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.

ParameterRequirementJSON typeDescription
queryoptionalstringFree-text search (Norwegian or English), e.g. "IT-drift", "snørydding", "rammeavtale konsulent". Start here.
typesoptionalunionFilter 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.
statusesoptionalunionACTIVE (open for bids), EXPIRED, AWARDED, CANCELLED.
contract_natureoptionalunionWORKS, SERVICES and/or SUPPLIES.
cpv_codesoptionalunion8-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.
locationsoptionalunionNUTS-style location ids, e.g. ["NO060"] (Trøndelag), or "anyw" for non-location-bound. See list_location_codes().
buyeroptionalunionBuyer 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.
winneroptionalunionDoffin's internal supplier id (32-hex). Winner names cannot be used - they are not present in search results to resolve against.
date_fromoptionalunionPublication date lower bound, "YYYY-MM-DD".
date_tooptionalunionPublication date upper bound, "YYYY-MM-DD".
sort_byoptionalstringRELEVANCE (default), PUBLICATION_DATE_DESC, PUBLICATION_DATE_ASC, DEADLINE, ESTIMATED_VALUE_ASC, ESTIMATED_VALUE_DESC.
pageoptionalinteger1-based page number.
hits_per_pageoptionalinteger1-50 (default 10).
include_placeholdersoptionalbooleanBy 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.
limitoptionalintegerGateway page size; default 25, maximum 100.
offsetoptionalintegerNumber 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.

Type: string. Free-text search (Norwegian or English), e.g. "IT-drift", "snørydding", "rammeavtale konsulent". Start here.
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.
Type: list of string (comma-separated). ACTIVE (open for bids), EXPIRED, AWARDED, CANCELLED.
Type: list of string (comma-separated). WORKS, SERVICES and/or SUPPLIES.
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.
Type: list of string (comma-separated). NUTS-style location ids, e.g. ["NO060"] (Trøndelag), or "anyw" for non-location-bound. See list_location_codes().
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.
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.
Type: string. Publication date lower bound, "YYYY-MM-DD".
Type: string. Publication date upper bound, "YYYY-MM-DD".
Type: string. RELEVANCE (default), PUBLICATION_DATE_DESC, PUBLICATION_DATE_ASC, DEADLINE, ESTIMATED_VALUE_ASC, ESTIMATED_VALUE_DESC.
Type: integer. 1-based page number.
Type: integer. 1-50 (default 10).
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 2026-09-26T15:46:19Z in 0.202 seconds.

total_count:
5
hits:

5 results

  1. id:
    2020-324026
    buyer:

    1 results

    1. id:
      0e58f4245b1087f308f9ac6bebac7553
      organization_id:
      911 770 709
      name:
      Universitetet i Sørøst-Norge (USN)
    heading:
    Sykehussenger og nattbord
    description:
    Sykehussenger med tilhørende nattbord som skal brukes i undervisning og øving for helsefag på de tre campusene Buskerud, Porsgrunn og Vestfold. Anskaffelses formål Anskaffelsens formål er å dekke behovet for sykehussenger med tilhørende nattbord til våre simuleringsrom på de tre campus Drammen, Porsgrunn og Vestfold. De vil bli brukt i undervisningen der studenter skal ha praktiske øvelser på simuleringsdukker i sykehussengene. Kontrakten Det vil bli inngått rammeavtale med én leverandør for hele oppdraget. Avtalen er en rammeavtale for 2 år med estimert oppstart . Oppdragsgiver skal ha mulighet til å prolongere avtalen 2 ganger à 12 måneder.
    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:
    2020-01-13T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2020-01-13
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

  2. id:
    2025-105785
    buyer:

    1 results

    1. id:
      7ba2bf884b133c0bb4fd4257b093fc86
      organization_id:
      814630722
      name:
      Sykehusbygg HF
    heading:
    K9812 Undersøkelses- og behandlingsstoler *KUNNGJØRING KONTRAKTSTILDELING*
    description:
    *KUNNGJØRING GJELDER KONTRAKTSTILDELING*Anskaffelsen gjelder nytt sykehus i Drammen (NSD).
    location_id:

    5 results

    1. NO085
    2. NO084
    3. NO083
    4. NO082
    5. NO081
    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:
    2025-04-09T09:42:35Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2025-04-10
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  3. id:
    2024-114894
    buyer:

