# SiteCheck EORI Validator

> SiteCheck EORI Validator is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-16).

Validates one or more UK EORI (Economic Operator Registration and Identification) numbers against HMRC's official API

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/eori?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-eori-validator-3696f093
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xhlsbR5R65ISBjcn-P-zE

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-eori-validator-3696f093
```

Example prompt: Can you check whether EORI number GB123456789000 is valid and registered with HMRC?

## When to prefer this

Use this endpoint when you need to verify UK-specific EORI numbers against HMRC's authoritative open government data source. Ideal for trade compliance workflows, customs documentation, and KYB (Know Your Business) onboarding flows involving UK importers or exporters. Supports batch validation of up to 10 numbers per call, making it efficient for supplier verification pipelines.

## Known failure modes

- Invalid EORI format returns valid=false rather than an error
- HMRC API outage returns a 503 status
- Trader name and address are always null — HMRC does not expose them
- More than 10 comma-separated EORIs may not be supported
- Non-UK EORI numbers (e.g. EU-format) may not be checkable via HMRC endpoint

## How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Also: SEO metadata, link checking, redirect chains, security headers, mail DNS (SPF, DMARC, DKIM), QR codes, language detection, photo EXIF, identifier validation, image OCR, SEC filings, SEC financials, Congress bills, macro rates, UK company data, GitHub repo stats, Hacker News, Wikipedia, gas prices, Solana swap quotes, ERC-20 token checks, ENS names, EVM wallet balances, EVM balances, transactions and contract calls, Solana transactions and accounts, crypto prices, candles and order books, DeFi TVL, yields and stablecoins, SEC insider trades, weather, geocoding and holidays, IP owners and postcodes, npm, PyPI and crates package data and vulnerabilities, GitHub profiles, arXiv papers and DOIs, structured extraction, summaries, sentiment and reranking, HTML tables and RSS feeds, Bitcoin fees, addresses and transactions, Bitcoin address balances, Bitcoin transaction status, EVM calldata decoding, verified EVM contracts, Hyperliquid perpetual markets, Hyperliquid account positions, Polymarket odds, crypto fear and greed, DeFi fees, DEX volume, company registries of four countries, ISIN, CUSIP and ticker lookup, SEC full-text search, SEC 8-K events, FDA drug labels, FDA adverse event counts, clinical trials, PubMed articles, US federal grants, EU public tenders, NPI provider lookup, US address geocoding, USGS earthquakes, NWS weather alerts, sunrise and moon times, time zone conversion, distance and bearing, GDACS disaster alerts, llms.txt checks, AI crawler access, tracker and cookie audits, certificate transparency, site logos and icons, GitHub releases, GitHub issues, Stack Overflow answers, read-only Wikidata queries, text moderation, image descriptions, text classification, named entity extraction, PII redaction, phone number checks, cron explanations, JSON Schema validation, whale transfers, SSL certificate expiry, Markdown to HTML, PageSpeed scores, Product Hunt launches, sanctions screening (OFAC, EU, UN, UK), flight fare search, YouTube transcripts, speech to text from media links, perpetual funding rates, crypto technical indicators, crypto news headlines, crypto spot conversion, World Bank macro indicators, loan and investment calculator, grammar checks, readability scores, keyword extraction, text diffs, transliteration and slugs, text chunking, subtitle translation, tone rewrites, working days, date calculations, unit conversion, book lookup, food nutrition, airport lookup, tide predictions, nearby places, robots.txt checks, hashes, encode and decode, JWT inspection, UUIDs and passwords, User-Agent parsing, subdomain discovery, uptime checks, VIN decoding, UK EORI checks, SWIFT and BIC checks, stock ticker lookup, invoice extraction, resume parsing, address parsing, prediction-market data, multi-chain RPC and chain data, compliance and government data, web data, search and research, AI text jobs. Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

## Output

Returns a JSON object with validity status (true/false), country code, processing date from HMRC, and null trader name/address (HMRC does not publish trader details). Covers up to 10 EORI numbers per call. A 503 indicates HMRC outage; an invalid format returns valid=false.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "eori"
     ],
     "properties": {
      "eori": {
       "type": "string",
       "description": "One UK EORI number, or up to 10 separated by commas, e.g. GB123456789000"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "The trader's name and address are not published by HMRC's check; they are null. An outage is a 503, never 'invalid'.",
  "count": 1,
  "source": "HMRC Check an EORI number API (open government data)",
  "results": [
   {
    "eori": "GB123456789000",
    "valid": false,
    "trader": null,
    "country": "GB",
    "processingDate": "2026-10-15T15:16:00+01:00"
   }
  ],
  "checkedAt": "2026-10-15T14:16:00.058Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-eori-validator-3696f093/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)