bankday-dev

Bankday provides a Business Day & Bank Holiday API covering ACH, Fedwire, NYSE, and over 240 countries. It offers calendar data, settlement dates, and value date calculations for payments, payroll, lending, and trading systems. The service includes a free tier with 1,000 requests per month and paid plans starting at $19/mo, delivering low-latency responses from a global edge network.

bankday-dev publishes 10 API contracts indexed on the APIs.io network, including Account API, Ach API, Business Day API, and 7 more. Tagged areas include Company, Finance, Calendar, API, and Payments.

The bankday-dev catalog on APIs.io includes 1 Spectral governance ruleset.

bankday-dev’s developer surface includes pricing, API reference, authentication, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

45.0/100 developing Agent 32/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

Company Finance CalendarAPIPayments

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 45.0/100 · developing

Contract Quality 10.5 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 10.2 / 17

Operational Transparency 1.7 / 11

Contract Governance 6.7 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.3 / 15

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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

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 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):

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)
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)
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

7 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 19.0 — up to +16.2 composite points
Contract Quality scores 49.2 — up to +12.7 composite points
Operational Transparency scores 15.8 — up to +10.9 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/bankday-dev/apis.yml: open an issue on github.com/api-evangelist/bankday-dev 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 10

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

bankday-dev Account API

The Account API from bankday-dev — 1 operation(s) for account.

bankday-dev Ach API

The Ach API from bankday-dev — 1 operation(s) for ach.

bankday-dev Business Day API

The Business Day API from bankday-dev — 1 operation(s) for business day.

bankday-dev Business Days API

The Business Days API from bankday-dev — 5 operation(s) for business days.

bankday-dev Calendars API

The Calendars API from bankday-dev — 1 operation(s) for calendars.

bankday-dev Fx API

The Fx API from bankday-dev — 1 operation(s) for fx.

bankday-dev Holidays API

The Holidays API from bankday-dev — 1 operation(s) for holidays.

bankday-dev Minimum Wage API

The Minimum Wage API from bankday-dev — 3 operation(s) for minimum wage.

bankday-dev Payroll API

The Payroll API from bankday-dev — 1 operation(s) for payroll.

bankday-dev Today API

The Today API from bankday-dev — 1 operation(s) for today.

Scroll for all 10

Pricing Plans 1

Published pricing tiers and plan structures.

Bankday Dev Plans Pricing

5 plans

PLANS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

bankday-dev API Rules

14 rules · 12 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Bankday Dev Authentication

http · 1 scheme

SECURITY

Bankday Dev Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Bankday Dev Agentic Access

