# Katalis APIs

UK public-record intelligence and monitoring on one key: what the official record says about a company, explained, and when it changes. Free 100 credits a month; every API open to read without an account.

- Store: https://meetkatalis.com/apis
- OpenAPI: https://meetkatalis.com/openapi.yaml
- Postman collection: https://meetkatalis.com/postman/katalis.postman_collection.json (public workspace: https://www.postman.com/meetkatalis-6584087/katalis-uk-business-apis/overview)
- MCP server (for AI agents): https://meetkatalis.com/mcp — with no key, the open tools answer about one company at a time (payment practices, contracts won, the public record, registers, accounts, deadlines); with a key as a Bearer token, every API
- Keys: https://meetkatalis.com/developers

## The APIs

- [UK Company Enrichment](https://meetkatalis.com/apis/company-enrichment.md) — A UK company name or domain → a verified profile in one call. (2 credits)
- [UK Business Score](https://meetkatalis.com/apis/business-score.md) — A UK company or domain → an outside-in score, graded and explained. (10 credits (20 on the free plan))
- [UK Company Search](https://meetkatalis.com/apis/company-search.md) — A name or number → the right registered company, ranked by confidence. (1 credit)
- [Industry & SIC Classifier](https://meetkatalis.com/apis/industry-classifier.md) — A domain or name → its industry, SIC codes and what it does. (2 credits)
- [Company Logo](https://meetkatalis.com/apis/company-logo.md) — A company's logo by domain. Free, no key. (free)
- [Modern Slavery Statement Intelligence](https://meetkatalis.com/apis/modern-slavery.md) — A company's Modern Slavery statement → structured, quality-scored JSON. (4 credits (8 on the free plan))
- [Website Accessibility Audit](https://meetkatalis.com/apis/accessibility-audit.md) — A URL → grounded WCAG-flavoured findings, honestly scoped. (2 credits (4 on the free plan))
- [Ofsted Report-Card Intelligence](https://meetkatalis.com/apis/ofsted-report-card.md) — An Ofsted report → structured grades, summary and next steps. (4 credits (8 on the free plan))
- [Fit & Approach Assessment](https://meetkatalis.com/apis/assess.md) — A target + what YOU sell → fit score, real signals, and the angle. (25 credits)
- [CQC Report-Card Intelligence](https://meetkatalis.com/apis/cqc-report.md) — A CQC inspection report → structured ratings, summary and concerns. (4 credits (8 on the free plan))
- [Charity Report Intelligence](https://meetkatalis.com/apis/charity-report.md) — A trustees' annual report → a structured due-diligence read. (4 credits (8 on the free plan))
- [Director ID Verification Check](https://meetkatalis.com/apis/idv-check.md) — Every director and PSC of a UK company: is a verified identity showing, and by when must it be? (1 credit)
- [Public Contracts Won](https://meetkatalis.com/apis/contracts-won.md) — What public-sector work has this company won? Every published award, totalled and read. (1 credit)
- [Gender Pay Gap Report Card](https://meetkatalis.com/apis/gender-pay-gap.md) — An employer's gender pay gap, read: the gaps, the pay quarters, the trend, against its sector. (1 credit)
- [Licences & Registers Check](https://meetkatalis.com/apis/registers.md) — Is this business registered for what it does? Waste carrier status, permits, enforcement, sanctions. (2 credits)
- [Generative Art](https://meetkatalis.com/apis/art.md) — 22 art styles drawn in your colours: a crisp SVG cover for every post, product or page. (1 credit)
- [Brand Kit](https://meetkatalis.com/apis/brand-kit.md) — One website in, its brand out: colours, fonts, logo, voice, call to action, photos. (2 credits)
- [Effect Embeds](https://meetkatalis.com/apis/effects.md) — Moving backgrounds for any website, in your colours, from one line of script. (3 credits)
- [Change Feed](https://meetkatalis.com/apis/change-feed.md) — Tell me when this company changes. Watch lists, a change feed and signed webhooks. (2 credits per company per month)
- [HMRC AML Register Check](https://meetkatalis.com/apis/aml-register.md) — Is this business supervised by HMRC under the Money Laundering Regulations, for what, and has that changed. (1 credit)
