search_doffin

Search Norwegian public procurement notices on Doffin.

Signature: search_doffin(query: string, optional, default ''; types: list of string (comma-separated), optional, default None; statuses: list of string (comma-separated), optional, default None; contract_nature: list of string (comma-separated), optional, default None; cpv_codes: list of string (comma-separated), optional, default None; locations: list of string (comma-separated), optional, default None; buyer: list of string (comma-separated), optional, default None; winner: list of string (comma-separated), optional, default None; date_from: string, optional, default None; date_to: string, optional, default None; sort_by: string, optional, default 'RELEVANCE'; page: integer, optional, default 1; hits_per_page: integer, optional, default 10; include_placeholders: yes/no, optional, default False; limit: integer, items, optional, default 25; offset: integer, items, optional, default 0)

Direct GET

For navigating agents: open the HTML page with parameters in the URL. The result is fetched and displayed without screenshots or form filling.

Open this validated HTML GET URL

https://allemannsdata.com/wiki/kilder/doffin/search_doffin/?query=&types={types}&statuses={statuses}&contract_nature={contract_nature}&cpv_codes={cpv_codes}&locations={locations}&buyer={buyer}&winner={winner}&date_from={date_from}&date_to={date_to}&sort_by=RELEVANCE&page=1&hits_per_page=10&include_placeholders=false&limit=25&offset=0

Replace {query}, {types}, {statuses}, {contract_nature}, {cpv_codes}, {locations}, {buyer}, {winner}, {date_from}, {date_to}, {sort_by}, {page}, {hits_per_page}, {include_placeholders} with values. Remove unused optional parameters from the URL.

For software and dashboards: Read the operation descriptor. The JSON GET template is https://allemannsdata.com/wiki/api/v1/kilder/doffin/search_doffin?query=&types={types}&statuses={statuses}&contract_nature={contract_nature}&cpv_codes={cpv_codes}&locations={locations}&buyer={buyer}&winner={winner}&date_from={date_from}&date_to={date_to}&sort_by=RELEVANCE&page=1&hits_per_page=10&include_placeholders=false&limit=25&offset=0. Open this exact request as JSON.

Parameter	Requirement	JSON type	Description
`query`	optional	string	Free-text search (Norwegian or English), e.g. "IT-drift", "snørydding", "rammeavtale konsulent". Start here.
`types`	optional	union	Filter by notice type. Parent types: PLANNING, COMPETITION, RESULT. Specific types: ANNOUNCEMENT_OF_COMPETITION, DYNAMIC_PURCHASING_SCHEME, QUALIFICATION_SCHEME, ANNOUNCEMENT_OF_INTENT, PRE_ANNOUNCEMENT, ADVISORY_NOTICE, NOTICE_ON_BUYER_PROFILE, ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT, CHANGE_OF_CONCLUSION_OF_CONTRACT, CANCELLED_OR_MISSING_CONCLUSION_OF_CONTRACT. Use ["COMPETITION"] + statuses=["ACTIVE"] for open tenders.
`statuses`	optional	union	ACTIVE (open for bids), EXPIRED, AWARDED, CANCELLED.
`contract_nature`	optional	union	WORKS, SERVICES and/or SUPPLIES.
`cpv_codes`	optional	union	8-digit CPV codes, e.g. ["45000000"]. Matches the code and its children. Find codes with search_cpv_codes(). Best combined with a free-text query.
`locations`	optional	union	NUTS-style location ids, e.g. ["NO060"] (Trøndelag), or "anyw" for non-location-bound. See list_location_codes().
`buyer`	optional	union	Buyer organization full name(s) exactly as written on notices, e.g. ["Trondheim kommune"]. Resolved to Doffin's internal buyer id via a free-text lookup; names that match no buyer are reported in "note" and, if none match, no results are returned (rather than an unfiltered search). Pass the 32-hex buyer id from a result's buyer field directly to skip the lookup.
`winner`	optional	union	Doffin's internal supplier id (32-hex). Winner names cannot be used - they are not present in search results to resolve against.
`date_from`	optional	union	Publication date lower bound, "YYYY-MM-DD".
`date_to`	optional	union	Publication date upper bound, "YYYY-MM-DD".
`sort_by`	optional	string	RELEVANCE (default), PUBLICATION_DATE_DESC, PUBLICATION_DATE_ASC, DEADLINE, ESTIMATED_VALUE_ASC, ESTIMATED_VALUE_DESC.
`page`	optional	integer	1-based page number.
`hits_per_page`	optional	integer	1-50 (default 10).
`include_placeholders`	optional	boolean	By default, hits whose buyer fields look like unfilled eForm template values (org id 123456789, placeholder buyer names) are dropped from the results as junk. Set True to keep them, each flagged with "possible_placeholder": true.
`limit`	optional	integer	Gateway page size; default 25, maximum 100.
`offset`	optional	integer	Number of list items to skip; default 0.

