Principly

Principly, Inc. is an SEC-registered investment adviser that operates the consumer fintech product Backer (backer.com), a mobile-first platform for opening and managing 529 education savings plans. Backer lets parents open a 529 plan in minutes, automate contributions, and share custom gifting links so family and friends can contribute to a child's college fund. The service helps families choose among more than 100 U.S. 529 plans, reporting 250K+ users and $70M+ saved. It is a consumer-facing mobile and web application and does not publish a public developer API, documentation, or SDKs. Principly is backed by 500 Global and was added to the API Evangelist network as a portfolio company.

Principly is profiled on the APIs.io network. Tagged areas include Company, Fintech, Financial Services, 529 Plans, and Education Savings.

Principly’s developer surface includes pricing, engineering blog, support, signup flow, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5

0 APIs

CompanyFintechFinancial Services529 PlansEducation SavingsCollege SavingsConsumer FinanceInvestment AdviserMobile App

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5

Composite quality — 12.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.3 / 20

Commercial Clarity 4.7 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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/principly: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

HelpCenter

HelpCenter

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: principly
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/principly.png
name: Principly
description: Principly, Inc. is an SEC-registered investment adviser that operates the consumer fintech product Backer (backer.com),
  a mobile-first platform for opening and managing 529 education savings plans. Backer lets parents open a 529 plan in minutes,
  automate contributions, and share custom gifting links so family and friends can contribute to a child's college fund. The
  service helps families choose among more than 100 U.S. 529 plans, reporting 250K+ users and $70M+ saved. It is a consumer-facing
  mobile and web application and does not publish a public developer API, documentation, or SDKs. Principly is backed by 500
  Global and was added to the API Evangelist network as a portfolio company.
url: https://raw.githubusercontent.com/api-evangelist/principly/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Fintech
- Financial Services
- 529 Plans
- Education Savings
- College Savings
- Consumer Finance
- Investment Adviser
- Mobile App
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/principly-domain-security.yml
- type: Website
  url: https://backer.com
- type: Pricing
  url: https://backer.com/pricing
- type: Blog
  url: https://backer.com/blog
- type: HelpCenter
  url: https://help.backer.com/en/
- type: Support
  url: https://help.backer.com/en/
- type: SignUp
  url: https://app.backer.com/signup
- type: Login
  url: https://app.backer.com/signin
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1