- [SRA Law Firm Check](https://meetkatalis.com/apis/sra-check.md) — Is this an SRA-authorised law firm, what kind, since when, and has that changed. (1 credit)
- [CQC Care Provider Check](https://meetkatalis.com/apis/cqc-check.md) — Is this company a CQC-registered care provider, how are its services rated, and has that changed. (1 credit)
- [Charity Register Check](https://meetkatalis.com/apis/charity-check.md) — Is this a registered charity, is it in good standing, and what do its accounts say. (1 credit)
- [Ownership Chain](https://meetkatalis.com/apis/ownership.md) — Who controls the company, followed up the register to the parent nobody registered controls. (2 credits)
- [Carbon Reduction Plan Check](https://meetkatalis.com/apis/crp-check.md) — A supplier's published Carbon Reduction Plan read against the PPN 006 template, part by part. (4 credits (8 on the free plan))
- [Filed Accounts](https://meetkatalis.com/apis/accounts.md) — A company's latest filed accounts read into plain figures, this year and last, from Companies House's own tagged document. (2 credits)
- [PPN 018 Payment Check](https://meetkatalis.com/apis/ppn-018.md) — A company's statutory payment report read against the PPN 018 tests and the Fair Payment Code tiers. (1 credit)
- [Secured Borrowing](https://meetkatalis.com/apis/charges.md) — A company's registered charges in plain English: how many outstanding, which lenders, what's secured, how recent. (1 credit)
- [Will They Pay Me On Time?](https://meetkatalis.com/apis/will-they-pay.md) — A large customer's payment habits read from the supplier's side, with what its lateness is worth on your invoice. (1 credit)
- [Late Payment Calculator](https://meetkatalis.com/apis/late-payment.md) — What a late-paid business invoice is owed: statutory interest at the right rate for each half-year, plus the fixed compensation. (1 credit)
- [Sponsor Licence Check](https://meetkatalis.com/apis/sponsor-licence.md) — Is this UK employer licensed to sponsor visas, at what rating, and what changed on the register. (1 credit)
- [Website Legal Check](https://meetkatalis.com/apis/website-legal.md) — The legal basics a UK business website must have, checked the way a visitor sees them, and who's behind the site. (4 credits (8 on the free plan))
- [Company Deadlines](https://meetkatalis.com/apis/deadlines.md) — Every date a UK company has, in one call, and a calendar feed you subscribe to. (1 credit)
- [UK Company Public Record](https://meetkatalis.com/apis/public-record.md) — Everything the public record says about a UK company, joined and read, in one call. (3 credits)
- [Tender Match](https://meetkatalis.com/apis/tender-match.md) — A UK business → the live public-sector contracts that fit what it does. (3 credits)
- [AI Visibility Check](https://meetkatalis.com/apis/ai-visibility.md) — Do AI assistants know this business exists? Asked cold, graded against the facts. (5 credits)
- [Company Distress Signals](https://meetkatalis.com/apis/distress-signals.md) — Is this customer or supplier in trouble? What the Companies House register shows, in one call. (1 credit)
- [Supplier Payment Practices](https://meetkatalis.com/apis/payment-practices.md) — How fast does this company pay its suppliers? From its own statutory reports, benchmarked. (1 credit)

## Conventions

- Auth: `x-api-key: kat_live_…` on every request (free key at https://meetkatalis.com/developers: a verified email and mobile, 100 credits a month, no card).
- One credit balance across every API; each endpoint's price is on its page and in `x-credits` in https://meetkatalis.com/openapi.yaml.
- Keys are camelCase everywhere. A registered company is `company: { name, number, status, statusDetail?, filingsOverdue? }` on the register endpoints; the enrichment family (enrich, score, assess, brand-kit, ai-visibility, tender-match) keeps `business` / `profile` with `companyNumber`.
- Every error has `code` and `requestId`; every reply an `x-request-id` header; a charged reply `x-credits-remaining`; a reply that gave credits back `x-credits-refunded`. Missing = 404 with `query`.
- Burst ceiling 60 requests a minute per key (429, `Retry-After`, no credits used). A failure on our side (5xx) gives the call's credits back.
- Company data contains public sector information licensed under the Open Government Licence v3.0.