Maxio

Maxio is a SaaS billing and financial operations platform formed from the merger of Chargify and SaaSOptics, providing subscription management, recurring billing, revenue recognition, and SaaS metrics for B2B software companies. Maxio Advanced Billing (formerly Chargify) exposes a REST API for managing customers, subscriptions, products, components, invoices, and events. Authentication uses HTTP Basic auth with a per-site API key as the username.

Maxio is listed with 1 API on the APIs.io network. Tagged areas include Billing, Subscription, Recurring Billing, Revenue Recognition, and SaaS Metrics.

Maxio’s developer surface includes sandbox, documentation, signup flow, pricing, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

24.6/100 emerging ▬ flat Agent 3/100 human only Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

1 API

Billing Subscription Recurring Billing Revenue Recognition SaaS Metrics Payments

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 24.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 7.2 / 17

Operational Transparency 3.2 / 11

Contract Governance 0.0 / 10

Discoverability 6.2 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Payments 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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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/maxio: 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 →

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
Billing, Subscriptions and Monetization	undeclared	-	-	-
MACH & Headless Commerce	undeclared	-	-	-
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	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.

APIs 1

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

Maxio Advanced Billing API

REST API for managing the full subscription lifecycle in Maxio Advanced Billing (formerly Chargify): customers, products, components, subscriptions, invoices, transactions, coup...

Security Posture 2

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

Maxio Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Maxio Trust Center

SOC 2, ISO 27001, PCI DSS, GDPR

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Security

Security

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Help Center

Help Center

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

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

OpenIDConnect

OpenIDConnect

Source (apis.yml)

aid: maxio
name: Maxio
description: Maxio is a SaaS billing and financial operations platform formed from the merger of Chargify and SaaSOptics,
  providing subscription management, recurring billing, revenue recognition, and SaaS metrics for B2B software companies.
  Maxio Advanced Billing (formerly Chargify) exposes a REST API for managing customers, subscriptions, products, components,
  invoices, and events. Authentication uses HTTP Basic auth with a per-site API key as the username.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/maxio.png
tags:
- Billing
- Subscription
- Recurring Billing
- Revenue Recognition
- SaaS Metrics
- Payments
tags_raw:
- Billing
- Subscriptions
- Recurring Billing
- Revenue Recognition
- SaaS Metrics
- Payments
url: https://raw.githubusercontent.com/api-evangelist/maxio/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- aid: maxio:advanced-billing-api
  name: Maxio Advanced Billing API
  description: 'REST API for managing the full subscription lifecycle in Maxio Advanced Billing (formerly Chargify): customers,
    products, components, subscriptions, invoices, transactions, coupons, and webhooks. Authentication uses HTTP Basic with
    an API key as the username and ''x'' as the password, scoped to a Maxio site subdomain.'
  humanURL: https://developers.maxio.com/
  baseURL: https://{subdomain}.chargify.com
  tags:
  - Billing
  - Subscription
  - Invoices
  - Customers
  - Product
  tags_raw:
  - Billing
  - Subscriptions
  - Invoices
  - Customers
  - Products
  properties:
  - type: Documentation
    url: https://developers.maxio.com/
  - type: Authentication
    url: https://developers.maxio.com/http/getting-started/authentication
  - type: APIReference
    url: https://developers.maxio.com/docs/api-docs/7b6ea12f39549-chargify-api
  - type: API Keys
    url: https://docs.maxio.com/hc/en-us/articles/24294819360525-Advanced-Billing-API-Keys
common:
- type: Sandbox
  url: https://www.maxio.com/sandbox
- type: Security
  url: https://www.maxio.com/security
- type: StatusPage
  url: https://maxio.statuspage.io/
- type: PrivacyPolicy
  url: https://www.maxio.com/privacy-policy
- type: OpenIDConnect
  url: https://www.maxio.com/.well-known/oauth-authorization-server
- type: TrustCenter
  url: security/maxio-trust-center.yml
- type: DomainSecurity
  url: security/maxio-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/wearemaxio
- type: Website
  url: https://www.maxio.com
- type: Documentation
  url: https://developers.maxio.com/
- type: Help Center
  url: https://docs.maxio.com/
- type: GitHubOrganization
  url: https://github.com/maxio-com
- type: Signup
  url: https://www.maxio.com/get-started
- type: Pricing
  url: https://www.maxio.com/pricing
- type: LlmsText
  url: https://maxio.com/llms.txt
- url: https://www.maxio.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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