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 publishes 1 API on the APIs.io network. Tagged areas include Billing, Subscriptions, Recurring Billing, Revenue Recognition, and SaaS Metrics.

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

🌐 Visit website 📡 Source on GitHub

14.7/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1

1 APIs

BillingSubscriptionsRecurring BillingRevenue RecognitionSaaS MetricsPayments

Kin Score

Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1

Composite quality — 14.7/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 3.0 / 20

Commercial Clarity 3.7 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.9 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

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 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 2

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Help Center

Help Center

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

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
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
- 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: '0.19'
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
  - 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: 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