Index factor between two dates
time_adjustmentThe index factor that carries a price from a past date to today for a postcode district: the from- and to-period index levels, the multiplier and which index it came from. The same arithmetic the valuation applies to each comparable — use it to bring a sale price of your own up to date. `postcode` is a full UK postcode (only the district is used); `from_date` is YYYY-MM-DD; `lookback_years` 1–20. UK only.
Same call over REST
Market time adjustment/v1/market/time-adjustmentNot connected yet? Connect your assistant. Sign in with your MarketCode account; no API key needed.
Inputs
Before you call it
- postcode
- The postcode must be a full UK postcode ("SE22 8HN"), not a district. Where a tool works at district grain it truncates the postcode itself.
Inputs
Arguments time_adjustment takes
| Name | Type | Required | Description |
|---|---|---|---|
| postcode | string | Yes | |
| from_date | string | Yes | |
| property_type | string | No | |
| lookback_years | integer | No | Default: 5 |
Usage
How to run time_adjustment in your assistant
Ask your assistant in plain English, for example:
"Use the MarketCode tool time_adjustment for <address or area>.
Show the result and the credits charged."The connect steps for Claude, ChatGPT, Codex, Cursor and Claude Code are on the MCP page.
Price and licence
What it costs, and where the data comes from
time_adjustment is free over MCP and over REST, and the two surfaces share one credit balance. Free calls need a signed-in account or an API key and appear in your usage, but they never touch your balance.
Credits are granted on sign-up and bought in packs; the pricing page lists every call.
Related
Tools used with time_adjustment
- Asking-price index (portal listings)Free
asking_price_index_seriesHedonic ASKING-PRICE index for one postcode district, local authority or Great Britain, from portal listings (Rightmove ~95%), 2022M01 = 100, with 80% bands and posterior standard errors, smoothed toward the parent geography.Same category - Asking-rent index (portal listings, ONS-validated)Free
asking_rent_index_seriesHedonic ASKING-RENT index for one postcode district, local authority or Great Britain, from portal lettings, 2022M01 = 100, with bands and SEs. This is the residential rent index; commercial_rent_index_series is the VOA one for commercial property.Same category - Commercial capital indexFree
commercial_index_seriesRepeat-sales CAPITAL index for UK commercial property, quarterly, 1995Q1 = 100.Same category - Commercial capital and rent indices for a placeFree
commercial_marketThe commercial market for a sector and a place: the repeat-sales CAPITAL index, the VOA rating-list RENT index, and the rated stock standing in the authority with its hereditament count, total and median rateable value.Same category - Commercial rent indexFree
commercial_rent_index_seriesCommercial RENT index from the VOA rating lists — FOUR points, one per list (2010 / 2017 / 2023 / 2026), each dated at that list's antecedent valuation date (2008-04-01, 2015-04-01, 2021-04-01, 2024-04-01), with the 2010 list = 100.Same category - Index forecast h1–h7 with bandsFree
market_forecastThe published house-price index forecast for a postcode district or local authority: the last SETTLED index point as the anchor, then up to seven forecast periods with `lo`/`hi` bands, plus the method and publication grain behind them. Seven is the horizon the index publishes — nothing beyond it is offered, and a forecast is a projection of the smoothed repeat-sales index, not a valuation of any property. UK only.Same category
FAQ
Questions about time_adjustment
How much does `time_adjustment` cost?
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time_adjustment is free over MCP and over REST, and the two surfaces share one credit balance. Free calls need a signed-in account or an API key and appear in your usage, but they never touch your balance.
Which assistants can run `time_adjustment`?
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Any MCP client: Claude (claude.ai, Claude Desktop, Claude Code), ChatGPT in developer mode, Codex and Cursor, each documented on the MCP page. You sign in with your MarketCode account over OAuth; there is no key to paste, and the connection is read-only.
Where does the data come from?
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The answer is computed by MarketCode. Coverage is the UK.
Does `time_adjustment` change anything?
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No. The tool is annotated read-only on the server, so it never writes to your data or ours and an assistant can call it without a confirmation step.
Try time_adjustment in your assistant.
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