Blink Ledger Systems

Blink (Blink Ledger Systems Inc.) builds online identity and payment technologies for digital publishers. A single Blink account works across publishers, giving readers one universal login and frictionless payment so they can subscribe, donate, or buy an individual article or podcast with one click, or enable autopay for small frequent purchases. Publishers integrate three products — Blink Identity, Blink Pay and Blink Donate — through one hosted JavaScript SDK that places Blink-managed panels into the page, a dashboard-configured User Journeys rules engine, four server-side JSON endpoints for OAuth2 login, and a signed webhook notification stream covering subscription, payment and donation events. Founded 2017; incorporated in the US in 2018 and surfaced in the API Evangelist network as a Polychain portfolio company.

Blink Ledger Systems publishes 3 APIs on the APIs.io network: Authentication API, OAuth Applications API, and Users API. Tagged areas include Company, Infrastructure, Payments, Identity, and Authentication.

The Blink Ledger Systems catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Blink Ledger Systems’ developer surface includes documentation, API reference, getting-started guide, support, signup flow, authentication, sandbox, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.6/100 developing ▬ flat Agent 45/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

5 APIs

CompanyInfrastructurePaymentsIdentityAuthenticationOAuthPublishingMediaSubscriptionsDonationsMicropaymentsPaywallWebhooks

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 50.6/100 · developing

Contract Quality 16.2 / 25

Developer Ergonomics 13.9 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 3.1 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 45/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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/blink-ledger-systems: 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 5

