UsageRail

UsageRail provides an API monetization platform for small teams, enabling them to issue API keys, enforce rate limits and quotas, and bill usage through Stripe integration. The service offers a developer portal, documentation, and tools for managing customers, keys, usage data, and plan changes, aiming to simplify API productization and revenue generation for SaaS providers.

UsageRail is listed with 1 API on the APIs.io network. Tagged areas include Company, API Monetization, Software-as-a-Service, Billing, and Rate Limiting.

The UsageRail catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

UsageRail’s developer surface includes authentication, getting-started guide, documentation, pricing, signup flow, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.3/100 thin Agent 20/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API

Company API Monetization Software-as-a-Service Billing Rate Limiting Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 33.3/100 · thin

Contract Quality 5.5 / 21

Developer Ergonomics 5.1 / 17

Access Clarity 9.2 / 17

Operational Transparency 0.3 / 11

Contract Governance 2.2 / 10

Discoverability 5.3 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 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 7 / 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

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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<a href="https://apis.io/providers/usagerail/"><img src="https://apis.io/badge/usagerail/card.svg" alt="UsageRail on APIs.io — Kin Score by API Evangelist"></a>

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 26.1 — up to +18.5 composite points
Developer Ergonomics scores 29.8 — up to +14.0 composite points
Operational Transparency scores 2.6 — up to +12.7 composite points

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.

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/usagerail/apis.yml: open an issue on github.com/api-evangelist/usagerail 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 →

APIs 1

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

UsageRail API

UsageRail API as documented publicly: 16 operations. Contract generated from the documentation by API Evangelist (2026-11-02); not the provider's own document.

UsageRail API pricing

Prices published by UsageRail, read 2026-11-02 from usagerail.com/pricing. A free plan or tier is listed.

Plan	Price
Free	Free
Starter	$29/month
Growth	$79/month
Scale	$199/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Usagerail Plans Pricing

4 plans

PLANS

Semantic Vocabularies 1

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

Usagerail Context

22 classes · 30 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

UsageRail API Rules

47 rules · 44 errors 2 warnings 1 info

SPECTRAL

JSON Schema 6

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

GetV1ConsumersIdUsageResponse

6 properties

JSON SCHEMA

PostV1ConsumersIdCheckoutRequest

5 properties

JSON SCHEMA

PostV1ConsumersIdCreditsAdjustRequest

2 properties

JSON SCHEMA

PostV1ConsumersIdKeysResponse

4 properties

JSON SCHEMA

PostV1ConsumersIdPlanRequest

3 properties

JSON SCHEMA

PostV1ConsumersResponse

1 properties

JSON SCHEMA

Security Posture 2

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

Usagerail Authentication

2 schemes

SECURITY

Usagerail Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

PrivacyPolicy

Pricing

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: usagerail
name: UsageRail
description: UsageRail provides an API monetization platform for small teams, enabling them to issue API keys, enforce rate
  limits and quotas, and bill usage through Stripe integration. The service offers a developer portal, documentation, and
  tools for managing customers, keys, usage data, and plan changes, aiming to simplify API productization and revenue generation
  for SaaS providers.
url: https://artifacts.apis.io/usagerail/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  probe_state: unreadable
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Company
- API Monetization
- Software-as-a-Service
- Billing
- Rate Limiting
- Developer Tools
tags_raw:
- Company
- API Monetization
- SaaS
- Billing
- Rate Limiting
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/usagerail-plans-pricing.yml
- type: Spectral
  url: rules/usagerail-rules.yml
- type: JSONLD
  url: json-ld/usagerail-context.jsonld
- type: Vocabulary
  url: vocabulary/usagerail-vocabulary.yml
- type: DataModel
  url: data-model/usagerail-data-model.yml
- type: Authentication
  url: authentication/usagerail-authentication.yml
- type: Conformance
  url: conformance/usagerail-conformance.yml
- type: LLMsTxt
  url: llms/usagerail-llms.txt
- type: Hosts
  url: hosts/usagerail-hosts.yml
- type: Vendors
  url: vendors/usagerail-vendors.yml
- type: SDKs
  url: packages/usagerail-packages.yml
- type: Packages
  url: packages/usagerail-packages.yml
- type: PrivacyPolicy
  url: https://usagerail.com/privacy
- type: GettingStarted
  url: https://usagerail.com/docs/quickstart
- type: GitHubOrganization
  url: https://github.com/usagerail
- type: DomainSecurity
  url: security/usagerail-domain-security.yml
- type: Website
  url: https://usagerail.com
- type: Documentation
  url: https://usagerail.com/docs/server-api
- type: Pricing
  url: https://usagerail.com/pricing
- type: TermsOfService
  url: https://usagerail.com/terms
- type: SignUp
  url: https://app.usagerail.com/login
apis:
- aid: usagerail:usagerail-api
  name: UsageRail API
  description: 'UsageRail API as documented publicly: 16 operations. Contract generated from the documentation by API Evangelist
    (2026-11-02); not the provider''s own document.'
  humanURL: https://usagerail.com/docs/server-api
  baseURL: https://api.usagerail.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/usagerail-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/usagerail-post-v1-consumers-response-schema.json
  - type: JSONSchema
    url: json-schema/usagerail-post-v1-consumers-id-checkout-request-schema.json
  - type: JSONSchema
    url: json-schema/usagerail-get-v1-consumers-id-usage-response-schema.json
  - type: JSONSchema
    url: json-schema/usagerail-post-v1-consumers-id-keys-response-schema.json
  - type: JSONSchema
    url: json-schema/usagerail-post-v1-consumers-id-plan-request-schema.json
  - type: JSONSchema
    url: json-schema/usagerail-post-v1-consumers-id-credits-adjust-request-schema.json
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Documentation pages are HTML only and no OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contracts were found.
  evidence:
  - url: https://usagerail.com/docs/server-api
    status: 200
  checked: '2026-11-02'
x-submission-notes: API key and quota management for sellers; no OpenAPI yet.
x-submission-probe: docs 200 on 2026-11-02
x-submitted-by: support@usagerail.com (apis.io/add, 2026-11-02)
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 26
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

UsageRail API — frequently asked questions

Does UsageRail have an API?

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

Is there an OpenAPI specification for the UsageRail API?

Yes. APIs.io indexes 1 OpenAPI specification for UsageRail, each linked for download from this page.

How do I authenticate with the UsageRail API?

UsageRail uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as Usagerail Authentication.

How much does the UsageRail API cost?

UsageRail publishes its prices; its Starter plan is $29/month as of 2026-11-02. APIs.io lists 4 pricing plans for UsageRail, with each plan's price, limits and inclusions under Pricing on this page.

Is the UsageRail API ready for AI agents?

UsageRail has a Kin Score of 33.3 out of 100 (thin) and an Agent Readiness score of 19.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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