: https://developer.capsulecrm.com/v2/resources/rest-hooks
- aid: capsule:capsule-parties-api
  name: Capsule Parties API
  description: The Parties API from Capsule — 5 operation(s) for parties.
  humanURL: https://developer.capsulecrm.com/
  tags:
  - Parties
  properties:
  - type: OpenAPI
    url: openapi/capsule-parties-api-openapi.yml
  - type: Documentation
    url: https://developer.capsulecrm.com/
  - type: Authentication
    url: https://developer.capsulecrm.com/v2/overview/authentication
  - type: Webhooks
    url: https://developer.capsulecrm.com/v2/resources/rest-hooks
- aid: capsule:capsule-projects-api
  name: Capsule Projects API
  description: The Projects API from Capsule — 5 operation(s) for projects.
  humanURL: https://developer.capsulecrm.com/
  tags:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/capsule-projects-api-openapi.yml
  - type: Documentation
    url: https://developer.capsulecrm.com/
  - type: Authentication
    url: https://developer.capsulecrm.com/v2/overview/authentication
  - type: Webhooks
    url: https://developer.capsulecrm.com/v2/resources/rest-hooks
- aid: capsule:capsule-tasks-api
  name: Capsule Tasks API
  description: The Tasks API from Capsule — 2 operation(s) for tasks.
  humanURL: https://developer.capsulecrm.com/
  tags:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/capsule-tasks-api-openapi.yml
  - type: Documentation
    url: https://developer.capsulecrm.com/
  - type: Authentication
    url: https://developer.capsulecrm.com/v2/overview/authentication
  - type: Webhooks
    url: https://developer.capsulecrm.com/v2/resources/rest-hooks
common:
- type: AgenticAccess
  url: agentic-access/capsule-agentic-access.yml
- type: DomainSecurity
  url: security/capsule-domain-security.yml
- type: Authentication
  url: authentication/capsule-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/capsulecrm
- type: Website
  url: https://capsulecrm.com
- type: Documentation
  url: https://developer.capsulecrm.com/
- type: Pricing
  url: https://capsulecrm.com/pricing
- type: Support
  url: https://capsulecrm.com/support
- type: Blog
  url: https://capsulecrm.com/blog
- type: PrivacyPolicy
  url: https://capsulecrm.com/privacy-policy
- type: TermsOfService
  url: https://capsulecrm.com/terms-of-service
- type: Integrations
  url: https://capsulecrm.com/integrations/
integrations:
- name: QuickBooks
- name: Xero
- name: Zapier
- name: Mailchimp
- name: Gmail
- name: Outlook
- name: Transpond
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Capsule

Kin Score

APIs 4

Capsule Opportunities API

Capsule Parties API

Capsule Projects API

Capsule Tasks API

Open Collections 1

Capsule CRM REST API

Pricing Plans 1

Capsule Plans Pricing

Rate Limits 1

Capsule Rate Limits

FinOps 1

Capsule Finops

Security Posture 2

Capsule Authentication

Capsule Domain Security

Agentic Access 1

Capsule Agentic Access

Resources