CSG Systems

CSG is a global provider of customer engagement, revenue management, and payments solutions enabling communications, media, and entertainment companies to monetize and digitally enable customer experiences. CSG's developer surface includes the CSG Forte payments REST API, Forte.js client-side tokenization library, the Forte React Native SDK, and the Singleview convergent billing platform.

CSG Systems publishes 4 APIs on the APIs.io network, including Customers API, Payment Methods API, Settlements API, and 1 more. Tagged areas include Billing, Customer Engagement, Payments, Revenue Management, and Telecom.

The CSG Systems catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

CSG Systems’ developer surface includes authentication, developer portal, documentation, support, changelog, getting-started guide, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.1/100 developing ▼ -5.5 Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessEnterpriseSelf serve

7 APIs

BillingCustomer EngagementPaymentsRevenue ManagementTelecom

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 50.1/100 · developing

Contract Quality 18.4 / 25

Developer Ergonomics 10.4 / 20

Commercial Clarity 5.8 / 20

Operational Transparency 7.5 / 13

Governance 3.8 / 12

Discoverability 7.4 / 10

Agent readiness — 31/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

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

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/csg: 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 7

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

Rate Limits 1

Documented rate limits and quota policies.

Csg Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 4

Reference material describing how the API behaves

OpenAPI

JSONSchema

Documentation

Reference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

JSONLDContext

JSONLDContext

SpectralRules

SpectralRules

Vocabulary

Vocabulary

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 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

