Highnote

Highnote is a modern, unified embedded-finance and banking-as-a-service platform for card issuing, card acquiring, credit, and real-time money movement, with a built-in real-time programmable ledger and full program management. The entire platform is driven by a single GraphQL API at https://api.us.highnote.com/graphql (test https://api.us.test.highnote.com/graphql), authenticated with a base64-encoded API key over HTTP Basic auth. One endpoint covers card products, US person and business account holders (KYC/KYB onboarding), financial accounts and credit lines, virtual/physical/tokenized payment cards, transaction authorization and clearing, disputes, spend and velocity rules, collaborative authorization, multi-rail money movement (ACH, wire, RTP, push-to-card), and outbound webhook event notifications. Highnote is a US-based platform serving digital-first businesses embedding financial products; access is enterprise, contract-gated, with self-serve dashboard signup and a test environment.

Highnote publishes 1 API on the APIs.io network: Graph QL API. Tagged areas include Card Issuing, Card Acquiring, Embedded Finance, Banking as a Service, and Fintech.

The Highnote catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Highnote’s developer surface includes API reference, authentication, documentation, engineering blog, pricing, support, getting-started guide, and 38 more developer resources.

🌐 Visit website 📡 Source on GitHub

67.0/100 exemplar ▬ flat Agent 33/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessEnterprise

1 APIs

Card IssuingCard AcquiringEmbedded Finance Banking as a Service Fintech Payments GraphQL Ledger Credit Money Movement ACH KYC United States

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 67.0/100 · exemplar

Contract Quality 11.6 / 19

Developer Ergonomics 11.2 / 15

Access Clarity 11.9 / 15

Operational Transparency 6.7 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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

Regulatory Posture applies to this provider. Its tags matched the Payments 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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 github.com/api-evangelist/highnote: open an issue to ask a question, or submit a pull request to add artifacts. 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.

Highnote Graph QL API

Single GraphQL endpoint for all Highnote operations.

Postman Collections 1

Ready-to-run Postman collections for exercising this provider's APIs.

Highnote GraphQL API

POSTMAN

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Highnote GraphQL API

OPEN COLLECTION

Highnote GraphQL API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Highnote GraphQL API

The [Highnote](https://highnote.com/) embedded-finance platform exposes a **single GraphQL

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Highnote Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Highnote Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Highnote Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Highnote Event Notifications

Highnote delivers event notifications to registered HTTPS webhook notification targets (addWebhookNotificationTarget) via outbound POST. Subscribe a target to event types with a...

ASYNCAPI

Security Posture 2

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

Highnote Authentication

http · 1 scheme

SECURITY

Highnote Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Highnote Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Signup

