# Nook

**Canonical:** https://apis.io/providers/nook/  
**Website:** https://nook.io  
**APIs profiled:** 0

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.

## Kin Score — 2.9 / 100 (minimal)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 2.9).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 6.6 |
| Access Clarity | 6.6 |

Regulatory layer — **Payments**: 9.4 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Nook Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Fintech, Accounts Payable, Payments, Invoice Automation, Spend Management, B2B, Financial Operations

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/nook/). Scores are computed from the provider's own public artifacts under a published rubric.