Generated JavaScript, Python and response structure

Use JSON when the user requests code, machine-readable data, value extraction or further computation. Use the HTML GET page to identify the correct source and verify parameters.

Example for generated JavaScript and Python

https://allemannsdata.com/wiki/api/v1/kilder/doffin/search_doffin?query=&types={types}&statuses={statuses}&contract_nature={contract_nature}&cpv_codes={cpv_codes}&locations={locations}&buyer={buyer}&winner={winner}&date_from={date_from}&date_to={date_to}&sort_by=RELEVANCE&page=1&hits_per_page=10&include_placeholders=false&limit=25&offset=0

Replace URL placeholders and remove unused optional parameters.

JavaScript in a dashboard

const url = "https://allemannsdata.com/wiki/api/v1/kilder/doffin/search_doffin?query=&types={types}&statuses={statuses}&contract_nature={contract_nature}&cpv_codes={cpv_codes}&locations={locations}&buyer={buyer}&winner={winner}&date_from={date_from}&date_to={date_to}&sort_by=RELEVANCE&page=1&hits_per_page=10&include_placeholders=false&limit=25&offset=0";
const response = await fetch(url);
if (!response.ok) {
  const failure = await response.json();
  throw new Error(`${failure.error.code}: ${failure.error.message} ${failure.suggestion}`);
}
const result = await response.json();
const data = result.data;

Python without additional packages

import json
from urllib.request import urlopen

url = "https://allemannsdata.com/wiki/api/v1/kilder/doffin/search_doffin?query=&types={types}&statuses={statuses}&contract_nature={contract_nature}&cpv_codes={cpv_codes}&locations={locations}&buyer={buyer}&winner={winner}&date_from={date_from}&date_to={date_to}&sort_by=RELEVANCE&page=1&hits_per_page=10&include_placeholders=false&limit=25&offset=0"
with urlopen(url) as response:
    result = json.load(response)
data = result["data"]

Response structure

{
  "source": "doffin",
  "operation": "search_doffin",
  "parameters": {},
  "data": {},
  "entities": [],
  "_meta": {"retrieved_at": "...", "sources": [], "cache": {}},
  "_links": {"self": "...", "source": "...", "wiki": "...", "feedback": "..."}
}

Form for manual use

The form is a fallback for people and browser agents that cannot open the GET URL directly.

query Type: string. Free-text search (Norwegian or English), e.g. "IT-drift", "snørydding", "rammeavtale konsulent". Start here.

types Type: list of string (comma-separated). Filter by notice type. Parent types: PLANNING, COMPETITION, RESULT. Specific types: ANNOUNCEMENT_OF_COMPETITION, DYNAMIC_PURCHASING_SCHEME, QUALIFICATION_SCHEME, ANNOUNCEMENT_OF_INTENT, PRE_ANNOUNCEMENT, ADVISORY_NOTICE, NOTICE_ON_BUYER_PROFILE, ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT, CHANGE_OF_CONCLUSION_OF_CONTRACT, CANCELLED_OR_MISSING_CONCLUSION_OF_CONTRACT. Use ["COMPETITION"] + statuses=["ACTIVE"] for open tenders.

statuses Type: list of string (comma-separated). ACTIVE (open for bids), EXPIRED, AWARDED, CANCELLED.

contract_nature Type: list of string (comma-separated). WORKS, SERVICES and/or SUPPLIES.

cpv_codes Type: list of string (comma-separated). 8-digit CPV codes, e.g. ["45000000"]. Matches the code and its children. Find codes with search_cpv_codes(). Best combined with a free-text query.

locations Type: list of string (comma-separated). NUTS-style location ids, e.g. ["NO060"] (Trøndelag), or "anyw" for non-location-bound. See list_location_codes().

