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 2026-09-26T14:55:17Z in 0.173 seconds.

total_count:
6
hits:

6 results

  1. id:
    2026-105208
    buyer:

    1 results

    1. id:
      bed87b482aba566c9511f70f17cf6dc3
      organization_id:
      916075855
      name:
      FORSVARSMATERIELL
    heading:
    Opplag, tilsyn og vedlikehold av Forsvarsmateriells målfartøy - Kvalifisering
    description:
    FMA har som formål med denne anskaffelsen å inngå kontrakt med én leverandør for opplag, forsvarlig tilsyn og begrenset vedlikehold av målfartøy.Målfartøyene er tidligere marine- og kystvaktfartøy, og består av to fartøystyper: Nordkapp-klasse kystvakt og Hauk-klassen missiltorpedobåt (MTB) De er gruppert i denne anskaffelsen henholdsvis:Gruppa A: 2 stk. målfartøy på 36,5 meterGruppe B: 2 stk. målfartøy på 105 meter.Fartøyene er demilitarisert og miljøsertifisert.Det skal jevnlig utføres tilsyn og fortøyning av målfartøyene og tilhørende fortøyninger. I tillegg vil det ved levering, samt henting av målfartøyene stilles krav om tilstedeværelse og utførelse av fortøyningsarbeid.Oppdragsgiver vil overlevere målfartøyene med nødvendig fortøyningsmateriell som trosser, fendring og gangveier, samt dekke kostnader under avtaleperioden for slitasje/utskiftning av fortøyningsmateriell. Medgått tid vil bli inkludert i dette.Grunnleggende egenskaper for kaianlegget inkluderer:Kaianlegget for målfartøyene skal være dimensjonert slik at det oppnås sikker fortøyningVanndybden ved kai må også være stor nok slik at fartøyene ikke under noen omstendigheter kommer i kontakt med havbunnenVanndybden under MTB-drone må være tilstrekkelig slik at motor jevnlig kan startes og funksjonskontroll av gir og propell kan utføres.
    location_id:

    1 results

    1. NO071
    estimatedValue:
    currencyCode:
    NOK
    amount:
    30000000.0
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    EXPIRED
    issueDate:
    2026-03-16T10:01:48Z
    deadline:
    2026-04-17T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2026-03-17
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  2. id:
    2025-100056
    buyer:

    1 results

    1. id:
      3a706206f54ae960695997d1e07f0e31
      organization_id:
      940155223
      name:
      Gjøvikregionen - Anskaffelser
    heading:
    223064 anskaffelse av traktor til kommunalteknisk drift, Gjøvik kommune
    description:
    Traktor for kommunalteknisk drift i Gjøvik Kommune
    location_id:

    1 results

    1. NO020
    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:
    2025-01-02T14:12:20Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2025-01-06
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  3. id:
    2024-107089
    buyer:

    1 results

    1. id:
      3a706206f54ae960695997d1e07f0e31
      organization_id:
      940155223
      name:
      Gjøvikregionen - Anskaffelser
    heading:
    223064 anskaffelse av traktor til kommunalteknisk drift, Gjøvik kommune
    description:
    Traktor for kommunalteknisk drift i Gjøvik Kommune
    location_id:

    1 results

    1. NO020
    estimatedValue:
    not reported by source
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    AWARDED
    issueDate:
    2024-05-13T07:04:20Z
    deadline:
    2024-06-21T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2024-05-14
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  4. id:
    2024-105651
    buyer:

    1 results

    1. id:
      60806d385e03f47fee77aea6847d64b8
      organization_id:
      964965137
      name:
      Sandnes kommune
    heading:
    Rotorklipper
    description:
    Oppdragsgiver har behov for å inngå en kjøpsavtale på levering av én rotorklipper til Parkavdelingen for vedlikehold av plener og grøntområder. Rotorklipperen skal være i kontinuerlig drift i vekstsesongen.
    location_id:

    1 results

    1. NO0A1
    estimatedValue:
    currencyCode:
    NOK
    amount:
    480000.0
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    EXPIRED
    issueDate:
    2024-04-18T08:38:27Z
    deadline:
    2024-05-03T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2024-04-19
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  5. id:
    2020-379449
    buyer:

    1 results

    1. id:
      21e0ec453f1571192964e981a2097cfc
      organization_id:
      945578564
      name:
      Lillehammer Kommune
    heading:
    Anskaffelse Granulatrenser
    description:
    Lillehammer kommune har til hensikt og anskaffe maskiner for og suge opp, rense og legge tilbake forurenset granulat, på kunstgress fotballbaner i Lillehammer
    location_id:

    No results.

    estimatedValue:
    not reported by source
    type:
    ADVISORY_NOTICE
    allTypes:

    2 results

    1. ADVISORY_NOTICE
    2. PLANNING
    status:
    not reported by source
    issueDate:
    2020-05-15T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    no
    publicationDate:
    2020-05-15
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

  6. id:
    2017-914201
    buyer:

    1 results

    1. id:
      d14fbe2b23a14edef399068203a9c19e
      organization_id:
      964 980 098
      name:
      Stranda kommune
    heading:
    Kjøp av redskapsbærer inkludert innbytte av gammal maskin
    description:
    Ein redskapsbærer skal nyttast til å drive med diverse drift og vedlikehaldsoppgåver ute. Dette gjeld veg og samferdsel, vatn og avlaup, idrettsanlegg og parker, friområde og gravlundar for heile kommunen
    location_id:

    No results.

    estimatedValue:
    not reported by source
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    not reported by source
    issueDate:
    2017-09-22T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2017-09-22
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

limit:
25
offset:
0
returned:
6
has_more_results:
no
truncated:
no
Show all fields in HTML
total_count:
6
hits:

6 results

  1. id:
    2026-105208
    buyer:

    1 results

    1. id:
      bed87b482aba566c9511f70f17cf6dc3
      organization_id:
      916075855
      name:
      FORSVARSMATERIELL
    heading:
    Opplag, tilsyn og vedlikehold av Forsvarsmateriells målfartøy - Kvalifisering
    description:
    FMA har som formål med denne anskaffelsen å inngå kontrakt med én leverandør for opplag, forsvarlig tilsyn og begrenset vedlikehold av målfartøy.Målfartøyene er tidligere marine- og kystvaktfartøy, og består av to fartøystyper: Nordkapp-klasse kystvakt og Hauk-klassen missiltorpedobåt (MTB) De er gruppert i denne anskaffelsen henholdsvis:Gruppa A: 2 stk. målfartøy på 36,5 meterGruppe B: 2 stk. målfartøy på 105 meter.Fartøyene er demilitarisert og miljøsertifisert.Det skal jevnlig utføres tilsyn og fortøyning av målfartøyene og tilhørende fortøyninger. I tillegg vil det ved levering, samt henting av målfartøyene stilles krav om tilstedeværelse og utførelse av fortøyningsarbeid.Oppdragsgiver vil overlevere målfartøyene med nødvendig fortøyningsmateriell som trosser, fendring og gangveier, samt dekke kostnader under avtaleperioden for slitasje/utskiftning av fortøyningsmateriell. Medgått tid vil bli inkludert i dette.Grunnleggende egenskaper for kaianlegget inkluderer:Kaianlegget for målfartøyene skal være dimensjonert slik at det oppnås sikker fortøyningVanndybden ved kai må også være stor nok slik at fartøyene ikke under noen omstendigheter kommer i kontakt med havbunnenVanndybden under MTB-drone må være tilstrekkelig slik at motor jevnlig kan startes og funksjonskontroll av gir og propell kan utføres.
    location_id:

    1 results

    1. NO071
    estimatedValue:
    currencyCode:
    NOK
    amount:
    30000000.0
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    EXPIRED
    issueDate:
    2026-03-16T10:01:48Z
    deadline:
    2026-04-17T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2026-03-17
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  2. id:
    2025-100056
    buyer:

    1 results

    1. id:
      3a706206f54ae960695997d1e07f0e31
      organization_id:
      940155223
      name:
      Gjøvikregionen - Anskaffelser
    heading:
    223064 anskaffelse av traktor til kommunalteknisk drift, Gjøvik kommune
    description:
    Traktor for kommunalteknisk drift i Gjøvik Kommune
    location_id:

    1 results

    1. NO020
    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:
    2025-01-02T14:12:20Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2025-01-06
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  3. id:
    2024-107089
    buyer:

    1 results

    1. id:
      3a706206f54ae960695997d1e07f0e31
      organization_id:
      940155223
      name:
      Gjøvikregionen - Anskaffelser
    heading:
    223064 anskaffelse av traktor til kommunalteknisk drift, Gjøvik kommune
    description:
    Traktor for kommunalteknisk drift i Gjøvik Kommune
    location_id:

    1 results

    1. NO020
    estimatedValue:
    not reported by source
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    AWARDED
    issueDate:
    2024-05-13T07:04:20Z
    deadline:
    2024-06-21T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2024-05-14
    placeOfPerformance:
    procurementStrategicLabels:

    No results.

  4. id:
    2024-105651
    buyer:

    1 results

    1. id:
      60806d385e03f47fee77aea6847d64b8
      organization_id:
      964965137
      name:
      Sandnes kommune
    heading:
    Rotorklipper
    description:
    Oppdragsgiver har behov for å inngå en kjøpsavtale på levering av én rotorklipper til Parkavdelingen for vedlikehold av plener og grøntområder. Rotorklipperen skal være i kontinuerlig drift i vekstsesongen.
    location_id:

    1 results

    1. NO0A1
    estimatedValue:
    currencyCode:
    NOK
    amount:
    480000.0
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    EXPIRED
    issueDate:
    2024-04-18T08:38:27Z
    deadline:
    2024-05-03T10:00:00Z
    sentToTed:
    yes
    publicationDate:
    2024-04-19
    placeOfPerformance:
    procurementStrategicLabels:

    1 results

    1. ENVIRONMENT_PROCUREMENT
  5. id:
    2020-379449
    buyer:

    1 results

    1. id:
      21e0ec453f1571192964e981a2097cfc
      organization_id:
      945578564
      name:
      Lillehammer Kommune
    heading:
    Anskaffelse Granulatrenser
    description:
    Lillehammer kommune har til hensikt og anskaffe maskiner for og suge opp, rense og legge tilbake forurenset granulat, på kunstgress fotballbaner i Lillehammer
    location_id:

    No results.

    estimatedValue:
    not reported by source
    type:
    ADVISORY_NOTICE
    allTypes:

    2 results

    1. ADVISORY_NOTICE
    2. PLANNING
    status:
    not reported by source
    issueDate:
    2020-05-15T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    no
    publicationDate:
    2020-05-15
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

  6. id:
    2017-914201
    buyer:

    1 results

    1. id:
      d14fbe2b23a14edef399068203a9c19e
      organization_id:
      964 980 098
      name:
      Stranda kommune
    heading:
    Kjøp av redskapsbærer inkludert innbytte av gammal maskin
    description:
    Ein redskapsbærer skal nyttast til å drive med diverse drift og vedlikehaldsoppgåver ute. Dette gjeld veg og samferdsel, vatn og avlaup, idrettsanlegg og parker, friområde og gravlundar for heile kommunen
    location_id:

    No results.

    estimatedValue:
    not reported by source
    type:
    ANNOUNCEMENT_OF_COMPETITION
    allTypes:

    2 results

    1. COMPETITION
    2. ANNOUNCEMENT_OF_COMPETITION
    status:
    not reported by source
    issueDate:
    2017-09-22T10:00:00Z
    deadline:
    not reported by source
    sentToTed:
    yes
    publicationDate:
    2017-09-22
    placeOfPerformance:

    No results.

    procurementStrategicLabels:

    No results.

limit:
25
offset:
0
returned:
6
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.