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

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

Conventions

Lifecycle

Components

DataModel

Webhooks

Conformance

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: blink-ledger-systems
name: Blink Ledger Systems
description: Blink (Blink Ledger Systems Inc.) builds online identity and payment technologies for digital publishers. A single
  Blink account works across publishers, giving readers one universal login and frictionless payment so they can subscribe,
  donate, or buy an individual article or podcast with one click, or enable autopay for small frequent purchases. Publishers
  integrate three products — Blink Identity, Blink Pay and Blink Donate — through one hosted JavaScript SDK that places Blink-managed
  panels into the page, a dashboard-configured User Journeys rules engine, four server-side JSON endpoints for OAuth2 login,
  and a signed webhook notification stream covering subscription, payment and donation events. Founded 2017; incorporated
  in the US in 2018 and surfaced in the API Evangelist network as a Polychain portfolio company.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://blink.net/resources/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/blink-ledger-systems/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- polychain
x-tier: profiled
x-tier-reason: enriched-from-public-docs
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Infrastructure
- Payments
- Identity
- Authentication
- OAuth
- Publishing
- Media
- Subscriptions
- Donations
- Micropayments
- Paywall
- Webhooks
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: blink-ledger-systems-sdk
  name: Blink SDK for JavaScript
  description: Browser SDK exposing window.blinkSDK. Provides Login with Blink (getAuthorizationCode), subscription entitlement
    checks (isSubscribed, getSubscription, onSubscriptionChange), single-article charging (requestPayment), hosted donation
    and subscription modals, and the variables/functions extension points that dashboard-configured User Journeys evaluate
    against.
  humanURL: https://docs.blink.net/docs/api-reference/load-blink-sdk.html
  baseURL: https://blink.net/1.0
  tags:
  - Payments
  - Identity
  - Subscriptions
  - Donations
  properties:
  - type: Documentation
    url: https://docs.blink.net/docs/api-reference/load-blink-sdk.html
  - type: APIReference
    url: https://docs.blink.net/docs/api-reference/functions.html
  - type: SDKs
    url: packages/blink-ledger-systems-packages.yml
  - type: Components
    url: components/blink-ledger-systems-components.yml
- aid: blink-ledger-systems-notifications
  name: Blink Notifications (Webhooks)
  description: Outbound webhook stream delivering signed JSON notifications for subscription, payment and donation lifecycle
    events. Every payload is signed with ed25519 over the canonicalized event object, with an optional Blink-Echo-Token shared-secret
    header.
  humanURL: https://docs.blink.net/docs/notifications/webHooks.html
  baseURL: https://api.blink.net
  tags:
  - Webhooks
  - Events
  - Payments
  properties:
  - type: Webhooks
    url: asyncapi/blink-ledger-systems-notifications-webhooks.yml
  - type: Documentation
    url: https://docs.blink.net/docs/notifications/webHooks.html
- aid: blink-ledger-systems:blink-ledger-systems-authentication-api
  name: Blink Ledger Systems Authentication API
  description: Client account login and bearer token issuance.
  humanURL: https://docs.blink.net/docs/server-side-api/api-overview.html
  baseURL: https://api.blink.net
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/blink-ledger-systems-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: APIReference
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: Authentication
    url: authentication/blink-ledger-systems-authentication.yml
  - type: ErrorCatalog
    url: errors/blink-ledger-systems-problem-types.yml
- aid: blink-ledger-systems:blink-ledger-systems-oauth-applications-api
  name: Blink Ledger Systems OAuth Applications API
  description: Registration and retrieval of OAuth application credentials.
  humanURL: https://docs.blink.net/docs/server-side-api/api-overview.html
  baseURL: https://api.blink.net
  tags:
  - OAuth Applications
  properties:
  - type: OpenAPI
    url: openapi/blink-ledger-systems-oauth-applications-api-openapi.yml
  - type: Documentation
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: APIReference
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: Authentication
    url: authentication/blink-ledger-systems-authentication.yml
  - type: ErrorCatalog
    url: errors/blink-ledger-systems-problem-types.yml
- aid: blink-ledger-systems:blink-ledger-systems-users-api
  name: Blink Ledger Systems Users API
  description: Blink user profile exchange.
  humanURL: https://docs.blink.net/docs/server-side-api/api-overview.html
  baseURL: https://api.blink.net
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/blink-ledger-systems-users-api-openapi.yml
  - type: Documentation
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: APIReference
    url: https://docs.blink.net/docs/server-side-api/api-overview.html
  - type: Authentication
    url: authentication/blink-ledger-systems-authentication.yml
  - type: ErrorCatalog
    url: errors/blink-ledger-systems-problem-types.yml
common:
- type: Website
  url: https://blink.net
- type: DeveloperPortal
  url: https://docs.blink.net/
- type: Documentation
  url: https://docs.blink.net/docs/getting-started/overview.html
- type: APIReference
  url: https://docs.blink.net/docs/api-reference/functions.html
- type: GettingStarted
  url: https://docs.blink.net/docs/getting-started/quick-start.html
- type: Support
  url: https://docs.blink.net/docs/getting-started/support.html
- type: SignUp
  url: https://blink.net/login
- type: TermsOfService
  url: https://blink.net/terms
- type: PrivacyPolicy
  url: https://blink.net/privacy-policy
- type: StatusPage
  url: https://status.blink.net
- type: OpenAPI
  url: openapi/blink-ledger-systems-server-side-api-openapi.yml
- type: Overlay
  url: overlays/blink-ledger-systems-server-side-api-overlay.yaml
- type: Packages
  url: packages/blink-ledger-systems-packages.yml
- type: SDKs
  url: packages/blink-ledger-systems-packages.yml
- type: Authentication
  url: authentication/blink-ledger-systems-authentication.yml
- type: ErrorCatalog
  url: errors/blink-ledger-systems-problem-types.yml
- type: Conventions
  url: conventions/blink-ledger-systems-conventions.yml
- type: Lifecycle
  url: lifecycle/blink-ledger-systems-lifecycle.yml
- type: Sandbox
  url: sandbox/blink-ledger-systems-sandbox.yml
- type: Components
  url: components/blink-ledger-systems-components.yml
- type: DataModel
  url: data-model/blink-ledger-systems-data-model.yml
- type: Webhooks
  url: asyncapi/blink-ledger-systems-notifications-webhooks.yml
- type: Conformance
  url: conformance/blink-ledger-systems-conformance.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/blink-ledger-systems-llms.txt
- type: DomainSecurity
  url: security/blink-ledger-systems-domain-security.yml
x-not-published:
  notes: 'Probed and confirmed absent, recorded so later runs do not re-search: no /.well-known/ documents on any host (all
    soft-404 — see well-known/blink-ledger-systems-well-known.yml), no llms.txt, no robots.txt, no AsyncAPI document, no public
    GitHub organization, no MCP server (a candidate tool list is derived in mcp/), no CLI, no changelog or release notes,
    no roadmap, no pricing page, no blog, no Postman collection, no published rate limits, no OAuth scope registry, no security.txt
    or vulnerability disclosure program, no trust center or named certifications, and no decline-code reference. Deliberately
    no Idempotency, Deprecation, Security, Compliance, MCPServer or WellKnown pointer is wired, because Blink publishes none
    of those things.'
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 19
  pass: local-v1

Blink Ledger Systems

Kin Score

APIs 5

Blink SDK for JavaScript

Blink Notifications (Webhooks)

Blink Ledger Systems Authentication API

Blink Ledger Systems OAuth Applications API

Blink Ledger Systems Users API

Event Specifications 1

Blink Ledger Systems Notifications Webhooks

Security Posture 2

Blink Ledger Systems Authentication

Blink Ledger Systems Domain Security

Resources