Nook

Nook is an accounts payable (AP) automation platform for businesses, combining invoice management with automated payment workflows to reduce manual data entry, cut errors, and give finance teams clearer visibility over outgoings. Founded in the UK and backed by Speedinvest as an early investor, Nook was acquired by payments infrastructure provider Modulr; its product now operates as "Modulr AP" and its former standalone site at nook.io presents the combined Modulr AP offering. Nook does not publish an independent public developer platform, API reference, or SDKs — the payment rails are provided through Modulr's platform — so this profile is maintained as a company record rather than an API-bearing provider.

Nook is profiled on the APIs.io network. Tagged areas include Company, Fintech, Accounts Payable, Payments, and Invoice Automation.

🌐 Visit website 📡 Source on GitHub
9.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyFintechAccounts PayablePaymentsInvoice AutomationSpend ManagementB2BFinancial Operations

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 9.9/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 2.6 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 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/nook: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Nook Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: nook
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nook.png
name: Nook
description: Nook is an accounts payable (AP) automation platform for businesses, combining invoice management with automated
  payment workflows to reduce manual data entry, cut errors, and give finance teams clearer visibility over outgoings. Founded
  in the UK and backed by Speedinvest as an early investor, Nook was acquired by payments infrastructure provider Modulr;
  its product now operates as "Modulr AP" and its former standalone site at nook.io presents the combined Modulr AP offering.
  Nook does not publish an independent public developer platform, API reference, or SDKs — the payment rails are provided
  through Modulr's platform — so this profile is maintained as a company record rather than an API-bearing provider.
url: https://raw.githubusercontent.com/api-evangelist/nook/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- speedinvest
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: modulr
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Fintech
- Accounts Payable
- Payments
- Invoice Automation
- Spend Management
- B2B
- Financial Operations
common:
- type: DomainSecurity
  url: security/nook-domain-security.yml
- type: Website
  url: https://nook.io
- type: Login
  url: https://app.modulrfinance.com
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io