Capsule CRM

Capsule is a simple online CRM for small and midsize businesses that manages contacts, sales pipelines, tasks, projects, and email integration with a focus on ease of use. The Capsule API v2 is a REST/JSON service exposing parties (people and organisations), opportunities, projects, tasks, cases, users, and custom fields for integration with marketing, finance, and productivity tools. Authentication uses a Bearer token (personal access token or OAuth 2 access token) against the base URL https://api.capsulecrm.com/api/v2/.

Capsule CRM publishes 5 APIs on the APIs.io network, including Entries API, Opportunities API, Parties API, and 2 more. Tagged areas include CRM, Sales, Contacts, Pipeline Management, and Task.

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

🌐 Visit website 📡 Source on GitHub

31.9/100 thin ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs 1 MCP Servers

CRM Sales Contacts Pipeline Management Task Project SMB

Kin Score

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

Composite quality — 31.9/100 · thin

Contract Quality 12.1 / 23

Developer Ergonomics 6.9 / 18

Access Clarity 4.3 / 18

Operational Transparency 0.0 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

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 0 / 7

Rate-Limit Signaling 0 / 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/capsule-crm: 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 6

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

Capsule CRM API v2

REST API for managing Capsule parties (contacts and organisations), opportunities, projects (cases), tasks, users, tags, and custom fields. Each request must include an Authoriz...

Capsule CRM Entries API

The Entries API from Capsule CRM — 2 operation(s) for entries.

Capsule CRM Opportunities API

The Opportunities API from Capsule CRM — 3 operation(s) for opportunities.

Capsule CRM Parties API

The Parties API from Capsule CRM — 4 operation(s) for parties.

Capsule CRM Projects API

The Projects API from Capsule CRM — 2 operation(s) for projects.

Capsule CRM Tasks API

The Tasks API from Capsule CRM — 2 operation(s) for tasks.

Open Collections 7

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

API Collection

OPEN COLLECTION

Capsule CRM API v2 Entries API

OPEN COLLECTION

Capsule CRM API v2 Entries Opportunities API

OPEN COLLECTION

Capsule CRM API v2 Entries Parties API

OPEN COLLECTION

Capsule CRM API v2 Entries Projects API

OPEN COLLECTION

Capsule CRM API v2 Entries Tasks API

OPEN COLLECTION

Capsule CRM API v2

OPEN COLLECTION

Scroll for all 7

MCP Servers 1

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

MCP Server

MCP SERVER

Security Posture 2

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

Capsule Crm Authentication

http · 1 scheme

SECURITY

Capsule Crm Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Capsule Crm Agentic Access

27 operations · 15 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

MCPServer

MCPServer

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 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

aid: capsule-crm
name: Capsule CRM
description: Capsule is a simple online CRM for small and midsize businesses that manages contacts, sales pipelines, tasks,
  projects, and email integration with a focus on ease of use. The Capsule API v2 is a REST/JSON service exposing parties
  (people and organisations), opportunities, projects, tasks, cases, users, and custom fields for integration with marketing,
  finance, and productivity tools. Authentication uses a Bearer token (personal access token or OAuth 2 access token) against
  the base URL https://api.capsulecrm.com/api/v2/.
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/capsule-crm.png
tags:
- CRM
- Sales
- Contacts
- Pipeline Management
- Task
- Project
- SMB
tags_raw:
- CRM
- Sales
- Contacts
- Pipeline Management
- Tasks
- Projects
- SMB
url: https://raw.githubusercontent.com/api-evangelist/capsule-crm/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-07-12'
specificationVersion: '0.23'
apis:
- aid: capsule-crm:v2-api
  name: Capsule CRM API v2
  description: REST API for managing Capsule parties (contacts and organisations), opportunities, projects (cases), tasks,
    users, tags, and custom fields. Each request must include an Authorization Bearer token obtained from a personal access
    token or the OAuth 2 authorization code flow.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - CRM
  - Contacts
  - Opportunities
  - Project
  - Task
  - Authentication
  tags_raw:
  - CRM
  - Contacts
  - Opportunities
  - Projects
  - Tasks
  - OAuth
  properties:
  - type: Documentation
    url: https://developer.capsulecrm.com/
  - type: Authentication
    url: https://developer.capsulecrm.com/v2/overview/authentication
- aid: capsule-crm:capsule-crm-entries-api
  name: Capsule CRM Entries API
  description: The Entries API from Capsule CRM — 2 operation(s) for entries.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - Entries
  properties:
  - type: OpenAPI
    url: openapi/capsule-crm-entries-api-openapi.yml
- aid: capsule-crm:capsule-crm-opportunities-api
  name: Capsule CRM Opportunities API
  description: The Opportunities API from Capsule CRM — 3 operation(s) for opportunities.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - Opportunities
  properties:
  - type: OpenAPI
    url: openapi/capsule-crm-opportunities-api-openapi.yml
- aid: capsule-crm:capsule-crm-parties-api
  name: Capsule CRM Parties API
  description: The Parties API from Capsule CRM — 4 operation(s) for parties.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - Parties
  properties:
  - type: OpenAPI
    url: openapi/capsule-crm-parties-api-openapi.yml
- aid: capsule-crm:capsule-crm-projects-api
  name: Capsule CRM Projects API
  description: The Projects API from Capsule CRM — 2 operation(s) for projects.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/capsule-crm-projects-api-openapi.yml
- aid: capsule-crm:capsule-crm-tasks-api
  name: Capsule CRM Tasks API
  description: The Tasks API from Capsule CRM — 2 operation(s) for tasks.
  humanURL: https://developer.capsulecrm.com/
  baseURL: https://api.capsulecrm.com/api/v2/
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/capsule-crm-tasks-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/capsule-crm-agentic-access.yml
- type: DomainSecurity
  url: security/capsule-crm-domain-security.yml
- type: Authentication
  url: authentication/capsule-crm-authentication.yml
- type: Website
  url: https://capsulecrm.com
- type: DeveloperPortal
  url: https://developer.capsulecrm.com
- type: Documentation
  url: https://developer.capsulecrm.com/
- type: Pricing
  url: https://capsulecrm.com/pricing/
- type: Signup
  url: https://capsulecrm.com/signup/
- type: Support
  url: https://support.capsulecrm.com
- type: LinkedIn
  url: https://www.linkedin.com/company/capsule-crm
- url: https://capsulecrm.com/blog/
  type: Blog
- name: MCP Server
  url: https://capsulecrm.com/blog/what-if-you-could-just-ask-your-crm-introducing-capsule-mcp/
  type: MCPServer
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: capsule
x-relationship: product

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