---
title: "Works funded by a given funder"
method: GET
path: "/api/v1/research/crossref/funder/{funder_id}/works"
tags: ["Research"]
---

# Works funded by a given funder

`GET /api/v1/research/crossref/funder/{funder_id}/works`

List works acknowledging a specific funder from the Crossref Funder Registry. Funder IDs are numeric Funder Registry DOI suffixes (e.g. `100000001` = NSF, `501100000780` = European Commission). Supports publication-type and date-range filters. Data licensed CC0 by Crossref.

## Path parameters

- `funder_id` string, required — Funder Registry DOI suffix (numeric). Example: `100000001` for the US National Science Foundation.

## Query parameters

- `type` string, nullable — Publication-type filter (see `/types`).
- `from_date` string, nullable — Publication-date lower bound, ISO 8601.
- `to_date` string, nullable — Publication-date upper bound, ISO 8601.
- `limit` integer — Items per page (1 to 1000).
- `offset` integer — Zero-based offset (cursor pagination when >10,000).

## Response `200`

Funded works with pagination block.

- EnvelopeCrossrefWorksListPayload
  - `data` CrossrefWorksListPayload, required — Response payload for `/api/v1/research/crossref/search` and related list endpoints.
    - `items` CrossrefWork[], required — Work records matching the query, in upstream-supplied order.
      - `DOI` string, nullable — DOI of the work (canonical Crossref identifier).
      - `title` string[], nullable — Title strings (usually one-element list).
      - `subtitle` string[], nullable — Subtitle strings when deposited.
      - `short-title` string[], nullable — Abbreviated title forms when deposited.
      - `original-title` string[], nullable — Original-language title when deposited.
      - `container-title` string[], nullable — Journal / book / proceedings title (as a list).
      - `short-container-title` string[], nullable — Abbreviated container title (e.g. `Nature`).
      - `type` string, nullable — Publication type (e.g. `journal-article`, `book-chapter`; see `/types`).
      - `publisher` string, nullable — Publisher name as filed with Crossref.
      - `member` string, nullable — Crossref member ID of the publisher.
      - `prefix` string, nullable — DOI prefix (first segment of the DOI, identifies the owning publisher).
      - `volume` string, nullable — Volume label of the containing title.
      - `issue` string, nullable — Issue label of the containing title.
      - `page` string, nullable — Page range (e.g. `54-58`).
      - `article-number` string, nullable — Article or citation number inside the issue.
      - `ISSN` string[], nullable — ISSNs attached to the containing journal.
      - `issn-type` CrossrefIssnType[], nullable — Typed ISSN entries identifying print vs electronic forms.
        - `value` string, nullable — ISSN string (8 chars including hyphen).
        - `type` string, nullable — ISSN type (`print`, `electronic`, `linking`).
      - `ISBN` string[], nullable — ISBNs attached when the container is a book.
      - `language` string, nullable — BCP 47 language code of the work.
      - `subject` string[], nullable — Subject category labels assigned by Crossref.
      - `author` CrossrefAuthor[], nullable — Author list with names, ORCIDs, and affiliations.
        - `given` string, nullable — Given (first) name of the author as filed.
        - `family` string, nullable — Family (last) name of the author as filed.
        - `name` string, nullable — Single-field name used when given/family are not split.
        - `sequence` string, nullable — Author order tag (`first`, `additional`).
        - `ORCID` string, nullable — ORCID iD URL (e.g. `http://orcid.org/0000-0002-1825-0097`) when provided.
        - `authenticated-orcid` boolean, nullable — True when the ORCID iD has been authenticated by the author at deposit time.
        - `affiliation` object[], nullable — List of affiliation records each carrying a `name` and optional `id[]` block (ROR, ISNI, Wikidata).
        - `suffix` string, nullable — Name suffix (e.g. `Jr.`, `III`).
      - `editor` CrossrefAuthor[], nullable — Editor list (used for books and edited volumes).
        - `given` string, nullable — Given (first) name of the author as filed.
        - `family` string, nullable — Family (last) name of the author as filed.
        - `name` string, nullable — Single-field name used when given/family are not split.
        - `sequence` string, nullable — Author order tag (`first`, `additional`).
        - `ORCID` string, nullable — ORCID iD URL (e.g. `http://orcid.org/0000-0002-1825-0097`) when provided.
        - `authenticated-orcid` boolean, nullable — True when the ORCID iD has been authenticated by the author at deposit time.
        - `affiliation` object[], nullable — List of affiliation records each carrying a `name` and optional `id[]` block (ROR, ISNI, Wikidata).
        - `suffix` string, nullable — Name suffix (e.g. `Jr.`, `III`).
      - `chair` CrossrefAuthor[], nullable — Chair list (used for proceedings).
        - `given` string, nullable — Given (first) name of the author as filed.
        - `family` string, nullable — Family (last) name of the author as filed.
        - `name` string, nullable — Single-field name used when given/family are not split.
        - `sequence` string, nullable — Author order tag (`first`, `additional`).
        - `ORCID` string, nullable — ORCID iD URL (e.g. `http://orcid.org/0000-0002-1825-0097`) when provided.
        - `authenticated-orcid` boolean, nullable — True when the ORCID iD has been authenticated by the author at deposit time.
        - `affiliation` object[], nullable — List of affiliation records each carrying a `name` and optional `id[]` block (ROR, ISNI, Wikidata).
        - `suffix` string, nullable — Name suffix (e.g. `Jr.`, `III`).
      - `translator` CrossrefAuthor[], nullable — Translator list when deposited.
        - `given` string, nullable — Given (first) name of the author as filed.
        - `family` string, nullable — Family (last) name of the author as filed.