    1 results

    1. id:
      7fcceaaff6948f767e629e00b5fcc8d1
      organization_id:
      916879067
      name:
      SYKEHUSINNKJØP HF
    heading:
    Vekter, stå-, senge-, stol-og spedbarnsvekter til helseforetakene i Midt-Norge
    description:
    Helse Midt-Norge, ved Sykehusinnkjøp, har gjennomført konkurranse hvor formålet var å inngå rammeavtale(r) med leverandør(er) av personvekter for Helse Midt-Norge, herunder stå-, senge-, stol-og spedbarnsvekter.
    location_id:

    2 results

    1. NO060
    2. NO0A3
    estimatedValue:
    currencyCode:
    NOK
    amount:
    3000000.0
    type:
    ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
    allTypes:

    2 results

    1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
    2. RESULT
    status:
    not reported by source
    issueDate:
    2024-10-17T10:58:02Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2024-10-18
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  4. id:
    2024-116435
    buyer:

    1 results

    1. id:
      a37539fb3c4ea782253069099793ae63
      organization_id:
      970940243
      name:
      Nord Universitet
    heading:
    Rammeavtale for medisinsk undervisningsutstyr, spesialutstyr til paramedisin, pasientsimulatorer og medisinske møbler
    description:
    Anskaffelsens formål er å inngå rammeavtale som skal dekke Nord universitets løpende behov for kjøp, levering, service og vedlikehold av medisinsk undervisningsutstyr, pasientsimulatorer og medisinske møbler, til riktig kvalitet, på en kostnadseffektiv og miljø- og samfunnsansvarlig måte. Anskaffelsen er delt opp i følgende delkontrakter - Delkontrakt 1: Undervisningsutstyr - Delkontrakt 2: Spesialutstyr til paramedisin - Delkontrakt 3: Medisinske møbler - Delkontrakt 4: Pasientsimulatorer
    location_id:

    2 results

    1. NO071
    2. NO060
    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:
    2024-11-14T09:41:23Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2024-11-15
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  5. id:
    2020-377243
    buyer:

    1 results

    1. id:
      eca4354c9fc2c7b0bca02a6b633314df
      organization_id:
      990 612 498
      name:
      Oslo kommune v/Sykehjemsetaten
    heading:
    Anskaffelse av løst inventar Ryen helsehus
    description:
    Ryen helsehus skal flytte inn i nytt bygg i løpet av våren 2020. I den forbindelse skal det nye helsehuset innredes. Ryen helsehus vil bestå av 4. etasjer. Underetasjen består av møterom, personalrom, kontor, behandlingsrom, kafe med mer. Beboerne holder til i 1 til 3 etasje. Det er totalt 142 beboerrom fordelt på 6 boenheter per etasje. Alle boenhetene har et felles oppholdsrom og anretningskjøkken som gir 6 i hver etasje og 18 totalt. I hver etasje er det også 2 kontorer og 4 medisinrom. Møblene skal leveres og monteres på Ryen helsehus i løpet av mai 2020. All emballasje skal tas med i retur. Anskaffelsen er delt i fire kapitler; sittemøbler, platemøbler, spesialmøbler og utemøbler. Tildeling vil skje per kapittel (sittemøbler, platemøbler, spesialmøbler og utemøbler), og leveransen kan således deles mellom flere leverandører.
    location_id:

    1 results

    1. anyw
    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:
    2020-01-29T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2020-01-29
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

limit:
25
offset:
0
returned:
5
has_more_results:
no
truncated:
no
Show all fields in HTML
total_count:
5
hits:

5 results

  1. id:
    2020-324026
    buyer:

    1 results

    1. id:
      0e58f4245b1087f308f9ac6bebac7553
      organization_id:
      911 770 709
      name:
      Universitetet i Sørøst-Norge (USN)
    heading:
    Sykehussenger og nattbord
    description:
    Sykehussenger med tilhørende nattbord som skal brukes i undervisning og øving for helsefag på de tre campusene Buskerud, Porsgrunn og Vestfold. Anskaffelses formål Anskaffelsens formål er å dekke behovet for sykehussenger med tilhørende nattbord til våre simuleringsrom på de tre campus Drammen, Porsgrunn og Vestfold. De vil bli brukt i undervisningen der studenter skal ha praktiske øvelser på simuleringsdukker i sykehussengene. Kontrakten Det vil bli inngått rammeavtale med én leverandør for hele oppdraget. Avtalen er en rammeavtale for 2 år med estimert oppstart . Oppdragsgiver skal ha mulighet til å prolongere avtalen 2 ganger à 12 måneder.
    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:
    2020-01-13T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2020-01-13
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