buyer Type: list of string (comma-separated). Buyer organization full name(s) exactly as written on notices, e.g. ["Trondheim kommune"]. Resolved to Doffin's internal buyer id via a free-text lookup; names that match no buyer are reported in "note" and, if none match, no results are returned (rather than an unfiltered search). Pass the 32-hex buyer id from a result's buyer field directly to skip the lookup.

winner Type: list of string (comma-separated). Doffin's internal supplier id (32-hex). Winner names cannot be used - they are not present in search results to resolve against.

date_from Type: string. Publication date lower bound, "YYYY-MM-DD".

date_to Type: string. Publication date upper bound, "YYYY-MM-DD".

sort_by Type: string. RELEVANCE (default), PUBLICATION_DATE_DESC, PUBLICATION_DATE_ASC, DEADLINE, ESTIMATED_VALUE_ASC, ESTIMATED_VALUE_DESC.

page Type: integer. 1-based page number.

hits_per_page Type: integer. 1-50 (default 10).

include_placeholders Type: yes/no. By default, hits whose buyer fields look like unfilled eForm template values (org id 123456789, placeholder buyer names) are dropped from the results as junk. Set True to keep them, each flagged with "possible_placeholder": true.

Result

Source: Doffin and TED. Retrieved 2026-10-31T15:50:41Z in 0.150 seconds.

total_count:

hits:

6 results

id:
2025-120642
buyer:
1 results
1. id:
  ece64cbed397d681fa0c3dc1293061a8
  organization_id:
  917082308
  name:
  Bane NOR SF
heading:
Biladministrasjon og operasjonell leasing
description:
Rammeavtale på biladministrasjon og operasjonell leasing
location_id:
1 results
1. anyw
estimatedValue:
currencyCode:
NOK
amount:
1700000000.0
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2025-12-17T12:47:38Z
deadline:
2029-11-01T00:00:00Z
sentToTed:
yes
publicationDate:
2025-12-18
placeOfPerformance:
- Ikke stedbunden
procurementStrategicLabels:
No results.
id:
2022-644332
buyer:
1 results
1. id:
  0e58f4245b1087f308f9ac6bebac7553
  organization_id:
  911 770 709
  name:
  Universitetet i Sørøst-Norge (USN)
heading:
Leasing av kjøretøy
description:
Universitet i Sørøst-Norge (USN) skal inngå en rammeavtale med en leverandør på leasing av kjøretøy. Biladministrasjon skal inngå som en opsjon.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2022-12-07T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2022-12-07
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2020-358794
buyer:
1 results
1. id:
  8fad0b4711ec539dd006b97e4e017474
  organization_id:
  920 415 288
  name:
  Ålesund kommune
heading:
Anskaffelse - Varebiler Søre Sunnmøre, 2020
description:
Formålet med anskaffelsen er å dekke kundens behov for anskaffelser av varebiler, ved behov, i henhold til kravspesifikasjon. Varebiler har et bredt bruksområde og blir benyttet innenfor de fleste kommunale virksomhetsområder. Anskaffelsen omhandler både kjøp og leasing av varebiler i ulike størrelser. Avtalen er inndelt i segmentene null-utslipp og forbrenning.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2020-10-20T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2020-10-20
