UK Data API vs Postio — UK Address, Postcode, Email & Phone Validation
UK Data API is an MCP server published by chetparker. Marketplaces we read that list it: 1 (Official MCP Registry). Postio — UK Address, Postcode, Email & Phone Validation is an MCP server published by postio.co.uk. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-19. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |   Postio — UK Address, Postcode, Email & Phone Validation | |
|---|---|---|
| Official MCP Registry | Listed Version: 2.0.0 No figure published Not marked · First seen |
Listed Version: 0.1.4 Downloads/month (npm): 125 Downloads/week (npm): 20 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | UK Data API | Postio — UK Address, Postcode, Email & Phone Validation |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | No figure on GitHub | 0 |
| Forks (GitHub) (differs) | No figure on GitHub | 0 |
| Last release | Not published | Not published |
| Where it runs (differs) | Remote server (web-production-18a32.up.railway.app/mcp/sse) | On your machine (@postio/mcp) |
| Transport (differs) | SSE | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/chetparker/uk-property-api | github.com/postio-uk/postio-integrations |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 21 h ago | no remote endpoint we check |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
UK Data API
24 UK data endpoints — property, weather, companies, vehicles, finance. Paid via x402.
Postio — UK Address, Postcode, Email & Phone Validation
Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.
How to run each
UK Data API As a remote MCP server
claude mcp add --transport sse uk-data-api https://web-production-18a32.up.railway.app/mcp/ssePostio — UK Address, Postcode, Email & Phone Validation As a local MCP server: npm package
claude mcp add --env "POSTIO_API_KEY=<YOUR_POSTIO_API_KEY>" --transport stdio postcode-address-validation -- npx -y @postio/mcpRequires: POSTIO_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only UK Data API has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of UK Data API publish no settings it asks for, so we do not compare settings.
What it can do: UK Data API · What it can do: Postio — UK Address, Postcode, Email & Phone Validation · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.