Is uk.co.postio/postcode-address-validation safe to use?

uk.co.postio/postcode-address-validation has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.

How do I install uk.co.postio/postcode-address-validation?

uk.co.postio/postcode-address-validation supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What AI clients work with uk.co.postio/postcode-address-validation?

uk.co.postio/postcode-address-validation is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is uk.co.postio/postcode-address-validation actively maintained?

uk.co.postio/postcode-address-validation is actively maintained — last commit was 10 days ago.

uk.co.postio/postcode-address-validation

@postio/mcp

Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.

81/wk GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 10d ago

Works with most clients

Transport: stdio, sse, http

0 tools

Grade F

MCPpedia last refreshed this data 11h ago

Edit this pageView history

uk.co.postio/postcode-address-validation is an MCP server that validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 57/100 on MCPpedia's security, maintenance and efficiency rubric.

Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "uk-co-postio-postcode-address-validation": {
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/uk-co-postio-postcode-address-validation)](https://mcppedia.org/s/uk-co-postio-postcode-address-validation)

Read me

What uk.co.postio/postcode-address-validation does

Postio is the UK validation API for addresses, emails and phone numbers. This repo holds the JS-family npm packages, the AI / agent surface, and the cdn.postio.co.uk Worker that powers

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@postio/mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

57/100across 5 weighted dimensions

How we score →

0255075100

−43

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @postio/mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is uk.co.postio/postcode-address-validation safe to use?: uk.co.postio/postcode-address-validation has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install uk.co.postio/postcode-address-validation?: uk.co.postio/postcode-address-validation supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with uk.co.postio/postcode-address-validation?: uk.co.postio/postcode-address-validation is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is uk.co.postio/postcode-address-validation actively maintained?: uk.co.postio/postcode-address-validation is actively maintained — last commit was 10 days ago.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

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Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "uk-co-postio-postcode-address-validation": {
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/uk-co-postio-postcode-address-validation)](https://mcppedia.org/s/uk-co-postio-postcode-address-validation)

Read me

What uk.co.postio/postcode-address-validation does

Postio is the UK validation API for addresses, emails and phone numbers. This repo holds the JS-family npm packages, the AI / agent surface, and the cdn.postio.co.uk Worker that powers

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@postio/mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

postio-integrations

Postio is the UK validation API for addresses, emails and phone numbers. This repo holds the JS-family npm packages, the AI / agent surface, and the cdn.postio.co.uk Worker that powers Postio's browser drop-in.

First time? Sign up free — first 100 lookups on us, no card needed.

The Postio API + OpenAPI spec live in postio-uk/postio-api. The spec is also published as @postio/openapi.

Packages

Package	What it is
`@postio/api-types`	TypeScript types generated from the OpenAPI spec.
`@postio/core`	Runtime-agnostic typed client (browser / Node / Workers / Bun / Deno).
`@postio/node`	Node SDK on top of `core` — retries with exponential backoff, structured logger hook.
`@postio/postman-collection`	Postman v2.1 collection for every endpoint.
`@postio/address-finder`	Browser address autocomplete — ARIA combobox, themable, framework-agnostic source.
`@postio/address-finder-bundled`	The same component prebuilt for `<script>` tag use.
`@postio/react`	React hooks + `<AddressFinder />` component, TanStack Query under the hood.
`@postio/mcp`	Model Context Protocol server — `npx -y @postio/mcp` for Claude Desktop / Cursor / Windsurf / Zed.

Layout

packages/         pnpm workspace; one publishable npm package per subdir
ai/               AI / agent surface (Claude Skill, GPT Action, recommendation prompts)
cdn-worker/       Cloudflare Worker that serves the address-finder bundles
.github/workflows/  CI for publishing + deploying

Building

cd packages
pnpm install
pnpm -r run build

Each package builds independently (pnpm -F @postio/<name> run build). The address-finder bundle has a topological-build quirk — use the ... suffix so its workspace dep builds first:

pnpm -F "@postio/address-finder-bundled..." run build

Contributing

PRs welcome. Conventions:

Node 22+, pnpm 10+, ESM only, MIT-licensed.
stage is the working branch; master deploys / publishes via CI.
One package change per PR where possible.
Versions on each package are independent SemVer; bump the version in package.json when you intend a release.

The full integration index — including the server SDKs in their own repos and the WordPress plugin — lives at postio.co.uk/integrations.

License

MIT.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

57/100across 5 weighted dimensions

How we score →

0255075100

−43

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @postio/mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is uk.co.postio/postcode-address-validation safe to use?: uk.co.postio/postcode-address-validation has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install uk.co.postio/postcode-address-validation?: uk.co.postio/postcode-address-validation supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with uk.co.postio/postcode-address-validation?: uk.co.postio/postcode-address-validation is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is uk.co.postio/postcode-address-validation actively maintained?: uk.co.postio/postcode-address-validation is actively maintained — last commit was 10 days ago.