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2020-394228
buyer:
1 results
1. id:
  8fad0b4711ec539dd006b97e4e017474
  organization_id:
  920 415 288
  name:
  Ålesund kommune
heading:
Anskaffelse - Varebiler Søre Sunnmøre, 2020
description:
Formålet med anskaffelsen er å dekke kundens behov for anskaffelser av varebiler, ved behov, i henhold til kravspesifikasjon. Varebiler har et bredt bruksområde og blir benyttet innenfor de fleste kommunale virksomhetsområder. Anskaffelsen omhandler både kjøp og leasing av varebiler i ulike størrelser. Avtalen er inndelt i segmentene null-utslipp og forbrenning.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2020-08-04T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2020-08-04
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2023-644000
buyer:
1 results
1. id:
  3a706206f54ae960695997d1e07f0e31
  organization_id:
  940155223
  name:
  Gjøvikregionen - Anskaffelser
heading:
211859 - Kontraktsinngåelse - anskaffelse av tjenestebiler til kommuner i Gjøvikregionen
description:
Oppdragsgiver har inngått 3 del-kontrakter om levering av operasjonell leasing av 80 kjøretøy med tjenester i tilknytning til bilholdet for Gjøvik kommune og Vestre Toten kommune. Det er opsjon på inntil 10 biler i tillegg, som omfatter alle kommuner i Gjøvikregionen, det vil si også Østre Toten, Søndre Land og Nordre Land.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2023-02-02T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2023-02-02
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2024-101016
buyer:
1 results
1. id:
  4c4f51be27b9d9b28b1bc80b42eb4921
  organization_id:
  933649768
  name:
  Øvre Romerike Innkjøpssamarbeid
heading:
(2023-111) Kjøp og leie av biler, rammeavtale
description:
Konkurransen gjelder rammeavtale på kjøp og leasing/langtidsleie av biler og biladministrasjon med tilhørende servicetjenester. Oppdragsgiver i denne rammeavtalen er Øvre Romerike Innkjøpssamarbeid (ØRIK). Øvre Romerike Innkjøpssamarbeid (ØRIK) er et forpliktende samarbeid mellom kommunene Eidsvoll, Gjerdrum, Hurdal, Nannestad, Nes og Ullensaker. Gjennom ØRIK skal disse kommunene så langt det er praktisk mulig søke samarbeid ved inngåelse av innkjøpsavtaler for varer og tjenester. Anskaffelsens verdi anslås til: NOK 30.000.000,- eks. mva per år. Maksimalverdi for hele avtaleperioden, inkludert eventuelle opsjoner og forventet prisstigning: NOK 150.000.000,- eks mva. Behovet er usikkert. Volumet kan variere både opp og ned, og vil i avtaleperioden være avhengig av blant annet oppdragsgivers behov, aktiviteter, budsjettsituasjon og andre rammefaktorer. For nærmere informasjon viser vi til anskaffelsesdokumentene.
location_id:
4 results
1. NO085
2. NO084
3. NO083
4. NO082
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2024-01-23T13:58:30Z
deadline:
2026-01-30T23:00:00Z
sentToTed:
yes
publicationDate:
2024-01-24
placeOfPerformance:
- Viken
procurementStrategicLabels:
No results.

