Accelo website screenshot

Accelo

Accelo is a cloud-based service operations automation (ServOps) platform that unifies project management, client relationship management (CRM), time tracking, retainers, quotes, billing, and invoicing for professional services businesses. The Accelo REST API exposes resources such as companies, contacts, activities, tasks, jobs (projects), milestones, invoices, contracts, and webhooks using OAuth 2.0 authentication scoped to a deployment subdomain.

Accelo publishes 7 APIs on the APIs.io network, including Activities API, Companies API, Contacts API, and 4 more. Tagged areas include Professional Services Automation, Project Management, CRM, Time Tracking, and Invoicing.

Accelo’s developer surface includes authentication, documentation, signup flow, pricing, support, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
26.8/100 thin ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessSelf serve
1 APIs
Professional Services AutomationProject ManagementCRMTime TrackingInvoicingService Operations

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 26.8/100 · thin
Contract Quality 10.1 / 23
Developer Ergonomics 5.1 / 18
Access Clarity 3.1 / 18
Operational Transparency 0.3 / 12
Contract Governance 0.0 / 11
Discoverability 6.2 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 22/100 · 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 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 6 / 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/accelo: 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 8

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

Accelo REST API

REST API for Accelo with CRUD access to companies, contacts, activities, tasks, projects (jobs), milestones, invoices, contracts, quotes, prospects, time entries, staff, and web...

Accelo Activities API

The Activities API from Accelo — 4 operation(s) for activities.

Accelo Companies API

The Companies API from Accelo — 2 operation(s) for companies.

Accelo Contacts API

The Contacts API from Accelo — 2 operation(s) for contacts.

Accelo Issues API

The Issues API from Accelo — 2 operation(s) for issues.

Accelo Jobs API

The Jobs API from Accelo — 2 operation(s) for jobs.

Accelo OAuth API

The OAuth API from Accelo — 1 operation(s) for oauth.

Accelo Tasks API

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

Scroll for all 8

Open Collections 9

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

API Collection

OPEN COLLECTION

Accelo REST Activities API

OPEN COLLECTION

Accelo REST Activities Companies API

OPEN COLLECTION

Accelo REST Activities Contacts API

OPEN COLLECTION

Accelo REST Activities Issues API

OPEN COLLECTION

Accelo REST Activities Jobs API

OPEN COLLECTION

Accelo REST Activities OAuth API

OPEN COLLECTION

Accelo REST Activities Tasks API

OPEN COLLECTION

Accelo REST API

OPEN COLLECTION

Scroll for all 9

Security Posture 2

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

Accelo Authentication

oauth2 · 1 scheme

SECURITY

Accelo Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Accelo Scopes

4 scopes · authorizationCode/clientCredentials

4 scopes

SCOPES

Agentic Access 1

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

Accelo Agentic Access

29 operations · 14 acting

29 operations · 14 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Signup
Signup
 Login
Login

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes

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

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: accelo
name: Accelo
description: Accelo is a cloud-based service operations automation (ServOps) platform that unifies project management, client
  relationship management (CRM), time tracking, retainers, quotes, billing, and invoicing for professional services businesses.
  The Accelo REST API exposes resources such as companies, contacts, activities, tasks, jobs (projects), milestones, invoices,
  contracts, and webhooks using OAuth 2.0 authentication scoped to a deployment subdomain.
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: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/accelo.png
tags:
- Professional Services Automation
- Project Management
- CRM
- Time Tracking
- Invoicing
- Service Operations
url: https://raw.githubusercontent.com/api-evangelist/accelo/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- aid: accelo:accelo-api
  name: Accelo REST API
  description: REST API for Accelo with CRUD access to companies, contacts, activities, tasks, projects (jobs), milestones,
    invoices, contracts, quotes, prospects, time entries, staff, and webhooks. Uses OAuth 2.0 (service, web, and installed
    application grants) with a Bearer access token and deployment-scoped subdomain.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Professional Services Automation
  - Project Management
  - CRM
  - Time Tracking
  - Invoicing
  properties:
  - type: Documentation
    url: https://api.accelo.com/docs/
  - type: Authentication
    url: https://api.accelo.com/docs/#authentication
- aid: accelo:accelo-activities-api
  name: Accelo Activities API
  description: The Activities API from Accelo — 4 operation(s) for activities.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Activities
  properties:
  - type: OpenAPI
    url: openapi/accelo-activities-api-openapi.yml
- aid: accelo:accelo-companies-api
  name: Accelo Companies API
  description: The Companies API from Accelo — 2 operation(s) for companies.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/accelo-companies-api-openapi.yml
- aid: accelo:accelo-contacts-api
  name: Accelo Contacts API
  description: The Contacts API from Accelo — 2 operation(s) for contacts.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/accelo-contacts-api-openapi.yml
- aid: accelo:accelo-issues-api
  name: Accelo Issues API
  description: The Issues API from Accelo — 2 operation(s) for issues.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Issues
  properties:
  - type: OpenAPI
    url: openapi/accelo-issues-api-openapi.yml
- aid: accelo:accelo-jobs-api
  name: Accelo Jobs API
  description: The Jobs API from Accelo — 2 operation(s) for jobs.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/accelo-jobs-api-openapi.yml
- aid: accelo:accelo-oauth-api
  name: Accelo OAuth API
  description: The OAuth API from Accelo — 1 operation(s) for oauth.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Authentication
  tags_raw:
  - OAuth
  properties:
  - type: OpenAPI
    url: openapi/accelo-oauth-api-openapi.yml
- aid: accelo:accelo-tasks-api
  name: Accelo Tasks API
  description: The Tasks API from Accelo — 2 operation(s) for tasks.
  humanURL: https://api.accelo.com/docs/
  baseURL: https://{deployment}.api.accelo.com/api/v0
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/accelo-tasks-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/accelo-agentic-access.yml
- type: DomainSecurity
  url: security/accelo-domain-security.yml
- type: Authentication
  url: authentication/accelo-authentication.yml
- type: OAuthScopes
  url: scopes/accelo-scopes.yml
- type: GitHubOrganization
  url: https://github.com/Accelo
- type: LinkedIn
  url: https://www.linkedin.com/company/accelo
- type: Website
  url: https://www.accelo.com
- type: Documentation
  url: https://api.accelo.com/docs/
- type: Signup
  url: https://www.accelo.com/signup/
- type: Pricing
  url: https://www.accelo.com/pricing/
- type: Login
  url: https://app.accelo.com/login/
- type: Support
  url: https://help.accelo.com/
- type: Blog
  url: https://www.accelo.com/resources/blog/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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