Prozorro.Sale Server

Read-only MCP server for Prozorro.Sale, the Ukrainian state platform that auctions public assets — small and large privatisation, land sale and rental, property lease, timber, subsoil, arrested and bankruptcy assets, sanctioned assets and non-performing loans.

The tools are organised around what people actually ask, not around HTTP endpoints. There is no GET /procedures/{id}/documents/{doc_id}/history tool; there is "show me the documents for this auction". Nothing writes: no bids are placed, no procedures are created or modified.

Tools

Tool	Question it answers
search_auctions	"What land is up for rent near Lviv under 50 000 ₴?"
get_auction	"Tell me everything about SPD001-UA-20260806-70620."
get_auction_timeline	"How long do I have left to bid, and what happens next?"
get_auction_results	"What did it finally sell for, and how many bidders were there?"
get_auction_documents	"Give me the technical specification and the signed contract."
find_comparable_auctions	"Is this starting price reasonable for this kind of asset?"
track_auction_changes	"What new lots appeared in my niche since yesterday?"
analyze_auction_market	"How much timber was auctioned last week, and how much of it sold?"
list_procedure_types	"Which asset programmes and auction formats exist?"
get_publication_constraints	"If I list a lot today, how soon can the auction run?"

Every tool accepts the public auction id printed on the website (LRE001-UA-20260708-03894) as well as the internal 24-character procedure id.

Tool reference

search_auctions

Entry point for any "what is available" question.

Parameter	Type	Notes
procedure_type	string[]	Asset programme or exact selling method. "landRental" expands to every format it supports; "landRental-english" is used as-is. Name it whenever you can — the server then queries the per-type feeds and covers far more relevant auctions.
open_for_bids	boolean	"What can I bid on" — keeps only auctions whose deadline has not passed.
keyword	string	Ukrainian free text over title, description, items, classification and locality. All words must match.
status	string[]	e.g. ["active_tendering"], ["complete"]. See list_procedure_types.
region	string	Substring of oblast or settlement, e.g. "Львів".
classification	string	CAV/CPV code or prefix, e.g. "07" or "07123000-7".
min_value / max_value	number	Starting-price band.
seller / seller_edrpou	string	The body running the auction — on state-property leases usually a regional SPFU office, not the institution.
property_owner / property_owner_edrpou	string	The organisation the asset belongs to (балансоутримувач). See Owner vs seller.
published_from / published_to	string	ISO date bounds on publication.
changed_since / changed_until	string	Scan a specific historical period instead of recent activity.
limit	number	Results returned, 1–100. Default 20.
scan_pages	number	Feed pages to scan, 1–40. Default 8. Raise when results come back thin or truncated.

// Property lease near Lviv, still open, under 50 000 UAH
{"procedure_type": ["legitimatePropertyLease"], "open_for_bids": true,
 "region": "Львів", "max_value": 50000, "limit": 10}

// Everything privatisation-related that concluded in July 2026
{"procedure_type": ["smallPrivatization", "largePrivatization"], "status": ["complete"],
 "changed_since": "2026-07-01", "changed_until": "2026-07-31", "scan_pages": 25}

Returns compact summaries plus a scanned block. An empty result means "not in the scanned window", never "does not exist".

Owner vs seller

On the legitimatePropertyLease family the two roles are different organisations. A room in a university building is auctioned by the regional SPFU office, so the university appears as propertyOwner (балансоутримувач) and never as seller. Filtering by seller for an institution returns nothing at all.

// Everything Lviv Polytechnic put up for lease this year — EDRPOU is exact, prefer it to a name
{"procedure_type": ["legitimatePropertyLease"], "property_owner_edrpou": "02071010",
 "changed_since": "2026-01-01", "changed_until": "2026-08-06", "scan_pages": 40}

Only that family publishes the distinction; for every other programme relatedOrganizations is absent, the seller owns what it sells, and property_owner matches nothing. There is no silent fallback to text search — combine with keyword if you need one.

get_auction

Everything about one auction. For deadlines alone use get_auction_timeline; for the outcome alone use get_auction_results — both return far less.

Parameter	Type	Notes
auction (required)	string	Public auction id or 24-character procedure id.
include	string[]	Sections to expand. Default ["items","terms"].

include values: items (area, cadastral number, address, classification) · terms (starting price, minimal step, guarantee deposit, registration fee, lease duration, conditions, restrictions) · documents · questions · bids · awards · contracts.