        - `name` string, nullable — Single-field name used when given/family are not split.
        - `sequence` string, nullable — Author order tag (`first`, `additional`).
        - `ORCID` string, nullable — ORCID iD URL (e.g. `http://orcid.org/0000-0002-1825-0097`) when provided.
        - `authenticated-orcid` boolean, nullable — True when the ORCID iD has been authenticated by the author at deposit time.
        - `affiliation` object[], nullable — List of affiliation records each carrying a `name` and optional `id[]` block (ROR, ISNI, Wikidata).
        - `suffix` string, nullable — Name suffix (e.g. `Jr.`, `III`).
      - `abstract` string, nullable — JATS-tagged abstract when deposited.
      - `published` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `published-online` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `published-print` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `issued` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `created` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `deposited` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `indexed` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
        - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
          - integer[]
        - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
        - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `reference-count` integer, nullable — Number of references deposited by the publisher.
      - `references-count` integer, nullable — Mirror of `reference-count` (some records carry only one or the other).
      - `is-referenced-by-count` integer, nullable — Count of other Crossref works that cite this DOI (inbound citation count).
      - `reference` CrossrefReference[], nullable — Deposited reference list (outbound citations). Present only when the publisher deposited references.
        - `key` string, nullable — Publisher-assigned reference key (e.g. `ref_1`).
        - `DOI` string, nullable — DOI of the cited work when deposited.
        - `doi-asserted-by` string, nullable — Entity that asserted the DOI mapping (`publisher` or `crossref`).
        - `unstructured` string, nullable — Free-text citation when no structured DOI or metadata is available.
        - `article-title` string, nullable — Title of the cited article when structured.
        - `journal-title` string, nullable — Journal title for the cited article when structured.
        - `volume-title` string, nullable — Volume or book title when citing a chapter or edited volume.
        - `author` string, nullable — Author surname string for the cited work.
        - `year` string, nullable — Publication year string for the cited work.
        - `volume` string, nullable — Volume number of the cited work.
        - `issue` string, nullable — Issue number of the cited work.
        - `first-page` string, nullable — First page of the cited work.
        - `ISSN` string, nullable — ISSN of the cited journal.
        - `isbn-type` string, nullable — ISBN type (e.g. `print`, `electronic`).
        - `component` string, nullable — Component identifier (used when citing book chapters or data).
      - `license` CrossrefLicense[], nullable — License blocks deposited with the work.
        - `URL` string, nullable — License URL as deposited (casing is publisher-dependent).
        - `content-version` string, nullable — License applies to which version of the work (`vor` = version of record, `am` = accepted manuscript, `tdm` = text-mining access).
        - `delay-in-days` integer, nullable — Number of days between work publication and license effective date.
        - `start` CrossrefPartialDate — Partial-precision date as Crossref returns it (array of date parts).
          - `date-parts` array[], nullable — Nested array of `[[year, month, day]]`. Month and day may be absent for year-only precision.
            - integer[]
          - `date-time` string, nullable — ISO 8601 UTC timestamp when upstream publishes a single-point-in-time value alongside the parts.
          - `timestamp` integer, nullable — Millisecond UNIX timestamp mirror of `date-time`.
      - `link` CrossrefLink[], nullable — Full-text and text-mining links deposited with the work.
        - `URL` string, nullable — Full URL to the resource.
        - `content-type` string, nullable — MIME type of the linked resource (e.g. `application/pdf`, `text/html`).
        - `content-version` string, nullable — Version of the content at this URL (`vor`, `am`, `tdm`, `unspecified`).
        - `intended-application` string, nullable — What the link is for (`text-mining`, `similarity-checking`, `syndication`).
      - `funder` CrossrefFunder[], nullable — Funder acknowledgements with award identifiers.
        - `name` string, nullable — Funder name as deposited.
        - `DOI` string, nullable — Funder Registry DOI (e.g. `10.13039/100000001` for NSF).
        - `doi-asserted-by` string, nullable — Entity that asserted the funder DOI mapping (`publisher` or `crossref`).
        - `award` string[], nullable — List of award identifiers (grant numbers) associated with the funding.
      - `resource` CrossrefResource — Primary-resource pointer for a work.
        - `primary` object, nullable — Primary resource block, typically carrying `URL` pointing at the publisher landing page.
      - `URL` string, nullable — Canonical `https://doi.org/...` URL for the work.
      - `source` string, nullable — Upstream source label (always `Crossref`).
      - `score` number, nullable — Relevance score assigned by the search engine on query endpoints.
      - `update-policy` string, nullable — Update-policy DOI announcing retractions or corrections for this work.
      - `updated-by` object[], nullable — List of update events (DOIs and labels) pointing at retractions or corrections for this work.
      - `content-domain` object, nullable — Controlled vocabulary for the content domain (crossmark, domain lists).
      - `relation` object, nullable — Related-works graph (references, cites, translates, is-version-of).