  2. id:
    2025-105785
    buyer:

    1 results

    1. id:
      7ba2bf884b133c0bb4fd4257b093fc86
      organization_id:
      814630722
      name:
      Sykehusbygg HF
    heading:
    K9812 Undersøkelses- og behandlingsstoler *KUNNGJØRING KONTRAKTSTILDELING*
    description:
    *KUNNGJØRING GJELDER KONTRAKTSTILDELING*Anskaffelsen gjelder nytt sykehus i Drammen (NSD).
    location_id:

    5 results

    1. NO085
    2. NO084
    3. NO083
    4. NO082
    5. NO081
    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:
    2025-04-09T09:42:35Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2025-04-10
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  3. id:
    2024-114894
    buyer:

    1 results

    1. id:
      7fcceaaff6948f767e629e00b5fcc8d1
      organization_id:
      916879067
      name:
      SYKEHUSINNKJØP HF
    heading:
    Vekter, stå-, senge-, stol-og spedbarnsvekter til helseforetakene i Midt-Norge
    description:
    Helse Midt-Norge, ved Sykehusinnkjøp, har gjennomført konkurranse hvor formålet var å inngå rammeavtale(r) med leverandør(er) av personvekter for Helse Midt-Norge, herunder stå-, senge-, stol-og spedbarnsvekter.
    location_id:

    2 results

    1. NO060
    2. NO0A3
    estimatedValue:
    currencyCode:
    NOK
    amount:
    3000000.0
    type:
    ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
    allTypes:

    2 results

    1. ANNOUNCEMENT_OF_CONCLUSION_OF_CONTRACT
    2. RESULT
    status:
    not reported by source
    issueDate:
    2024-10-17T10:58:02Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2024-10-18
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  4. id:
    2024-116435
    buyer:

    1 results

    1. id:
      a37539fb3c4ea782253069099793ae63
      organization_id:
      970940243
      name:
      Nord Universitet
    heading:
    Rammeavtale for medisinsk undervisningsutstyr, spesialutstyr til paramedisin, pasientsimulatorer og medisinske møbler
    description:
    Anskaffelsens formål er å inngå rammeavtale som skal dekke Nord universitets løpende behov for kjøp, levering, service og vedlikehold av medisinsk undervisningsutstyr, pasientsimulatorer og medisinske møbler, til riktig kvalitet, på en kostnadseffektiv og miljø- og samfunnsansvarlig måte. Anskaffelsen er delt opp i følgende delkontrakter - Delkontrakt 1: Undervisningsutstyr - Delkontrakt 2: Spesialutstyr til paramedisin - Delkontrakt 3: Medisinske møbler - Delkontrakt 4: Pasientsimulatorer
    location_id:

    2 results

    1. NO071
    2. NO060
    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:
    2024-11-14T09:41:23Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2024-11-15
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  5. id:
    2020-377243
    buyer:

    1 results

    1. id:
      eca4354c9fc2c7b0bca02a6b633314df
      organization_id:
      990 612 498
      name:
      Oslo kommune v/Sykehjemsetaten
    heading:
    Anskaffelse av løst inventar Ryen helsehus
    description:
    Ryen helsehus skal flytte inn i nytt bygg i løpet av våren 2020. I den forbindelse skal det nye helsehuset innredes. Ryen helsehus vil bestå av 4. etasjer. Underetasjen består av møterom, personalrom, kontor, behandlingsrom, kafe med mer. Beboerne holder til i 1 til 3 etasje. Det er totalt 142 beboerrom fordelt på 6 boenheter per etasje. Alle boenhetene har et felles oppholdsrom og anretningskjøkken som gir 6 i hver etasje og 18 totalt. I hver etasje er det også 2 kontorer og 4 medisinrom. Møblene skal leveres og monteres på Ryen helsehus i løpet av mai 2020. All emballasje skal tas med i retur. Anskaffelsen er delt i fire kapitler; sittemøbler, platemøbler, spesialmøbler og utemøbler. Tildeling vil skje per kapittel (sittemøbler, platemøbler, spesialmøbler og utemøbler), og leveransen kan således deles mellom flere leverandører.
    location_id:

    1 results

    1. anyw
    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:
    2020-01-29T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2020-01-29
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

limit:
25
offset:
0
returned:
5
has_more_results:
no
truncated:
no
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

  1. Replace the placeholders in the HTML GET template; remove optional parameters you do not need.
  2. Check types, units, limits and ID formats in the parameter table.
  3. 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

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.