ChangeLog

ChangeLog

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: csg
url: https://raw.githubusercontent.com/api-evangelist/csg/refs/heads/main/apis.yml
kind: company
name: CSG Systems
description: CSG is a global provider of customer engagement, revenue management, and payments solutions enabling communications,
  media, and entertainment companies to monetize and digitally enable customer experiences. CSG's developer surface includes
  the CSG Forte payments REST API, Forte.js client-side tokenization library, the Forte React Native SDK, and the Singleview
  convergent billing platform.
accessModel:
  pricing: enterprise
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Enterprise · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/api-evangelist/csg/refs/heads/main/image.png
tags:
- Billing
- Customer Engagement
- Payments
- Revenue Management
- Telecom
type: Index
access: 3rd-Party
specificationVersion: '0.19'
created: '2026-03-18'
modified: '2026-05-19'
apis:
- aid: csg:csg-forte-js
  name: CSG Forte.js
  description: Forte.js is a JavaScript library for secure browser-based payment tokenization. It enables web applications
    to collect and tokenize payment card data client-side before submitting to Forte's payment API, reducing PCI scope.
  image: https://raw.githubusercontent.com/api-evangelist/csg/refs/heads/main/image.png
  humanURL: https://developers.forte.net/forte-js/
  baseURL: https://api.forte.net
  tags:
  - JavaScript
  - Payments
  - SDK
  - Web
  properties:
  - url: https://developers.forte.net/forte-js/
    type: Documentation
- aid: csg:csg-forte-react-native-sdk
  name: CSG Forte React Native SDK
  description: The Forte React Native SDK enables mobile application developers to integrate payment processing capabilities
    into iOS and Android apps built with React Native.
  image: https://raw.githubusercontent.com/api-evangelist/csg/refs/heads/main/image.png
  humanURL: https://developers.forte.net/forte-react-native/
  baseURL: https://api.forte.net
  tags:
  - Mobile
  - Payments
  - React Native
  - SDK
  properties:
  - url: https://developers.forte.net/forte-react-native/
    type: Documentation
  - url: https://developers.forte.net/forte-react-native/
    type: SDKs
- aid: csg:csg-singleview-api
  name: CSG Singleview Billing API
  description: CSG Singleview is a comprehensive convergent billing and revenue management platform designed for communication
    service providers. APIs enable subscriber billing, usage rating, invoice generation, and payment processing across converged
    5G and IoT services.
  image: https://raw.githubusercontent.com/api-evangelist/csg/refs/heads/main/image.png
  humanURL: https://www.csgi.com/
  baseURL: https://api.csgi.com
  tags:
  - Billing
  - BSS
  - Revenue Management
  - SOAP
  - Telecom
  properties:
  - url: https://www.csgi.com/
    type: Documentation
- aid: csg:csg-customers-api
  name: CSG Systems Customers API
  description: Customer record management
  humanURL: https://developers.forte.net/
  baseURL: https://api.forte.net/v3
  tags:
  - Customers
  properties:
  - type: OpenAPI
    url: openapi/csg-customers-api-openapi.yml
  - type: Documentation
    url: https://developers.forte.net/introduction-rest-api/
  - type: Reference
    url: https://restdocs.forte.net/
  - type: GettingStarted
    url: https://developers.forte.net/getting-started/
  - type: Sandbox
    url: https://www.forte.net/test-account-setup/
  - type: ChangeLog
    url: https://releases.forte.net/
  - type: StatusPage
    url: https://status.forte.net/
  - type: Support
    url: https://support.forte.net/
  - type: Training
    url: https://training.forte.net/
  - type: JSONSchema
    url: json-schema/csg-forte-transaction-schema.json
  - type: JSONLDContext
    url: json-ld/csg-context.jsonld
- aid: csg:csg-payment-methods-api
  name: CSG Systems Payment Methods API
  description: Payment method tokenization and management
  humanURL: https://developers.forte.net/
  baseURL: https://api.forte.net/v3
  tags:
  - Payment Methods
  properties:
  - type: OpenAPI
    url: openapi/csg-payment-methods-api-openapi.yml
  - type: Documentation
    url: https://developers.forte.net/introduction-rest-api/
  - type: Reference
    url: https://restdocs.forte.net/
  - type: GettingStarted
    url: https://developers.forte.net/getting-started/
  - type: Sandbox
    url: https://www.forte.net/test-account-setup/
  - type: ChangeLog
    url: https://releases.forte.net/
  - type: StatusPage
    url: https://status.forte.net/
  - type: Support
    url: https://support.forte.net/
  - type: Training
    url: https://training.forte.net/
  - type: JSONSchema
    url: json-schema/csg-forte-transaction-schema.json
  - type: JSONLDContext
    url: json-ld/csg-context.jsonld
- aid: csg:csg-settlements-api
  name: CSG Systems Settlements API
  description: Settlement query and reconciliation
  humanURL: https://developers.forte.net/
  baseURL: https://api.forte.net/v3
  tags:
  - Settlements
  properties:
  - type: OpenAPI
    url: openapi/csg-settlements-api-openapi.yml
  - type: Documentation
    url: https://developers.forte.net/introduction-rest-api/
  - type: Reference
    url: https://restdocs.forte.net/
  - type: GettingStarted
    url: https://developers.forte.net/getting-started/
  - type: Sandbox
    url: https://www.forte.net/test-account-setup/
  - type: ChangeLog
    url: https://releases.forte.net/
  - type: StatusPage
    url: https://status.forte.net/
  - type: Support
    url: https://support.forte.net/
  - type: Training
    url: https://training.forte.net/
  - type: JSONSchema
    url: json-schema/csg-forte-transaction-schema.json
  - type: JSONLDContext
    url: json-ld/csg-context.jsonld
- aid: csg:csg-transactions-api
  name: CSG Systems Transactions API
  description: Payment transaction processing (credit card, echeck, scheduled)
  humanURL: https://developers.forte.net/
  baseURL: https://api.forte.net/v3
  tags:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/csg-transactions-api-openapi.yml
  - type: Documentation
    url: https://developers.forte.net/introduction-rest-api/
  - type: Reference
    url: https://restdocs.forte.net/
  - type: GettingStarted
    url: https://developers.forte.net/getting-started/
  - type: Sandbox
    url: https://www.forte.net/test-account-setup/
  - type: ChangeLog
    url: https://releases.forte.net/
  - type: StatusPage
    url: https://status.forte.net/
  - type: Support
    url: https://support.forte.net/
  - type: Training
    url: https://training.forte.net/
  - type: JSONSchema
    url: json-schema/csg-forte-transaction-schema.json
  - type: JSONLDContext
    url: json-ld/csg-context.jsonld
features:
- name: PCI-Scoped Payment Processing
  description: REST endpoints for credit card, echeck, and scheduled transactions inside a PCI-compliant architecture.
- name: Customer and Payment Method Management
  description: Tokenize and store customer payment methods for repeat billing.
- name: Settlement and Reconciliation
  description: Query settlement records to reconcile funded transactions.
- name: Browser Tokenization
  description: Forte.js client-side tokenization to keep payment data out of merchant servers.
- name: Mobile SDKs
  description: React Native SDK for integrating payments into iOS and Android apps.
- name: Convergent Billing
  description: CSG Singleview supports subscriber billing, rating, and invoicing across 5G and IoT services.
- name: Sandbox Environment
  description: Forte sandbox at sandbox.forte.net/api/v3 for development and integration testing.
useCases:
- name: Merchant Payments
  description: B2B and SaaS merchants accept credit card and ACH payments via Forte.
- name: Recurring Billing
  description: Schedule recurring transactions for subscription billing.
- name: Mobile Checkout
  description: Mobile apps tokenize cards using the React Native SDK and charge through Forte.
- name: Telecom Billing
  description: Communication service providers run subscriber billing on Singleview across 5G and IoT.
- name: Marketplace Payouts
  description: Platforms reconcile and settle funds across many merchant locations.
common:
- type: AgenticAccess
  url: agentic-access/csg-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/csg-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/csg-domain-security.yml
- type: Authentication
  url: authentication/csg-authentication.yml
- type: GitHubOrganization
  url: https://github.com/csg-i
- type: LinkedIn
  url: https://www.linkedin.com/company/csg-
- url: https://www.csgi.com/
  type: Website
- url: openapi/csg-forte-rest-openapi.yml
  type: OpenAPI
- url: json-schema/csg-forte-transaction-schema.json
  type: JSONSchema
- url: json-ld/csg-context.jsonld
  type: JSONLDContext
- url: rules/csg-forte-rules.yml
  type: SpectralRules
- url: vocabulary/csg-forte-vocabulary.yml
  type: Vocabulary
- url: https://www.forte.net/developers/
  type: Portal
- url: https://developers.forte.net/
  type: Documentation
- url: https://restdocs.forte.net/
  type: Reference
- url: https://support.forte.net/
  type: Support
- url: https://status.forte.net/
  type: StatusPage
- url: https://releases.forte.net/
  type: ChangeLog
- url: https://www.forte.net/test-account-setup/
  type: GettingStarted
- url: https://developers.forte.net/feed/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com