# GOV.UK Notify

**Canonical:** https://apis.io/providers/gov-uk-notify/  
**Website:** https://www.notifications.service.gov.uk/  
**APIs profiled:** 9

GOV.UK Notify is a UK government notification service operated by the Government Digital Service (GDS) that enables central government, local authorities, NHS organisations, and other eligible public bodies to send emails, text messages, and letters to citizens on behalf of government services. The platform provides a REST API, a web-based sending interface, and official client libraries for Python, Java, .NET, Node.js, PHP, and Ruby. Emails are free and unlimited; SMS messages include an annual free allowance by organisation type with per-message overage at 2.4p; physical letters are priced by postage class and page count with print and postage included. The API uses JWT-based authentication, supports template-driven personalisation, and enforces a throughput limit of 3,000 messages per minute per API key type.

## Kin Score — 45.4 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 45.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.8 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 28.6 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

Regulatory layer — **Government & Public Sector**: 33.3 (matched via tags).

## Agent readiness — 32.1 (agent-aware)

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

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (9)

- **GOV.UK Notify Python Client** — Official Python client library for the GOV.UK Notify API. Wraps the REST API with idiomatic Python methods for sending SMS, email, and letter notifications; retrieving notificat...
- **GOV.UK Notify Java Client** — Official Java client library for the GOV.UK Notify API, providing methods for sending emails, SMS messages, and letters, as well as retrieving notification statuses and managing...
- **GOV.UK Notify .NET Client** — Official .NET client library for the GOV.UK Notify API supporting C# and other .NET languages for sending government notifications via email, SMS, and letters.
- **GOV.UK Notify Node.js Client** — Official Node.js client library for the GOV.UK Notify API for sending government notifications via email, SMS, and letters from JavaScript and TypeScript applications.
- **GOV.UK Notify PHP Client** — Official PHP client library for the GOV.UK Notify API for sending government notifications via email, SMS, and letters from PHP applications.
- **GOV.UK Notify Ruby Client** — Official Ruby client library for the GOV.UK Notify API for sending government notifications via email, SMS, and letters from Ruby and Ruby on Rails applications.
- **GOV.UK Notify Notifications API** — Send and retrieve notifications (email, SMS, letters)
- **GOV.UK Notify Received Text Messages API** — Retrieve inbound text messages
- **GOV.UK Notify Templates API** — Retrieve and preview notification templates

## Agentic access (1)

- **Gov Uk Notify Agentic Access** — 11 operations · 4 acting

## Security (3)

- **Gov Uk Notify Authentication** — http · 1 scheme
- **Gov Uk Notify Domain Security** — TLSv1.3 · HSTS · DMARC
- **Gov Uk Notify Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Plans (1)

- **Plans**

## Tags

Notification, Email, SMS, Text Messages, Letters, Government, United Kingdom, Public Sector, GDS, REST

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