Postio — UK Address, Postcode, Email & Phone Validation
NPM · @POSTIO/MCP · SCANNED AUG 17
Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 30 of 97 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 2 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability82
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 509 tokens (~84/item across 6 items; 6 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Unverified: 1 category
A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
npm · @postio/mcp
claude mcp add uk-co-postio-postcode-address-validation -- npx -y @postio/mcp
codex mcp add uk-co-postio-postcode-address-validation -- npx -y @postio/mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"uk-co-postio-postcode-address-validation": {
"type": "local",
"command": [
"npx",
"-y",
"@postio/mcp"
],
"enabled": true
}
}
} openclaw mcp add uk-co-postio-postcode-address-validation --command npx --arg -y --arg @postio/mcp
mcp_servers:
uk-co-postio-postcode-address-validation:
command: "npx"
args: ["-y", "@postio/mcp"] {
"mcpServers": {
"uk-co-postio-postcode-address-validation": {
"command": "npx",
"args": [
"-y",
"@postio/mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 17 Aug 26 0
- Security disclosure: unverified → fail ▼ functional
- 16 Aug 26 0
- Security disclosure: fail → unverified ▼ functional
- 14 Aug 26 70
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 17 Aug 2026 · Analysed npm/@postio/mcp@0.1.4
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Dependencies 97 packages
| Packages resolved | 97 |
|---|---|
| Stale | 30 |
| Tree resolution | Complete |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
postio_address_search ~118
Search UK addresses by free-form text — building, street, postcode, organisation, or any combination. Returns a list of suggestions, each with a UDPRN (Royal Mail's per-address ID). Pass a chosen UDPRN to `postio_udprn_lookup` to fetch the full record. Free / non-billable.
| Name | Type | Req | Description |
|---|---|---|---|
| max_results | integer | – | Max results to return. Default 10, max 50. |
| query | string | yes | Search string. Free-form: building, street, postcode, organisation. |
No output schema declared.
No examples provided.
postio_connect ~43
Free key/health probe. Returns 200 if the API key is active and the upstream search service is reachable. Useful as a smoke test or to warm the worker.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
postio_email_validate ~88
Validate an email address: syntax (RFC 5322), typo correction (gnail→gmail), classification (disposable, role, free provider), MX lookup, and live SMTP mailbox probe. Returns an aggregated `deliverability` verdict (deliverable / undeliverable / risky / unknown / invalid) plus every signal independently.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | Email address to validate. |
No output schema declared.
No examples provided.
postio_phone_validate ~91
Parse a phone number with libphonenumber and run a live HLR (Home Location Register) lookup. Returns current carrier (post-porting), original carrier, ported flag, reachability, MCC/MNC. Pass numbers in E.164 (`+447700900123`) for unambiguous results.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | Phone number — E.164, international, or national format. |
No output schema declared.
No examples provided.
postio_postcode_lookup ~91
Return every PAF delivery point at a UK postcode, ordered by building number. Whitespace and case are normalised. Billable on a hit; valid postcodes with no delivery points return an empty list and are not charged.
| Name | Type | Req | Description |
|---|---|---|---|
| max_results | integer | – | Max results. Default 100. |
| postcode | string | yes | UK postcode, e.g. 'W1G 8YW'. |
No output schema declared.
No examples provided.
postio_udprn_lookup ~78
Look up a single UK delivery point by its UDPRN (Royal Mail's stable per-address ID). Use this after `postio_address_search` to fetch the full record for a chosen suggestion. Billable on a hit; misses (404) are not charged.
| Name | Type | Req | Description |
|---|---|---|---|
| udprn | – | yes | Unique Delivery Point Reference Number. |
No output schema declared.
No examples provided.