Sandbox

Documentation 3

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

AsyncAPI

AsyncAPI

Agent Surfaces 6

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

AgenticAccess

AgenticAccess

X-MCPServerCandidate

LLMsTxt

WellKnown

AgentSkills

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Idempotency

Components

DataModel

Webhooks

Scroll for all 8

Build 7

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

Packages

SDKs

ToolCrosswalk

DeclineCodes

Scroll for all 7

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Compliance

Compliance

Operate 5

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

RateLimits

RateLimits

DeprecationPolicy

DeprecationPolicy

ChangeLog

ChangeLog

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: highnote
url: https://raw.githubusercontent.com/api-evangelist/highnote/refs/heads/main/apis.yml
name: Highnote
kind: company
description: Highnote is a modern, unified embedded-finance and banking-as-a-service platform for card issuing, card acquiring,
  credit, and real-time money movement, with a built-in real-time programmable ledger and full program management. The entire
  platform is driven by a single GraphQL API at https://api.us.highnote.com/graphql (test https://api.us.test.highnote.com/graphql),
  authenticated with a base64-encoded API key over HTTP Basic auth. One endpoint covers card products, US person and business
  account holders (KYC/KYB onboarding), financial accounts and credit lines, virtual/physical/tokenized payment cards, transaction
  authorization and clearing, disputes, spend and velocity rules, collaborative authorization, multi-rail money movement (ACH,
  wire, RTP, push-to-card), and outbound webhook event notifications. Highnote is a US-based platform serving digital-first
  businesses embedding financial products; access is enterprise, contract-gated, with self-serve dashboard signup and a test
  environment.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: high
  source:
  - plans
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/highnote.png
tags:
- Card Issuing
- Card Acquiring
- Embedded Finance
- Banking as a Service
- Fintech
- Payments
- GraphQL
- Ledger
- Credit
- Money Movement
- ACH
- KYC
- United States
tags_raw:
- Card Issuing
- Card Acquiring
- Embedded Finance
- Banking-as-a-Service
- Fintech
- Payments
- GraphQL
- Ledger
- Credit
- Money Movement
- ACH
- KYC
- United States
created: '2026-06-20'
modified: '2026-07-23'
specificationVersion: '0.23'
apis:
- aid: highnote:highnote-graph-ql-api
  name: Highnote Graph QL API
  description: Single GraphQL endpoint for all Highnote operations.
  humanURL: https://docs.highnote.com/docs/issuing/about-issuing
  baseURL: https://api.us.highnote.com/graphql
  tags:
  - GraphQL
  tags_raw:
  - Graph QL
  properties:
  - type: OpenAPI
    url: openapi/highnote-graph-ql-api-openapi.yml
  - type: Documentation
    url: https://docs.highnote.com/docs/issuing/about-issuing
  - type: APIReference
    url: https://docs.highnote.com/docs/api-reference/mutation
  - type: GraphQL
    url: graphql/highnote-graphql.md
  - type: Documentation
    url: https://docs.highnote.com/docs/issuing/templates/consumer-prepaid
  - type: Documentation
    url: https://docs.highnote.com/docs/issuing/accounts/onboarding/onboard-an-account
  - type: APIReference
    url: https://docs.highnote.com/docs/api-reference/object
  - type: Documentation
    url: https://docs.highnote.com/docs/acquiring/about-acquiring
  - type: Documentation
    url: https://docs.highnote.com/docs/money-movement/about-money-movement
  - type: Documentation
    url: https://docs.highnote.com/docs/money-movement/payment-rails/transfer-funds-api
  - type: Documentation
    url: https://docs.highnote.com/docs/issuing/transactions/transaction-lifecycle
  - type: APIReference
    url: https://docs.highnote.com/docs/api-reference/query
  - type: Documentation
    url: https://docs.highnote.com/docs/issuing/spend-controls/collaborative-authorization
  - type: Documentation
    url: https://docs.highnote.com/docs/developers/about-developers
common:
- type: AgentSkill
  url: skills/highnote-accept-a-payment.md
- type: APIReference
  url: https://docs.highnote.com/docs/tags/api
- type: SDKs
  url: https://docs.highnote.com/docs/developers/sdks/about-sdks
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/highnote/overview
- type: AgenticAccess
  url: agentic-access/highnote-agentic-access.yml
- type: DomainSecurity
  url: security/highnote-domain-security.yml
- type: Authentication
  url: authentication/highnote-authentication.yml
- type: Website
  url: https://highnote.com
- type: DeveloperPortal
  url: https://docs.highnote.com/docs/developers/about-developers
- type: Documentation
  url: https://docs.highnote.com
- type: GitHubOrganization
  url: https://github.com/Highnote-Platform
- type: LinkedIn
  url: https://www.linkedin.com/company/highnote-platform
- type: Blog
  url: https://highnote.com/blog
- type: Pricing
  url: https://highnote.com/pricing
- type: TermsOfService
  url: https://highnote.com/agreements/terms/01-05-22
- type: PrivacyPolicy
  url: https://highnote.com/agreements/privacy
- type: Support
  url: https://support.highnote.com/hc/en-us
- type: StatusPage
  url: https://status.highnote.com
- type: GettingStarted
  url: https://docs.highnote.com/docs/get-started/about-highnote
- type: Signup
  url: https://dashboard.highnote.com
- type: Plans
  url: plans/highnote-plans-pricing.yml
- type: RateLimits
  url: rate-limits/highnote-rate-limits.yml
- type: FinOps
  url: finops/highnote-finops.yml
- type: Packages
  url: packages/highnote-packages.yml
- type: SDKs
  url: packages/highnote-packages.yml
- type: X-MCPServerCandidate
  url: mcp/highnote-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: ToolCrosswalk
  url: mcp/highnote-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/highnote-llms.txt
- type: WellKnown
  url: well-known/highnote-well-known.yml
- type: Overlay
  url: overlays/highnote-graphql-api-overlay.yaml
- type: Conformance
  url: conformance/highnote-conformance.yml
- type: Compliance
  url: https://docs.highnote.com/docs/get-started/introduction/pci-dss-compliance
- type: ErrorCatalog
  url: errors/highnote-problem-types.yml
- type: DeclineCodes
  url: errors/highnote-decline-codes.yml
- type: Lifecycle
  url: lifecycle/highnote-lifecycle.yml
- type: DeprecationPolicy
  url: https://docs.highnote.com/docs/developers/api/status-changes
- type: Conventions
  url: conventions/highnote-conventions.yml
- type: Idempotency
  url: conventions/highnote-conventions.yml
- type: ChangeLog
  url: changelog/highnote-changelog.yml
- type: Sandbox
  url: sandbox/highnote-sandbox.yml
- type: Components
  url: components/highnote-components.yml
- type: DataModel
  url: data-model/highnote-data-model.yml
- type: AsyncAPI
  url: asyncapi/highnote-events-asyncapi.yml
- type: Webhooks
  url: asyncapi/highnote-events-asyncapi.yml
- type: AgentSkills
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/highnote"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/highnote/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/highnote/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.