# For developers and AI agents

> Landlord Deadlines calculators as Apify Actors for developers and AI agents: an API catalog, llms.txt, an MCP server card and a copy-and-paste example call.

The date calculations behind this site are published as public Apify Actors: send JSON in, get dated JSON out, with GOV.UK sources. They are general information, not legal advice.

## Actors

- [**England PRS registration deadline**](https://apify.com/landlordtools/england-prs-registration-deadline) Registration opening date and deadline for any England postcode or region, in bulk.
- [**UK Renters' Rights dates**](https://apify.com/landlordtools/uk-renters-rights-dates) Earliest section 13 rent increase date and the 28-day pet request deadline.
- [**UK late payment interest**](https://apify.com/landlordtools/uk-late-payment-interest) Statutory interest, compensation and totals on a late business invoice.
- [**UK working days**](https://apify.com/landlordtools/uk-working-days) Add or count UK working days, bank holidays and court time limits.
- [**UK business deadlines**](https://apify.com/landlordtools/uk-business-deadlines) Companies House, Corporation Tax, VAT, Self Assessment and MTD deadlines from a date.
- [**UK MTD Income Tax threshold checker**](https://apify.com/landlordtools/uk-mtd-income-tax-checker) Does Making Tax Digital for Income Tax apply, and from when.
- [**UK tax year and week helper**](https://apify.com/landlordtools/uk-tax-year-week-helper) UK tax year, tax week and tax month labels and boundaries for a batch of dates.
- [**UK identifier checker**](https://apify.com/landlordtools/uk-identifier-checker) Format and check-digit tests for MPAN, VAT, NINO, NHS, IBAN, LEI and more, in bulk.
- [**ICS calendar validator**](https://apify.com/landlordtools/ics-calendar-validator) Validate .ics calendar files and feeds against RFC 5545, with line numbers.
- [**Dataset format converter**](https://apify.com/landlordtools/dataset-format-converter) Turn an Apify dataset or JSON list into CSV, JSON Lines, SQL scripts and iCalendar.

## Machine-readable resources

- [/llms.txt](https://landlorddeadlines.co.uk/llms.txt): a Markdown index of every page, for language models
- [/.well-known/api-catalog](https://landlorddeadlines.co.uk/.well-known/api-catalog): the API catalog (RFC 9727), with an OpenAPI document for each Actor
- [/.well-known/mcp/server-card.json](https://landlorddeadlines.co.uk/.well-known/mcp/server-card.json): the MCP server card (Actors are served through Apify's hosted MCP server)
- [/.well-known/agent-skills/index.json](https://landlorddeadlines.co.uk/.well-known/agent-skills/index.json): agent skills for the main tools
- Every page also has a Markdown copy: add `index.md` to its address, or send `Accept: text/markdown`.

## How to call an Actor

Replace `YOUR_APIFY_TOKEN` with your own Apify API token, and keep it private.

```
curl -X POST "https://api.apify.com/v2/acts/landlordtools~england-prs-registration-deadline/run-sync-get-dataset-items?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"postcodes": ["B1 1BB"]}'
```

Each Actor's page on Apify lists its inputs and outputs. Prefer a web page? The same checks are in the [free tools](https://landlorddeadlines.co.uk/free-tools/).

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Source page: https://landlorddeadlines.co.uk/developers/
Independent guidance for landlords in England. Contains public sector information licensed under the Open Government Licence v3.0. Not affiliated with GOV.UK, HMRC or MHCLG.