      - `assertion` object[], nullable — Publisher assertions (peer-review status, competing interests) attached via the Crossmark service.
      - `alternative-id` string[], nullable — Alternative publisher identifiers for the work (internal manuscript IDs).
    - `list_meta` CrossrefListMeta, required — Pagination and totals block echoed on every list endpoint.
      - `total_results` integer, nullable — Total number of items matching the query across all pages.
      - `items_per_page` integer, nullable — Page size used for this response (`rows`).
      - `next_cursor` string, nullable — Opaque cursor for the next page when cursor pagination is in use. Null when no next page.
  - `meta` SugraMeta, required — Metadata on a /api/v1/* response envelope built through `helpers.response.sugra_response`, which is how routes are expected to answer. A route that assembles its own `meta` dict carries only the keys it writes itself, so an optional field below can be absent because this response has nothing to report OR because that route does not build its envelope here - the two are not distinguishable from the outside (API-43).
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 timestamp the data on this response is stamped with. It is the source's own timestamp whenever the source supplied one this API could read; when it did not, this field falls back to the value of `response_time` and `data_age_days` is omitted, so the PRESENCE of that field is the signal to read - with the one exception named in its own description, a route that substitutes its own current time for a source timestamp it never received. Usually UTC (`Z`), but a source stating its own numeric offset keeps it (2026-04-16T14:30:00+09:00) rather than being converted a second time. For a source that publishes by period this is the period's START (see `period`) and for one that publishes by calendar day it is that day's midnight - in neither case a moment at which anything was observed or released.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `data_age_days` number, nullable — Age of the data in days at the moment this response was produced, i.e. `response_time` minus `data_time`. Present ONLY when the timestamp this response is stamped with is a clock time that could be read as a real instant. It is ABSENT - never 0 - in every other case. Absent when no readable source timestamp was supplied, because `data_time` then repeats `response_time` and a zero age would assert that the data is current precisely where its true age is unknown. Absent when the source names a calendar day, a month, a quarter or a year (see `period`): the instant is then a boundary this API anchored at midnight, and time since a day or a quarter BEGAN is a different quantity from the age of the data - a daily series is out by up to a day, a quarterly one by up to a quarter. A midnight counts as such a boundary whichever zone it is stated in, and whether the source stated it or this API anchored it. The one case this field cannot see is a route that substitutes its own current time for a source timestamp it never received: the substituted value is a real, readable instant and is indistinguishable from one the source stated, so the age reads as roughly 0. The shared cache-and-fetch helper behind most routes stopped doing that (API-43), but the presence of this field is a statement about the timestamp the response carries, not a guarantee about the route that supplied it. Rounded to 0.001 day (86.4 seconds), so 0.0 is a real measured age anywhere within roughly +/-43 seconds and not a stand-in for unknown; a source stamping an instant in the future reports a negative value (-0.001 or less) rather than being clamped. Sources publish on very different cadences, so a non-zero age is normal, not an error. Preserve absence in client code: a generated client that materialises a missing optional number as its numeric default turns 'age unknown' back into 'age zero', which is the exact confusion this field exists to remove.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.
    - `period` string, nullable — Unit of observation, when the source publishes by period rather than by instant. `data_time` carries the period's START instant so it stays machine-readable; this field preserves what that instant used to mean, which the conversion would otherwise erase. Present only for such sources, and only when the source hands the API the label itself - a client that converts the period to its start instant before building the envelope loses the label, though not the age exclusion, which is decided by the instant. Note that `data_age_days` is omitted whenever this is present, because an age measured from a period start is not a freshness figure.
    - `notes` string, nullable — Data-quality caveat about THIS response - how old the underlying report is, a chokepoint AIS lower-bound, or that a source-reported `data_time` could not be read and the response time is shown instead. Distinct from `attribution`, which is a licensing obligation. Multiple caveats are joined with ' | '. Present only when there is one.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

## Changes

- **2026-09-01** `328d061c12ca` — 3 info
  - added the optional property `meta/data_age_days` to the response with the `200` status
  - added the optional property `meta/notes` to the response with the `200` status
  - added the optional property `meta/period` to the response with the `200` status
- **2026-08-08** `4c4530760ba1` — 12 info
  - added the optional property `code` to the response with the `401` status
  - added the optional property `code` to the response with the `429` status
  - added the optional property `code` to the response with the `503` status
  - added the optional property `hint` to the response with the `401` status
  - …8 more

[Change history](https://skmtc.dev/sugra/apis/sugra-api/changes/api/v1/research/crossref/funder/:funder_id/works/get.md)

---

[API](https://skmtc.dev/sugra/apis/sugra-api.md) · [All operations](https://skmtc.dev/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sugra/sugra-api/revisions/68953d8a221b/schema)