// Full picture before deciding whether to bid
{"auction": "SPD001-UA-20260806-70620",
 "include": ["items", "terms", "documents", "questions"]}

// Minimal lookup
{"auction": "LRE001-UA-20260708-03894"}

get_auction_timeline

The stage clock: what has passed, what is running, what is next, how long is left to bid.

Parameter	Type	Notes
auction (required)	string	Public auction id or procedure id.
include_revisions	boolean	Also list archived revisions, showing when the seller amended the terms. Default false.

{"auction": "LRE001-UA-20260708-03894"}
{"auction": "LRE001-UA-20260708-03894", "include_revisions": true}

Returns the status with its plain-language meaning, every stage marked past/current/upcoming, the next deadline, and bidding.closesAt / stillOpen / hoursRemaining.

get_auction_results

How an auction ended. Works on in-progress auctions too — reports outcome: "in_progress".

Parameter	Type	Notes
auction (required)	string	Public auction id or procedure id. No other parameters.

{"auction": "SPE001-UA-20260729-69703"}

Returns outcome (contract_signed · winner_determined · ended_without_winner · cancelled_by_seller · in_progress), starting vs final price with priceUpliftPercent, bid counts, attemptNumber (>1 means the lot failed to sell before), awards, contracts and cancellation reasons.

get_auction_documents

Published files with direct public download URLs.

Parameter	Type	Notes
auction (required)	string	Public auction id or procedure id.
document_type	string	Case-insensitive substring: technicalSpecifications, illustration, notice, contractSigned, transferAct, act, cancellationDetails…
include_attachments_of	string[]	auction (default), awards, contracts, cancellations.
include_superseded	boolean	Also list earlier revisions of replaced files. Default false.

// Just the technical specification
{"auction": "SPD001-UA-20260806-70620", "document_type": "technicalSpecifications"}

// The complete paper trail including the signed contract
{"auction": "SPD001-UA-20260806-70620",
 "include_attachments_of": ["auction", "awards", "contracts"]}

Documents attached to bids are never published.

find_comparable_auctions

Valuation and risk: what similar lots go for and how often they sell.

Parameter	Type	Notes
auction (required)	string	The reference auction.
match_on	string[]	What a comparable must share. Default ["sellingMethod","classification"]. Add region for a local benchmark, valueRange to stay within ±50% of the starting price.
concluded_only	boolean	Default true — compare only against finished auctions. false also shows what is currently on the market.
limit	number	1–50. Default 15.
scan_pages	number	Widen the sample when comparableCount is low.

// Price benchmark for a land lease (default matching)
{"auction": "LRE001-UA-20260708-03894",
 "match_on": ["sellingMethod", "classification"]}

// What similar assets are on the market right now
{"auction": "SPD001-UA-20260806-70620", "concluded_only": false, "limit": 25}

Re-listings of the same lot are excluded, so one asset is not counted twice.

track_auction_changes

Cursor-based monitoring. Repeated calls make forward progress without re-reading the same activity.

Parameter	Type	Notes
since	string	ISO instant to watch from. Default 24 hours ago. On follow-up polls pass back the previous response's nextCursor.
until	string	Optional upper bound.
procedure_type / status / keyword / region		Narrow the watch to one niche.
limit	number	1–100. Default 30.
scan_pages	number	Raise when a busy window truncates.

// First poll of a niche
{"procedure_type": ["landRental"], "region": "Полтав", "limit": 20}

// Follow-up poll using the cursor from the previous response
{"procedure_type": ["landRental"], "region": "Полтав",
 "since": "2026-08-06T06:27:21.880000Z"}

Each change carries an isNew flag distinguishing brand-new listings from updates. The cursor is inclusive, so the last auction may repeat once.

analyze_auction_market

Volume and trend questions rather than individual lots.

Parameter	Type	Notes
group_by	string	direction (default), sellingMethod, status, region, seller, propertyOwner.
since / until	string	Period to analyse. Omit both for the most recent activity.
procedure_type / status / region / keyword		Narrow the population before aggregating.
scan_pages	number	Default 15. Raise for a larger sample.

// Which regions had the most land activity recently
{"procedure_type": ["landRental", "landSell"], "group_by": "region", "scan_pages": 25}

// How privatisation performed in July 2026
{"procedure_type": ["smallPrivatization"], "since": "2026-07-01", "until": "2026-07-31",
 "group_by": "sellingMethod", "scan_pages": 30}

Returns count/total/mean/median/min/max starting prices, a status histogram and soldSharePercentOfSettled — where settled means complete, unsuccessful or cancelled only, so in-flight procedures do not inflate it. These figures describe the scanned window, not the whole catalogue.

list_procedure_types

The vocabulary the other tools filter on. Cached; no network cost after the first call. Call this rather than guessing a procedure_type — an unrecognised value silently returns nothing.

