Holded website screenshot

Holded

Holded is a cloud-based all-in-one business management platform from Spain (now part of Visma) that combines ERP, CRM, accounting, invoicing, inventory, project management, HR, and team collaboration features for small and medium-sized businesses. The Holded REST API provides programmatic access to invoicing, contacts, products, accounting, projects, employees, and CRM data using a simple API key authentication scheme over JSON.

Holded publishes 5 APIs on the APIs.io network, including Accounting API, Crm API, Invoicing API, and 2 more. Tagged areas include ERP, CRM, Accounting, Invoicing, and Business Management.

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

🌐 Visit website 📡 Source on GitHub
28.9/100 thin ▬ flat Agent 17/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
1 APIs
ERPCRMAccountingInvoicingBusiness ManagementSMBSpain

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 28.9/100 · thin
Contract Quality 11.9 / 23
Developer Ergonomics 3.4 / 18
Access Clarity 4.3 / 18
Operational Transparency 0.3 / 12
Contract Governance 0.0 / 11
Discoverability 6.8 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 17/100 · 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 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/holded: 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.

Holded REST API

REST API for managing invoicing, contacts, products, accounting, projects, employees, and CRM records inside the Holded business management platform. Authentication uses an API ...

Holded Accounting API

The Accounting API from Holded — 1 operation(s) for accounting.

Holded Crm API

The Crm API from Holded — 2 operation(s) for crm.

Holded Invoicing API

The Invoicing API from Holded — 15 operation(s) for invoicing.

Holded Projects API

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

Holded Team API

The Team API from Holded — 2 operation(s) for team.

Open Collections 7

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

API Collection

OPEN COLLECTION

Holded REST Accounting API

OPEN COLLECTION

Holded REST Accounting Crm API

OPEN COLLECTION

Holded REST Accounting Invoicing API

OPEN COLLECTION

Holded REST Accounting Projects API

OPEN COLLECTION

Holded REST Accounting Team API

OPEN COLLECTION

Holded REST API

OPEN COLLECTION

Scroll for all 7

Security Posture 2

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

Holded Authentication

apiKey · 1 scheme

SECURITY

Holded Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Holded Agentic Access

42 operations · 20 acting

42 operations · 20 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

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
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

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: holded
name: Holded
description: Holded is a cloud-based all-in-one business management platform from Spain (now part of Visma) that combines
  ERP, CRM, accounting, invoicing, inventory, project management, HR, and team collaboration features for small and medium-sized
  businesses. The Holded REST API provides programmatic access to invoicing, contacts, products, accounting, projects, employees,
  and CRM data using a simple API key authentication scheme over JSON.
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/holded.png
tags:
- ERP
- CRM
- Accounting
- Invoicing
- Business Management
- SMB
- Spain
url: https://raw.githubusercontent.com/api-evangelist/holded/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- aid: holded:rest-api
  name: Holded REST API
  description: REST API for managing invoicing, contacts, products, accounting, projects, employees, and CRM records inside
    the Holded business management platform. Authentication uses an API key passed via the `key` header on every request.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - ERP
  - CRM
  - Invoicing
  - Accounting
  - Inventory
  - Project
  - HR
  tags_raw:
  - ERP
  - CRM
  - Invoicing
  - Accounting
  - Inventory
  - Projects
  - HR
  properties:
  - type: Documentation
    url: https://developers.holded.com/reference
  - type: API Key Guide
    url: https://developers.holded.com/reference/api-key-1
  - type: Help Center
    url: https://help.holded.com/en/articles/6896051-how-to-generate-and-use-the-holded-api
- aid: holded:holded-accounting-api
  name: Holded Accounting API
  description: The Accounting API from Holded — 1 operation(s) for accounting.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - Accounting
  properties:
  - type: OpenAPI
    url: openapi/holded-accounting-api-openapi.yml
- aid: holded:holded-crm-api
  name: Holded Crm API
  description: The Crm API from Holded — 2 operation(s) for crm.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - CRM
  tags_raw:
  - Crm
  properties:
  - type: OpenAPI
    url: openapi/holded-crm-api-openapi.yml
- aid: holded:holded-invoicing-api
  name: Holded Invoicing API
  description: The Invoicing API from Holded — 15 operation(s) for invoicing.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - Invoicing
  properties:
  - type: OpenAPI
    url: openapi/holded-invoicing-api-openapi.yml
- aid: holded:holded-projects-api
  name: Holded Projects API
  description: The Projects API from Holded — 2 operation(s) for projects.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/holded-projects-api-openapi.yml
- aid: holded:holded-team-api
  name: Holded Team API
  description: The Team API from Holded — 2 operation(s) for team.
  humanURL: https://developers.holded.com
  baseURL: https://api.holded.com/api
  tags:
  - Team
  properties:
  - type: OpenAPI
    url: openapi/holded-team-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/holded-agentic-access.yml
- type: DomainSecurity
  url: security/holded-domain-security.yml
- type: Authentication
  url: authentication/holded-authentication.yml
- type: GitHubOrganization
  url: https://github.com/holdedhub
- type: LinkedIn
  url: https://www.linkedin.com/company/holded
- type: Website
  url: https://www.holded.com
- type: Documentation
  url: https://developers.holded.com
- type: Pricing
  url: https://www.holded.com/pricing
- type: Signup
  url: https://app.holded.com/register
- type: LlmsText
  url: https://api.holded.com/llms.txt
- url: https://www.holded.com/en/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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/holded"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/holded/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/holded/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.