Substly

Substly is a SaaS management platform designed for small and medium-sized businesses to track software subscriptions, optimize spend, manage user access, and detect shadow IT across cloud applications. It provides centralized oversight, automated renewal tracking, and integrations with Google Workspace and Microsoft Entra ID.

Substly is listed with 1 API on the APIs.io network. Tagged areas include SaaS Management, Subscription Management, Spend Management, IT Management, and Shadow IT.

The Substly catalog on APIs.io includes 1 JSON-LD context.

Substly’s developer surface includes documentation, pricing, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.3/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 API

SaaS Management Subscription Management Spend Management IT Management Shadow IT

Kin Score

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

Composite quality — 15.3/100 · emerging

Contract Quality 2.3 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 4.3 / 17

Operational Transparency 0.8 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 1/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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 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 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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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
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 →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) 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 →

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 10.7 — up to +22.3 composite points Ask about this →
Developer Ergonomics scores 11.9 — up to +17.6 composite points Ask about this →
Access Clarity scores 25.5 — up to +14.9 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/substly/apis.yml: open an issue on github.com/api-evangelist/substly 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
Procurement and B2B Buying (source-to-pay suites, spend management)	builds-on	17.2 (thin)	-	-
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	17.2 (thin)	-	-

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.

Substly

Substly is an uncomplicated and affordable SaaS management platform for SMBs, offering subscription tracking, spend optimization, user access management, and shadow IT detection...

Substly API pricing

Not yet checked against Substly'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 Substly's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Substly Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Substly Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Substly Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Substly Context

14 classes · 5 properties

JSON-LD

Security Posture 1

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

Substly Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Pricing

Pricing

Company 4

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

AboutUs

AboutUs

Source (apis.yml)

aid: substly
name: Substly
description: Substly is a SaaS management platform designed for small and medium-sized businesses to track software subscriptions,
  optimize spend, manage user access, and detect shadow IT across cloud applications. It provides centralized oversight, automated
  renewal tracking, and integrations with Google Workspace and Microsoft Entra ID.
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/substly.png
tags:
- SaaS Management
- Subscription Management
- Spend Management
- IT Management
- Shadow IT
url: https://raw.githubusercontent.com/api-evangelist/substly/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-05-02'
specificationVersion: '0.23'
apis:
- aid: substly:substly
  name: Substly
  description: Substly is an uncomplicated and affordable SaaS management platform for SMBs, offering subscription tracking,
    spend optimization, user access management, and shadow IT detection. It integrates with Google Workspace and Microsoft
    Entra ID to sync users and services automatically.
  humanURL: https://www.substly.com
  tags:
  - SaaS Management
  - Subscription Management
  - Spend Management
  - Shadow IT
  - User Management
  properties:
  - type: Documentation
    url: https://www.substly.com/en/features/
  - type: Website
    url: https://www.substly.com
  - type: Pricing
    url: https://www.substly.com/en/pricing/
  - type: Blog
    url: https://www.substly.com/en/blog/
  - type: HowItWorks
    url: https://www.substly.com/en/how-it-works
common:
- type: Plans
  url: plans/substly-plans-pricing.yml
- type: RateLimits
  url: rate-limits/substly-rate-limits.yml
- type: FinOps
  url: finops/substly-finops.yml
- type: DomainSecurity
  url: security/substly-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/substly
- type: Website
  url: https://www.substly.com
- type: Documentation
  url: https://www.substly.com/en/features/
- type: Pricing
  url: https://www.substly.com/en/pricing/
- type: Blog
  url: https://www.substly.com/en/blog/
- type: AboutUs
  url: https://www.substly.com/en/about-us/
- type: Login
  url: https://app.substly.com
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Substly API — frequently asked questions

Does Substly have an API?

Yes. APIs.io lists 1 API from Substly, including Substly.

How much does the Substly API cost?

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

Is the Substly API ready for AI agents?

Substly has a Kin Score of 15.3 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), 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.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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.
find_cohortsEvery scored population of providers in the catalog.

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