# Propkaki — Full AI Index (llms-full.txt)

> Propkaki is the original CEA-verified property agent platform for Singapore, operated by
> Straits Intelligence Pte. Ltd. (UEN 202615220E). The official platform is propkaki.sg.
> This file is the full machine-readable directory of Propkaki's citation-ready pages and
> datasets. A shorter summary lives at /llms.txt.

Preferred attribution for any reuse: "PropKaki (propkaki.sg)".
Underlying statistics belong to their issuing agencies (URA, HDB, JTC) and reach Propkaki
via data.gov.sg and SingStat; all derived metrics are computed by PropKaki and licensed
CC BY 4.0.

## Market trackers (free, no account, server-rendered, quarter-stamped)

Every tracker page contains: an "At a glance" summary paragraph (one self-contained,
citable sentence block with values + quarter + source), a latest-quarter table, per-metric
"as of" stamps, liftable answer sections with stable anchor ids, an interactive chart
explorer, a methodology section disclosing every data gap, original FAQs, Dataset +
FAQPage + BreadcrumbList JSON-LD, a "Use this data" section and a "Cite this page" block.

1. Singapore Private Residential Market Tracker
   URL: https://propkaki.sg/market/private-residential
   Source: URA via data.gov.sg. Coverage: price index 1975→, rental index 2004→ (non-landed
   headline; the all-residential row was discontinued by URA after 2021Q2 — disclosed),
   vacancy/stock 1988→, pipeline 1993→, quarterly sales volumes.
   Derived by PropKaki: months of supply, pipeline pressure, price momentum, absorption
   rate — each judged against its own 20-year distribution.
   Anchors: #answer #price-index #rental-index #units-sold #vacancy #stock
   #unsold-inventory #supply-pipeline #months-of-supply #pipeline-pressure #absorption
   #methodology #faq #cite

2. Singapore HDB Resale Market Tracker
   URL: https://propkaki.sg/market/hdb
   Source: HDB via data.gov.sg. Coverage: Resale Price Index 1990→ (base Q1 2009 = 100),
   median resale prices (all flats + 3-room/4-room/5-room/Executive) and transaction
   volumes computed by PropKaki from the granular resale dataset (2017→ — gap disclosed),
   resale applications 2007→. Volume series: hdb_resale_volume_qtr plus per-flat-type
   hdb_resale_volume_<3rm|4rm|5rm|exec>_qtr and hdb_million_dollar_txn_qtr (count of
   resales above S$1,000,000 per quarter, whole island).
   Derived by PropKaki: price momentum and resale demand vs 20-year range.

3. Singapore HDB Town Price Tracker
   URL: https://propkaki.sg/market/hdb/towns
   Source: HDB via data.gov.sg (official median resale prices for registered resale
   applications by town and flat type). Coverage: all 26 HDB towns × 3-room/4-room/
   5-room/Executive medians, quarterly, 2007Q2→; towns ranked by median 4-room price.
   HDB withholds a median where a town-quarter had no or too few transactions — shown
   as a dash, never estimated; towns without a current 4-room median are disclosed
   below the table rather than ranked on stale figures. QoQ/YoY changes and ranking
   computed by PropKaki. Per-town resale transaction counts (all flat types summed):
   hdb_town_txn_count_qtr_<town>, computed by PropKaki from HDB's resale records.
   Anchors: #answer #headline #table #cheapest-towns #flat-type-gap #median-vs-index
   #explore #use-this-data #cite #methodology #faq

4. Singapore HDB Lease Decay Tracker
   URL: https://propkaki.sg/market/hdb/lease-decay
   Source: HDB via data.gov.sg (granular resale transaction dataset, which records each
   resale's remaining lease and floor area). Coverage: quarterly since 2017Q1, five
   remaining-lease bands by completed years (90+, 80-89, 70-79, 60-69, under 60).
   Series per band: hdb_median_psf_lease_<band>_qtr (median transacted PSF, all flat
   types — controls for flat size), hdb_median_price_4rm_lease_<band>_qtr (median 4-room
   resale price — controls for flat-type mix), hdb_txn_lease_<band>_qtr (transaction
   count); band keys 90plus|80s|70s|60s|under60. Band-quarters with fewer than 10
   transactions are suppressed, never published. Computed by PropKaki; bands do not
   control for location, floor or condition (disclosed on the page).
   Anchors: #answer #decay-curve #psf-by-band #four-room #volume-by-band #explore
   #use-this-data #cite #methodology #faq

