{"uid":"cap_wSk071fQiLs2lR6_w1zIk","slug":"eckari-uk-company-registered-office-address-lookup-0b1ea82b","name":"Eckari UK Company Registered Office Address Lookup","description":"Return the current registered office address of a UK company from the Companies House register as structured fields (premises, address lines, locality, region, postcode, country) plus a single-line rendering for correspondence, address matching and verification. This is the statutory registered address, not a trading or branch address. Use when: What is the registered office address of company 00445790?","url":"https://api.eckari.com/v1/companies/uk/:companyNumber/registered-office","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","required":["company_number"],"properties":{"company_number":{"type":"string","pattern":"^\\s*(?:[0-9]{1,8}|[A-Za-z][0-9]{7}|[A-Za-z]{2}[0-9]{6}|[A-Za-z]{2}[0-9]{5}[A-Za-z]|[A-Za-z]{2}[0-9]{4}[A-Za-z]{2})\\s*$","maxLength":10,"minLength":1,"description":"Companies House company number, also called the company registration number (CRN). Accepted shapes are the register's own — 1-8 digits (zero-padded to 8, e.g. 445790 → 00445790), one letter + 7 digits (R0000001), two letters + 6 digits (SC002180, NI000001, OC123456, OE000001), or the registered-society suffix forms (two letters + 5 digits + 1 letter; two letters + 4 digits + 2 letters). Case-insensitive; surrounding whitespace is ignored (which is why maxLength is 10); internal spaces and punctuation are not accepted. Any other value (for example PROBE) is rejected as INVALID_INPUT before payment and before any upstream call."}},"additionalProperties":false},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tNh8vBv61jqke7HCrqxHX","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current statutory registered office address of a UK company from Companies House as structured fields and a single-line rendering.","exampleAgentPrompt":"What is the registered office address for UK company number 00445790? I need the full structured address including postcode and country.","exampleUseCases":[{"title":"KYB address verification for onboarding","prompt":"We're onboarding a new UK supplier and need to verify their registered office address — their company number is 04808863. Can you pull the statutory address from Companies House so we can cross-check what they gave us?"},{"title":"Correspondent address for legal notice","prompt":"I need to send a formal legal notice to the registered office of UK company 02065547. What's the full registered address I should use?"},{"title":"Enriching a CRM with company addresses","prompt":"I have a UK company number, 07041012 — can you fetch their registered office address including premises, street, locality, and postcode so I can add it to our records?"}],"resultDescription":"A structured object containing the registered office address broken into individual fields (premises, address line 1, address line 2, locality, region, postcode, country) as recorded at Companies House, plus a single-line formatted string suitable for correspondence, matching, and verification purposes. This is the statutory registered address, not a trading or branch address.","failureModes":["Invalid or malformed company number (non-alphanumeric, too long, internal spaces) returns INVALID_INPUT error before any charge","Company number not found in Companies House register returns a not-found error","Company exists but has no registered office on record may return null or empty address fields","Whitespace-only company number is rejected as INVALID_INPUT","Upstream Companies House API unavailability may cause timeout or 5xx error"],"whenToPreferThis":"Use this endpoint when you need the current, authoritative statutory registered office address of a UK company from Companies House — specifically when you need structured address fields (premises, postcode, country etc.) rather than just a free-text address. Prefer this over web scraping or unverified sources when accuracy and official data are required for KYB, legal correspondence, CRM enrichment, or address verification workflows. Not suitable for retrieving trading addresses, branch addresses, or addresses for non-UK entities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:47:27.874Z","isFirstParty":false}