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 6 API contracts indexed on the APIs.io network, including Accounting API, Crm API, Invoicing API, and 3 more. Tagged areas include ERP, CRM, Accounting, Invoicing, and Business Management.

The Holded catalog on APIs.io includes 1 Spectral governance ruleset.

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

🌐 Visit website 📡 Profile data on GitHub

28.7/100 thin ▬ flat Agent 43/100 agent ready Front door AI 4/6 moderate Heartbeat 66/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 MCP Servers

ERP CRM Accounting Invoicing Business Management Small Business Spain

What this lets a business do 4

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

Financial Management

BC-200

AccountingInvoicing

GET /accounting/v1/dailyjournal POST /accounting/v1/dailyjournal POST /invoicing/v1/documents/invoice GET /invoicing/v1/documents/salesreceipt

Project & Portfolio Management

BC-900

Projects

GET /projects/v1/projects POST /projects/v1/projects POST /projects/v1/projects/{projectId}/tasks

Sales Management

BC-410

CRM

GET /crm/v1/funnels GET /crm/v1/leads

Human Capital Management

BC-300

Team

GET /team/v1/employees POST /team/v1/employees GET /team/v1/timetracking

Kin Score

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

Composite quality — 28.7/100 · thin

Contract Quality 8.9 / 19

Developer Ergonomics 2.9 / 15

Access Clarity 3.6 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.2 / 9

Discoverability 5.6 / 8

Regulatory Posture 1.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 43/100 · 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 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 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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 19.0 — up to +16.2 composite points
Access Clarity scores 23.7 — up to +15.3 composite points
Contract Quality scores 47.7 — up to +13.1 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/holded/apis.yml: open an issue on github.com/api-evangelist/holded 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	builds-on	15.0	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 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 6

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

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

MCP Servers 1

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

Holded MCP Server

Remote MCP server at mcp.holded.com over HTTP.

MCP SERVER

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Holded API Rules

41 rules · 39 errors 1 warnings 1 info

SPECTRAL

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

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

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

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: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/holded.png
tags:
- ERP
- CRM
- Accounting
- Invoicing
- Business Management
- Small Business
- Spain
tags_raw:
- 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
  - Human Resources
  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: CapabilityMap
  url: capabilities/holded-capability-edges.yml
  name: Holded Business Capability Map
- 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

Holded API — frequently asked questions

Does Holded have an API?

Yes. APIs.io lists 6 APIs from Holded, including Holded REST API, Holded Accounting API and Holded Crm API, and 3 more.

Is there an OpenAPI specification for the Holded API?

Yes. APIs.io indexes 5 OpenAPI specifications for Holded, each linked for download from this page.

How do I authenticate with the Holded API?

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

Does Holded have an MCP server?

Yes. APIs.io lists 1 MCP server for Holded: Remote MCP server at mcp.holded.com over HTTP.

Is the Holded API ready for AI agents?

Holded has a Kin Score of 28.7 out of 100 (thin) and an Agent Readiness score of 43.3 (agent-ready), scored by API Evangelist on 2026-11-06.

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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.
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