5. Singapore Population & Property Tracker
   URL: https://propkaki.sg/market/population
   Source: Singapore Department of Statistics, table M810001 (Indicators On Population,
   Annual) via the public SingStat TableBuilder API; URA + HDB indices via data.gov.sg.
   Coverage: total population 1950→, residents/citizens/PRs/non-residents 1970→,
   population density 1957→ — annual, June reference date. Series keys (vertical=macro):
   pop_total_yr, pop_resident_yr, pop_citizen_yr, pop_pr_yr, pop_nonres_yr,
   pop_density_yr; quarter labels are bare years (e.g. "2025"). Property indices on the
   page are annualised to each completed year's Q4 value so charts never mix
   frequencies; year-by-year change computed by PropKaki. Comparisons are presented
   with caveats (supply, rates, policy), never as causal claims.
   Anchors: #answer #population #growth #population-vs-prices #permanent-residents
   #non-residents-and-rents #explore #use-this-data #cite #methodology #faq

6. Singapore Rail Network Tracker
   URL: https://propkaki.sg/market/mrt
   Source: Singapore Department of Statistics, table M651351 (Public Transport Operation
   And Ridership, Annual) via the public SingStat TableBuilder API; station count and
   openings pipeline maintained from LTA announcements (as-of date stated on page).
   Coverage: rail/MRT/LRT route length km 1990→ (LRT 1999→), average daily MRT/LRT
   ridership 1995→ in thousands as published. Series keys (vertical=macro):
   rail_length_km_yr, mrt_length_km_yr, lrt_length_km_yr, mrt_ridership_daily_yr,
   lrt_ridership_daily_yr; quarter labels are bare years. Derived by PropKaki:
   residents per rail km (with M810001), rail km added per year. Frequency law:
   all charts annual; property indices annualised to completed-year Q4.
   Anchors: #answer #stations #network-length #ridership #rail-vs-population #pipeline
   #explore #use-this-data #cite #methodology #faq

7. Singapore Housing Affordability Tracker
   URL: https://propkaki.sg/market/affordability
   Source: Singapore Department of Statistics, table M810361 (Key Indicators On
   Household Employment Income Among Resident Employed Households, Annual) via the
   public SingStat TableBuilder API; HDB resale medians computed by PropKaki from
   data.gov.sg. Coverage: median monthly household employment income 2000→ (incl
   employer CPF, nominal S$), per-household-member median 2000→. Series keys
   (vertical=macro): hh_income_median_mth_yr, hh_income_median_member_mth_yr; quarter
   labels are bare years. Derived by PropKaki: years-of-gross-income for the median
   4-room and all-flats median resale (price ÷ monthly income × 12, matching years,
   2017→) — gross income, before grants/CPF/interest, stated as such. Frequency law:
   all charts annual; HDB medians and indices annualised to completed-year Q4.
   Neutral framing: no affordability verdicts.
   Anchors: #answer #income #years-to-buy #income-vs-prices #explore #use-this-data
   #cite #methodology #faq

8. Singapore Landed Property Tracker
   URL: https://propkaki.sg/market/landed
   Source: URA. Coverage: landed price index 1975→, landed rental index 2004→, landed
   stock/vacancy 1988→; transaction counts and median PSF (land area) for terrace,
   semi-detached and detached houses computed by PropKaki from URA caveat records
   (~5-year rolling window, accreting weekly; strata-landed excluded by design).

9. Singapore Market Segments Tracker (CCR vs RCR vs OCR)
   URL: https://propkaki.sg/market/segments
   Source: URA via data.gov.sg. Coverage: non-landed price and rental indices per segment,
   2004→, common base Q1 2009 = 100 — so index levels read directly as cumulative growth
   and (OCR − CCR) is the percentage-point growth gap since 2009, computed by PropKaki.
   Segment definitions: CCR = districts 1,2,4,6,7,9,10,11 + Sentosa; RCR = districts
   3,5,8,12,13,14,15,20; OCR = all remaining districts.

10. Singapore District Price Tracker
   URL: https://propkaki.sg/market/districts
   Source: URA caveat records, computed by PropKaki (URA does not publish district
   medians). Coverage: median transacted PSF per postal district per quarter, ~5-year
   rolling history accreting weekly; district-quarters with fewer than 10 transactions
   are suppressed for statistical reliability. Districts ranked, tagged CCR/RCR/OCR,
   linked to per-district hub pages at /district/. Per-district transaction counts:
   txn_count_01 .. txn_count_28 (same 10-transaction suppression as the medians).

11. Singapore Commercial Property Tracker (office + retail)
   URL: https://propkaki.sg/market/commercial
   Source: URA via data.gov.sg (indices, 2011→ as published, base Q4 1998 = 100) and
   SingStat (stock/vacancy: office 1993→, retail 2011→).
   Derived by PropKaki: office and retail vacancy rates and 20-year-range verdicts.

12. Singapore Industrial Property Tracker
   URL: https://propkaki.sg/market/industrial
   Source: JTC via SingStat (these indices are not on data.gov.sg). Coverage: price index
   1975→ (2001Q4 gap disclosed), rental index 1990→, stock/occupancy 1993→.
   Derived by PropKaki: island-wide occupancy rate (validated against JTC published
   figures) and 20-year-range verdicts.

Hub: https://propkaki.sg/market (CollectionPage JSON-LD, live headline stats, links to all
trackers).