limit:

offset:

returned:

has_more_results:

Show all fields in HTML

total_count:

hits:

6 results

id:
2025-120642
buyer:
1 results
1. id:
  ece64cbed397d681fa0c3dc1293061a8
  organization_id:
  917082308
  name:
  Bane NOR SF
heading:
Biladministrasjon og operasjonell leasing
description:
Rammeavtale på biladministrasjon og operasjonell leasing
location_id:
1 results
1. anyw
estimatedValue:
currencyCode:
NOK
amount:
1700000000.0
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2025-12-17T12:47:38Z
deadline:
2029-11-01T00:00:00Z
sentToTed:
yes
publicationDate:
2025-12-18
placeOfPerformance:
- Ikke stedbunden
procurementStrategicLabels:
No results.
id:
2022-644332
buyer:
1 results
1. id:
  0e58f4245b1087f308f9ac6bebac7553
  organization_id:
  911 770 709
  name:
  Universitetet i Sørøst-Norge (USN)
heading:
Leasing av kjøretøy
description:
Universitet i Sørøst-Norge (USN) skal inngå en rammeavtale med en leverandør på leasing av kjøretøy. Biladministrasjon skal inngå som en opsjon.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2022-12-07T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2022-12-07
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2020-358794
buyer:
1 results
1. id:
  8fad0b4711ec539dd006b97e4e017474
  organization_id:
  920 415 288
  name:
  Ålesund kommune
heading:
Anskaffelse - Varebiler Søre Sunnmøre, 2020
description:
Formålet med anskaffelsen er å dekke kundens behov for anskaffelser av varebiler, ved behov, i henhold til kravspesifikasjon. Varebiler har et bredt bruksområde og blir benyttet innenfor de fleste kommunale virksomhetsområder. Anskaffelsen omhandler både kjøp og leasing av varebiler i ulike størrelser. Avtalen er inndelt i segmentene null-utslipp og forbrenning.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2020-10-20T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2020-10-20
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2020-394228
buyer:
1 results
1. id:
  8fad0b4711ec539dd006b97e4e017474
  organization_id:
  920 415 288
  name:
  Ålesund kommune
heading:
Anskaffelse - Varebiler Søre Sunnmøre, 2020
description:
Formålet med anskaffelsen er å dekke kundens behov for anskaffelser av varebiler, ved behov, i henhold til kravspesifikasjon. Varebiler har et bredt bruksområde og blir benyttet innenfor de fleste kommunale virksomhetsområder. Anskaffelsen omhandler både kjøp og leasing av varebiler i ulike størrelser. Avtalen er inndelt i segmentene null-utslipp og forbrenning.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2020-08-04T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2020-08-04
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2023-644000
buyer:
1 results
1. id:
  3a706206f54ae960695997d1e07f0e31
  organization_id:
  940155223
  name:
  Gjøvikregionen - Anskaffelser
heading:
211859 - Kontraktsinngåelse - anskaffelse av tjenestebiler til kommuner i Gjøvikregionen
description:
Oppdragsgiver har inngått 3 del-kontrakter om levering av operasjonell leasing av 80 kjøretøy med tjenester i tilknytning til bilholdet for Gjøvik kommune og Vestre Toten kommune. Det er opsjon på inntil 10 biler i tillegg, som omfatter alle kommuner i Gjøvikregionen, det vil si også Østre Toten, Søndre Land og Nordre Land.
location_id:
No results.
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2023-02-02T10:00:00Z
deadline:
not reported by source
sentToTed:
yes
publicationDate:
2023-02-02
placeOfPerformance:
No results.
procurementStrategicLabels:
No results.
id:
2024-101016
buyer:
1 results
1. id:
  4c4f51be27b9d9b28b1bc80b42eb4921
  organization_id:
  933649768
  name:
  Øvre Romerike Innkjøpssamarbeid
heading:
(2023-111) Kjøp og leie av biler, rammeavtale
description:
Konkurransen gjelder rammeavtale på kjøp og leasing/langtidsleie av biler og biladministrasjon med tilhørende servicetjenester. Oppdragsgiver i denne rammeavtalen er Øvre Romerike Innkjøpssamarbeid (ØRIK). Øvre Romerike Innkjøpssamarbeid (ØRIK) er et forpliktende samarbeid mellom kommunene Eidsvoll, Gjerdrum, Hurdal, Nannestad, Nes og Ullensaker. Gjennom ØRIK skal disse kommunene så langt det er praktisk mulig søke samarbeid ved inngåelse av innkjøpsavtaler for varer og tjenester. Anskaffelsens verdi anslås til: NOK 30.000.000,- eks. mva per år. Maksimalverdi for hele avtaleperioden, inkludert eventuelle opsjoner og forventet prisstigning: NOK 150.000.000,- eks mva. Behovet er usikkert. Volumet kan variere både opp og ned, og vil i avtaleperioden være avhengig av blant annet oppdragsgivers behov, aktiviteter, budsjettsituasjon og andre rammefaktorer. For nærmere informasjon viser vi til anskaffelsesdokumentene.
location_id:
4 results
1. NO085
2. NO084
3. NO083
4. NO082
estimatedValue:
not reported by source
type:
ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
allTypes:
2 results
1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
2. RESULT
status:
not reported by source
issueDate:
2024-01-23T13:58:30Z
deadline:
2026-01-30T23:00:00Z
sentToTed:
yes
publicationDate:
2024-01-24
placeOfPerformance:
- Viken
procurementStrategicLabels:
No results.

limit:

offset:

returned:

has_more_results:

Will you use the result in generated code?

Open the same result as JSON

Is data missing or incorrect? Send feedback about this result.

Continue exploring

How an AI agent should use this page

Ground rule: Navigate with HTML GET links to keep explanations and relationships. Use the page's JSON alternative only when concrete values must be extracted, compared or computed.

How to use the search_doffin lookup

Replace the placeholders in the HTML GET template; remove optional parameters you do not need.
Check types, units, limits and ID formats in the parameter table.
Follow linked results to canonical pages before combining sources.

Misreading to avoid: An empty list means "no results for this lookup". An error message or unavailable source does not mean the data does not exist.

Source-specific next step

Follow the notice ID to the canonical page; use CPV and location codes to narrow broad free-text searches.

Go to the source page for other operations. Use the JSON template only after the HTML result shows that the parameters and source are correct.

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