HostBill

HostBill is a comprehensive billing and automation software for web hosting providers, domain registrars, and online service companies. HostBill provides an Admin API that enables custom applications to call HostBill functions remotely via HTTP protocol or from HostBill modules.

HostBill is listed with 8 APIs on the APIs.io network, including Accounts API, Admin API, Clients API, and 5 more. Tagged areas include Automation, Billing, Domain Registration, and Web Hosting.

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

HostBill’s developer surface includes authentication, documentation, support, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

27.6/100 thin ▬ flat Agent 18/100 agent aware Front door AI 4/6 moderate Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

8 APIs

Automation Billing Domain Registration Web Hosting

What this lets a business do 2

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

Customer Service Management

BC-430

Tickets

POST /admin/api.php#getTickets

Subscription Billing & Revenue Management

BC-4250

Invoices

POST /admin/api.php#getInvoices

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 27.6/100 · thin

Contract Quality 7.7 / 19

Developer Ergonomics 4.3 / 15

Access Clarity 1.0 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 4.7 / 8

Regulatory Posture 2.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 18/100 · 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 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Contract Quality scores 40.9 — up to +14.8 composite points Ask about this →
Developer Ergonomics scores 28.6 — up to +14.3 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/hostbill/apis.yml: open an issue on github.com/api-evangelist/hostbill 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
Domains and DNS (registrars, registries, DNS)	undeclared	-	-	-

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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

HostBill Accounts API

The Accounts API from HostBill — 1 operation(s) for accounts.

HostBill Admin API

The Admin API from HostBill — 1 operation(s) for admin.

HostBill Clients API

The Clients API from HostBill — 1 operation(s) for clients.

HostBill Domains API

The Domains API from HostBill — 1 operation(s) for domains.

HostBill Invoices API

The Invoices API from HostBill — 1 operation(s) for invoices.

HostBill Orders API

The Orders API from HostBill — 1 operation(s) for orders.

HostBill Tickets API

The Tickets API from HostBill — 1 operation(s) for tickets.

HostBill Transactions API

The Transactions API from HostBill — 1 operation(s) for transactions.

Scroll for all 8

Open Collections 9

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

HostBill Admin Accounts API

OPEN COLLECTION

HostBill Accounts Admin API

OPEN COLLECTION

HostBill Admin Accounts Clients API

OPEN COLLECTION

HostBill Admin Accounts Domains API

OPEN COLLECTION

HostBill Admin Accounts Invoices API

OPEN COLLECTION

HostBill Admin Accounts Orders API

OPEN COLLECTION

HostBill Admin Accounts Tickets API

OPEN COLLECTION

HostBill Admin Accounts Transactions API

OPEN COLLECTION

HostBill Admin API

OPEN COLLECTION

Scroll for all 9

HostBill API pricing

Not yet checked against HostBill's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against HostBill's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

HostBill Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

HostBill Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

HostBill Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

HostBill API Rules

56 rules · 54 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 3

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

HostBill Authentication

apiKey · 2 schemes

SECURITY

HostBill Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

HostBill Vulnerability Disclosure

no policy recorded

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

HostBill Agentic Access

8 operations · 2 acting

AGENTIC

Resources

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

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: hostbill
name: HostBill
description: HostBill is a comprehensive billing and automation software for web hosting providers, domain registrars, and
  online service companies. HostBill provides an Admin API that enables custom applications to call HostBill functions remotely
  via HTTP protocol or from HostBill modules.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hostbill.png
tags:
- Automation
- Billing
- Domain Registration
- Web Hosting
url: https://raw.githubusercontent.com/api-evangelist/hostbill/refs/heads/main/apis.yml
created: '2025-02-09'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: hostbill:hostbill-accounts-api
  name: HostBill Accounts API
  description: The Accounts API from HostBill — 1 operation(s) for accounts.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/hostbill-accounts-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-admin-api
  name: HostBill Admin API
  description: The Admin API from HostBill — 1 operation(s) for admin.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/hostbill-admin-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-clients-api
  name: HostBill Clients API
  description: The Clients API from HostBill — 1 operation(s) for clients.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Clients
  properties:
  - type: OpenAPI
    url: openapi/hostbill-clients-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-domains-api
  name: HostBill Domains API
  description: The Domains API from HostBill — 1 operation(s) for domains.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/hostbill-domains-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-invoices-api
  name: HostBill Invoices API
  description: The Invoices API from HostBill — 1 operation(s) for invoices.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/hostbill-invoices-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-orders-api
  name: HostBill Orders API
  description: The Orders API from HostBill — 1 operation(s) for orders.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Order
  tags_raw:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/hostbill-orders-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-tickets-api
  name: HostBill Tickets API
  description: The Tickets API from HostBill — 1 operation(s) for tickets.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Ticketing
  tags_raw:
  - Tickets
  properties:
  - type: OpenAPI
    url: openapi/hostbill-tickets-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
- aid: hostbill:hostbill-transactions-api
  name: HostBill Transactions API
  description: The Transactions API from HostBill — 1 operation(s) for transactions.
  humanURL: https://api2.hostbillapp.com/
  baseURL: https://yourinstance.hostbillapp.com/api2.php
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/hostbill-transactions-api-openapi.yml
  - type: Documentation
    url: https://api2.hostbillapp.com/
  - type: Authentication
    url: https://api2.hostbillapp.com/
common:
- type: Plans
  url: plans/hostbill-plans-pricing.yml
- type: RateLimits
  url: rate-limits/hostbill-rate-limits.yml
- type: FinOps
  url: finops/hostbill-finops.yml
- type: CapabilityMap
  url: capabilities/hostbill-capability-edges.yml
  name: HostBill Business Capability Map
- type: AgenticAccess
  url: agentic-access/hostbill-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/hostbill-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/hostbill-domain-security.yml
- type: Authentication
  url: authentication/hostbill-authentication.yml
- type: GitHubOrganization
  url: https://github.com/hostbill
- type: LinkedIn
  url: https://www.linkedin.com/company/hostbill
- type: Website
  url: https://hostbillapp.com/
- type: Documentation
  url: https://hostbillapp.com/features/
- type: Support
  url: https://hostbillapp.com/support/
- url: https://blog.hostbillapp.com/feed/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

HostBill API — frequently asked questions

Does HostBill have an API?

Yes. APIs.io lists 8 APIs from HostBill, including HostBill Accounts API, HostBill Admin API and HostBill Clients API, and 5 more.

Is there an OpenAPI specification for the HostBill API?

Yes. APIs.io indexes 8 OpenAPI specifications for HostBill, each linked for download from this page.

How do I authenticate with the HostBill API?

HostBill uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as HostBill Authentication.

How much does the HostBill API cost?

APIs.io lists 3 pricing plans for HostBill, with each plan's price, limits and inclusions under Pricing on this page.

Is the HostBill API ready for AI agents?

HostBill has a Kin Score of 27.6 out of 100 (thin) and an Agent Readiness score of 17.9 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

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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.
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