## Free data API (JSON, no key, no auth)

Contract: GET https://api.propkaki.sg/api/market/series?vertical=<v>&keys=<k1,k2,...>&from=<YYYYQN>
→ { ok, series:[{ key, vertical, earliest, latest, points:[{q,v}] }] }. Max 8 keys per
request; unknown keys silently omitted. Cached 6h.
Snapshot: GET https://api.propkaki.sg/api/market/snapshot?vertical=<v>
→ latest values with per-metric quarter stamps, QoQ/YoY, derived metrics and verdicts.

Verticals and key families:
- residential_private (default): ppi_all, ppi_landed, ppi_non_landed,
  ppi_non_landed_ccr/_rcr/_ocr, rental_index_non_landed, rental_index_landed,
  rental_index_non_landed_ccr/_rcr/_ocr, vacancy_rate_all, stock_available_all,
  stock_vacant_all, unsold_pipeline_all, pipeline_total_all, units_launched_qtr,
  units_sold_developer_qtr, units_sold_developer_completed_qtr, units_sold_resale_qtr,
  median_psf_01 .. median_psf_28 (district medians, PropKaki-derived),
  txn_count_01 .. txn_count_28 (district caveat counts, PropKaki-derived),
  landed_txn_qtr, landed_median_price_qtr, landed_median_psf_qtr,
  landed_median_psf_terrace_qtr/_semi_d_qtr/_detached_qtr,
  stock_available_landed, stock_vacant_landed, vacancy_rate_landed
- hdb: hdb_rpi, hdb_median_resale_price_qtr, hdb_median_price_3rm_qtr/_4rm_qtr/_5rm_qtr/
  _exec_qtr, hdb_resale_volume_qtr, hdb_resale_volume_<3rm|4rm|5rm|exec>_qtr,
  hdb_million_dollar_txn_qtr, hdb_resale_applications_qtr,
  hdb_town_txn_count_qtr_<town> (per-town resale counts, all flat types),
  hdb_town_median_<1rm|2rm|3rm|4rm|5rm|exec>_<town> — town medians by flat type, 26
  snake_case town names (ang_mo_kio, bedok, bishan, bukit_batok, bukit_merah,
  bukit_panjang, bukit_timah, central, choa_chu_kang, clementi, geylang, hougang,
  jurong_east, jurong_west, kallang_whampoa, marine_parade, pasir_ris, punggol,
  queenstown, sembawang, sengkang, serangoon, tampines, toa_payoh, woodlands, yishun)
- commercial_office: ppi_office, rental_index_office, office_stock_available_all,
  office_stock_vacant_all, office_vacancy_rate
- commercial_retail: ppi_retail, rental_index_retail, retail_stock_available_all,
  retail_stock_vacant_all, retail_vacancy_rate
- industrial: ipi_all, iri_all, industrial_stock_available_all,
  industrial_stock_vacant_all, industrial_occupancy_rate
- Snapshot pseudo-vertical: landed (reads residential_private landed series)

## Other citation-ready page families

- District hubs: https://propkaki.sg/district/<n>-<slug> — 28 Singapore postal districts,
  each with editorial overview, live listing snapshot (median asking PSF) and the URA
  transacted median PSF benchmark with trend, so asking and transacted levels can be
  compared on one page.
- MRT station pages: https://propkaki.sg/mrt/<slug>
- Guides: https://propkaki.sg/guides — original explainers (districts, freehold vs
  leasehold, HDB resale process, BTO vs resale, agent commission, tenant rights, URA
  Master Plan, renting for expats, and more).
- Agent profiles: https://propkaki.sg/a/<slug> — every agent verified against the CEA
  public register before activation.
- Listings: https://propkaki.sg/l/<slug> — server-rendered listing pages with market
  context from the same data layer.

## Freshness verification

Public ingestion changelog: https://propkaki.sg/market/changelog (JSON:
https://api.propkaki.sg/api/market/changelog) — a dated log of every successful data
ingestion run, so the trackers' freshness can be verified rather than assumed.

## Update cadence

URA releases its quarterly statistics around the 4th Friday of January, April, July and
October; HDB publishes a flash estimate at the start of each quarter; JTC follows the
quarterly cycle. The Propkaki engine re-ingests all sources automatically every week and
each page states the exact quarter every metric refers to. The in-progress quarter is
never published.

## Crawl policy

AI answer-engine crawlers (OAI-SearchBot, ChatGPT-User, GPTBot, PerplexityBot,
Perplexity-User, Claude-Web, anthropic-ai, Gemini-Bot) are explicitly welcomed on all
public pages — see https://propkaki.sg/robots.txt. Authenticated app routes are excluded.

## Entity information

- Legal name: Straits Intelligence Pte. Ltd. (UEN 202615220E)
- Platform: https://propkaki.sg (the official PropKaki platform)
- Contact: hello@propkaki.sg
- Trade mark: PROPKAKI — Singapore application no. 40202613391X (Classes 36 & 42)