# SiteCheck UK Company Lookup > SiteCheck UK Company Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-20). Retrieves UK company information from Companies House by company number or name, including officers, persons with significant control, filings, and accounts data. ## Facts - Endpoint: GET https://api.sitecheck-api.workers.dev/api/uk-company?utm_source=zero.xyz - Price: $0.003/call - Payment: x402 - Status: unknown - Last checked: 2026-10-20 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/sitecheck-uk-company-lookup-5978956c - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x9LWcaeFOfBBpNlTGLZYR 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-uk-company-lookup-5978956c ``` Example prompt: Can you pull up the Companies House record for EXAMPLE HOLDINGS LIMITED — I need to see their directors, persons with significant control, registered office, and whether their accounts are overdue? ## When to prefer this Use this endpoint when you need structured, up-to-date UK company registry data including officers, PSCs, filings, and compliance status. Prefer this over general web search when you need machine-readable, authoritative data sourced directly from Companies House. Ideal for due diligence, KYC, supplier verification, or compliance workflows involving UK-registered entities. ## Known failure modes - Company number not found — returns empty or error response - Multiple candidates returned when searching by name (up to 5 matches) - Company name search returns no match if name is misspelled or abbreviated differently - Rate limiting or payment failure via x402 protocol - Companies House API downstream outage causing delayed or failed response ## 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 containing the company's name, type, Companies House number, status, SIC codes, jurisdiction, incorporation date, registered office address, insolvency history flag, a list of officers (with roles and appointment dates), persons with significant control (with natures of control and nationalities), recent filing history (with dates, types and links), accounts due/overdue status, and confirmation statement due/overdue status. Includes source attribution and a timestamp of when the data was checked. ## 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", "properties": { "q": { "type": "string", "description": "Alternative to number: a company name (best match, up to 5 candidates)" }, "number": { "type": "string", "description": "Companies House number, e.g. 00445790 or SC123456" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object" } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "source": "Companies House REST API (https://developer.company-information.service.gov.uk), Crown copyright under the Open Government Licence", "company": { "name": "EXAMPLE HOLDINGS LIMITED", "type": "ltd", "number": "00445790", "status": "active", "sicCodes": [ "70100" ], "jurisdiction": "england-wales", "statusDetail": null, "incorporatedOn": "1946-05-02", "registeredOffice": { "lines": [ "1 Example Street" ], "region": null, "country": "England", "locality": "London", "postcode": "EC1A 1AA" }, "hasInsolvencyHistory": false }, "filings": [ { "date": "2025-10-20", "link": "https://find-and-update.company-information.service.gov.uk/company/00445790/filing-history/MzIx", "type": "CS01", "description": "Confirmation statement made on 2025-10-16 with no updates" } ], "license": "Companies House data, Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)", "persons": [ { "kind": "individual-person-with-significant-control", "name": "Jane Smith", "natures": [ "ownership-of-shares-75-to-100-percent" ], "notifiedOn": "2019-04-06", "nationality": "British", "countryOfResidence": "England" } ], "accounts": { "nextDue": "2026-12-31", "overdue": false, "lastMadeUpTo": "2025-03-31" }, "officers": [ { "name": "SMITH, Jane", "role": "director", "appointedOn": "2019-04-01", "nationality": "British", "countryOfResidence": "England" } ], "checkedAt": "2026-10-13T18:40:00.000Z", "matchedBy": "number", "confirmationStatement": { "nextDue": "2026-10-30", "overdue": false, "lastMadeUpTo": "2025-10-16" } } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-uk-company-lookup-5978956c/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)