16 operations

16 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

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: bankday-dev
name: bankday-dev
description: Bankday provides a Business Day & Bank Holiday API covering ACH, Fedwire, NYSE, and over 240 countries. It offers
  calendar data, settlement dates, and value date calculations for payments, payroll, lending, and trading systems. The service
  includes a free tier with 1,000 requests per month and paid plans starting at $19/mo, delivering low-latency responses from
  a global edge network.
url: https://artifacts.apis.io/bankday-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- Finance
- Calendar
- API
- Payments
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://bankday.dev/assets/og.png
common:
- type: AgenticAccess
  url: agentic-access/bankday-dev-agentic-access.yml
- type: Plans
  url: plans/bankday-dev-plans-pricing.yml
- type: Spectral
  url: rules/bankday-dev-rules.yml
- type: ErrorCatalog
  url: errors/bankday-dev-problem-types.yml
- type: Conformance
  url: conformance/bankday-dev-conformance.yml
- type: LLMsTxt
  url: llms/bankday-dev-llms.txt
- type: Hosts
  url: hosts/bankday-dev-hosts.yml
- type: Vendors
  url: vendors/bankday-dev-vendors.yml
- type: TermsOfService
  url: https://bankday.dev/terms
- type: StatusPage
  url: https://bankday.dev/status
- type: PrivacyPolicy
  url: https://bankday.dev/privacy
- type: Pricing
  url: https://bankday.dev/pricing
- type: APIReference
  url: https://bankday.dev/docs
- type: Authentication
  url: authentication/bankday-dev-authentication.yml
- type: DomainSecurity
  url: security/bankday-dev-domain-security.yml
- type: Website
  url: https://bankday.dev/
apis:
- aid: bankday-dev:bankday-dev-account-api
  name: bankday-dev Account API
  description: The Account API from bankday-dev — 1 operation(s) for account.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-account-api-openapi.yml
- aid: bankday-dev:bankday-dev-ach-api
  name: bankday-dev Ach API
  description: The Ach API from bankday-dev — 1 operation(s) for ach.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Ach
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-ach-api-openapi.yml
- aid: bankday-dev:bankday-dev-business-day-api
  name: bankday-dev Business Day API
  description: The Business Day API from bankday-dev — 1 operation(s) for business day.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Business Day
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-business-day-api-openapi.yml
- aid: bankday-dev:bankday-dev-business-days-api
  name: bankday-dev Business Days API
  description: The Business Days API from bankday-dev — 5 operation(s) for business days.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Business Days
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-business-days-api-openapi.yml
- aid: bankday-dev:bankday-dev-calendars-api
  name: bankday-dev Calendars API
  description: The Calendars API from bankday-dev — 1 operation(s) for calendars.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Calendars
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-calendars-api-openapi.yml
- aid: bankday-dev:bankday-dev-fx-api
  name: bankday-dev Fx API
  description: The Fx API from bankday-dev — 1 operation(s) for fx.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Fx
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-fx-api-openapi.yml
- aid: bankday-dev:bankday-dev-holidays-api
  name: bankday-dev Holidays API
  description: The Holidays API from bankday-dev — 1 operation(s) for holidays.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Holidays
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-holidays-api-openapi.yml
- aid: bankday-dev:bankday-dev-minimum-wage-api
  name: bankday-dev Minimum Wage API
  description: The Minimum Wage API from bankday-dev — 3 operation(s) for minimum wage.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Minimum Wage
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-minimum-wage-api-openapi.yml
- aid: bankday-dev:bankday-dev-payroll-api
  name: bankday-dev Payroll API
  description: The Payroll API from bankday-dev — 1 operation(s) for payroll.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Payroll
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-payroll-api-openapi.yml
- aid: bankday-dev:bankday-dev-today-api
  name: bankday-dev Today API
  description: The Today API from bankday-dev — 1 operation(s) for today.
  humanURL: https://bankday.dev/docs
  baseURL: https://bankday.dev
  tags:
  - Today
  properties:
  - type: OpenAPI
    url: openapi/bankday-dev-today-api-openapi.yml
x-coverage:
  state: gated
  reason: partner-login
  method: derived
  generated: '2026-10-30'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company serves an API surface but requires credentials before any description of it can be read
  evidence:
  - url: https://bankday.dev/openapi.json
    status: null
  - url: https://bankday.dev/mcp
    status: 401
  - url: https://bankday.dev/
    status: 200
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

bankday-dev API — frequently asked questions

Does bankday-dev have an API?

Yes. APIs.io lists 10 APIs from bankday-dev, including bankday-dev Account API, bankday-dev Ach API and bankday-dev Business Day API, and 7 more.

Is there an OpenAPI specification for the bankday-dev API?

Yes. APIs.io indexes 10 OpenAPI specifications for bankday-dev, each linked for download from this page.

How do I authenticate with the bankday-dev API?

bankday-dev uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Bankday Dev Authentication.

How much does the bankday-dev API cost?

APIs.io lists 5 pricing plans for bankday-dev, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the bankday-dev API ready for AI agents?

bankday-dev has a Kin Score of 45.0 out of 100 (developing) and an Agent Readiness score of 31.9 (agent-ready), scored by API Evangelist on 2026-10-31.

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