Parameter	Type	Notes
filter	string	Substring, e.g. "land", "lease", "privat", "timber".
include_status_glossary	boolean	Default true.

{"filter": "land"}
{}

Returns 33 programme families with their auction formats, the exact sellingMethod values, and the three-letter auction-id prefix each produces (LRE = landRental-english, SPE = smallPrivatization-english…), plus what each of the ten statuses means.

get_publication_constraints

The only forward-looking tool: if a lot is published today, how soon may the auction run.

Parameter	Type	Notes
procedure_type (required)	string	A selling method such as "landRental-english". A family name checks every format it supports at once, which is useful for comparing notice periods before choosing one.

{"procedure_type": "landRental-english"}
{"procedure_type": "smallPrivatization"}

Returns earliestAuctionStart and noticeDays. Computed live, so it is not cached.

Install

git clone https://github.com/VladyslavMykhailyshyn/prozorro-sale-mcp-server.git
cd prozorro-sale-mcp-server
npm install
npm run build

Claude Code

claude mcp add prozorro-sale -- node /absolute/path/to/prozorro-sale-mcp-server/build/index.js

Claude Desktop / any MCP client

{
  "mcpServers": {
    "prozorro-sale": {
      "command": "node",
      "args": ["/absolute/path/to/prozorro-sale-mcp-server/build/index.js"]
    }
  }
}

No API key is needed — Prozorro.Sale publishes this data openly.

Configuration

All optional; see .env.example. The variables are read from the process environment, so set them in your MCP client's env block.

Variable	Default	Purpose
PROZORRO_SALE_INSTANCE	production	production, staging (synthetic data) or dgf
PROZORRO_SALE_API_BASE	—	Full base URL override
PROZORRO_SALE_TIMEOUT_MS	45000	Per-request timeout
PROZORRO_SALE_CACHE_TTL_MS	120000	Feed-page cache lifetime
PROZORRO_SALE_DEFAULT_PAGES	8	Feed pages a search scans by default (100 auctions each)
PROZORRO_SALE_MAX_PAGES	40	Hard ceiling per call
PROZORRO_SALE_MAX_RETRIES	2	Retries on network/5xx errors

The one limitation worth understanding

Prozorro.Sale publishes no full-catalogue search API. The open-data surface is a change feed ordered by modification time, plus a per-selling-method feed of the 100 most recent auctions. There is no "all currently open auctions" endpoint to call.

This server therefore searches by scanning, and it is explicit about what it scanned. Every discovery tool returns a scanned block:

{
  "scanned": {
    "coveredFrom": "2026-08-06T06:12:41.000Z",
    "coveredTo": "now",
    "recordsScanned": 614,
    "truncated": true,
    "note": "Every auction changed in the last 3h was examined (614 records over 3 segments), then the page budget ran out while reaching further back. Auctions last changed before that are NOT fully represented — raise \"scan_pages\" or set an explicit window to go deeper."
  }
}

Two consequences to keep in mind:

• Name the asset programme when you can. procedure_type: ["smallPrivatization"] makes the server query the per-type feeds directly, which covers the 100 most recent auctions of each matching selling method instead of whatever happened to be busiest platform-wide.
• An empty result means "not in the scanned window", not "does not exist." Widen with scan_pages, or pass changed_since to scan a specific historical period.

The feed only runs forward in time from a cursor, so the newest records always sit at the end of a crawl. Starting at an arbitrary "7 days ago" would spend the whole page budget on old records and never reach the present. Instead the crawler walks a short window ending at now and then extends backwards in doubling segments while budget remains — so current auctions are always covered first.

Data notes

• Bidder and buyer identities are redacted upstream and appear as [redacted].
• Document downloadUrl values are public and can be fetched directly.
• Bid amounts become visible only after an auction concludes.
• auctionId encodes its programme and publication date: LRE (landRental-english) + serial
  • -UA- + 20260708 + serial.

Development

npm run typecheck   # tsc --noEmit
npm run build       # compile to build/
npm run smoke       # build, then exercise all 10 tools against the live API

scripts/smoke.mjs is an integration check, not a unit test — it hits production Prozorro.Sale and prints a one-line summary per tool.

License

ISC