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SBIR/STTR

The SBIR/STTR endpoints expose Small Business Innovation Research and Small Business Technology Transfer topics across every participating agency (DoD, NIH, NSF, NASA, DOE, DOT and more), plus the DoD DSIP solicitation cycles they belong to. For field definitions, see the SBIR Data Dictionary.

Authentication: SBIR endpoints require authentication (API key or OAuth2). Unauthenticated requests receive HTTP 401. Available on every plan, including Free — no tier gating on any field.

Endpoints

  • GET /api/sbir/topics/ — SBIR/STTR topics (all agencies). Detail lookup by topic_id.
  • GET /api/sbir/solicitations/ — DoD DSIP solicitation cycles. Detail lookup by solicitation_id.

Each topic belongs to a parent that funds it — a DoD DSIP cycle, a SAM.gov notice, or a Grants.gov announcement — so you can follow a topic through to the opportunity or grant behind it. Topics span every participating agency; solicitations are DoD (DSIP) only.

Topics

GET /api/sbir/topics/ — one record per SBIR/STTR topic. Detail: GET /api/sbir/topics/{topic_id}/.

The parent ladder

Each topic links to at most one parent, resolved in priority order:

  1. solicitation(*) — the parent DoD DSIP cycle (most DoD topics).
  2. opportunity(*) — the parent SAM.gov notice (e.g. DOT, ARPA-H topics that hang off a notice).
  3. grant(*) — the parent Grants.gov announcement (e.g. NIH topics, joined on opportunity number).

A non-DoD topic with no DSIP parent returns solicitation: null and links through opportunity or grant instead. A topic's own close_date reflects its individual schedule and outranks the parent BAA's window — a topic can close on its own date inside an otherwise-open parent.

Lifecycle: activity

activity is derived at query time as open, closed, or unknown (topics with no usable date roster). Filter on it with ?activity=open. solicitation_status is sbir.gov's own raw Open/Closed string (source data, not derived) and is exposed separately.

Filtering

Date filters require YYYY-MM-DD (invalid dates or inverted ranges return 400, see Date filters). These filters are single-value (no | OR).

Param What it does
activity Lifecycle: open, closed, or unknown.
agency Raw agency text, partial match (e.g. DOD, NIH, NSF).
topic_number Topic number, partial match.
solicitation_number Parent solicitation (BAA) number, partial match.
year Solicitation year (exact).
doc_source Document source: grants_gov, dsip, sam_gov, other, none (exact, case-insensitive).
open_date_after, open_date_before Open-date range.
close_date_after, close_date_before Close-date range.
release_date_after, release_date_before Release-date range.
search Full-text search over title, description, and topic number.

There is no program filter on topics — SBIR/STTR program lives on the parent solicitation. Filter topics by their parent instead (solicitation_number), or query /api/sbir/solicitations/?program=STTR.

Ordering

ordering= allowlist: activity, close_date, open_date, release_date, year, modified. Default is newest-modified first.

Shaping

  • List default: topic_id, title, agency, year, topic_number, solicitation_number, release_date, open_date, close_date, activity, solicitation_status, topic_url, official_solicitation_url
  • Detail default: every allowed leaf field plus solicitation(*), opportunity(*), grant(*)

Expandable relations and the keys they resolve to:

  • solicitation(*) → solicitation_id, solicitation_number, title, program, cycle_name, year, start_date, end_date, out_of_cycle, solicitation_status
  • opportunity(*) → opportunity_id, title, solicitation_number, response_deadline
  • grant(*) → grant_id, opportunity_number, title, response_date

Solicitations

GET /api/sbir/solicitations/ — one record per DoD DSIP solicitation cycle. Detail: GET /api/sbir/solicitations/{solicitation_id}/.

Lifecycle: activity

activity is derived from end_date as open or closed (no unknown state — solicitations always have a cycle window). solicitation_status is the raw feed status token, exposed separately.

BAA documents

The documents(*) expansion returns the solicitation's BAA PDF inventory. Each document resolves to document_id, filename, cycle_name, s3_key, file_size, extraction_status, n_pages, n_chars.

Filtering

Date filters require YYYY-MM-DD. Single-value (no | OR).

Param What it does
activity Lifecycle: open or closed.
program Program: SBIR or STTR (exact, case-insensitive).
solicitation_number Solicitation number, partial match.
cycle_name DSIP cycle directory name, partial match.
solicitation_status Raw feed status token (exact, case-insensitive).
out_of_cycle Boolean.
year Solicitation year (exact).
start_date_after, start_date_before Cycle start-date range.
end_date_after, end_date_before Cycle end-date range.
search Full-text search over title and solicitation number.

There is no agency filter — DSIP solicitations are DoD only.

Ordering

ordering= allowlist: activity, start_date, end_date, year, modified. Default is newest-modified first.

Shaping

  • List default: solicitation_id, solicitation_number, title, program, cycle_name, year, start_date, end_date, out_of_cycle, activity, solicitation_status, sol_download_url
  • Detail default: every allowed leaf field plus topics(*) and documents(*)

Expandable relations:

  • documents(*) → document_id, filename, cycle_name, s3_key, file_size, extraction_status, n_pages, n_chars
  • topics(*) → topic_id, title, agency, topic_number, close_date, topic_url (a reduced view; the full topic shape lives at /api/sbir/topics/)

Pagination

Both resources use standard page-number pagination:

  • page (default 1)
  • limit (default 25, max 100)

Examples

# Open NIH topics, timeline fields
GET /api/sbir/topics/?activity=open&agency=NIH&shape=topic_id,title,agency,open_date,close_date,activity

# A topic with its parent solicitation
GET /api/sbir/topics/?solicitation_number=SB251-01&shape=topic_id,title,topic_number,solicitation(solicitation_number,program,cycle_name)

# Open STTR solicitation cycles with their BAA documents
GET /api/sbir/solicitations/?activity=open&program=STTR&shape=solicitation_id,title,cycle_name,documents(filename,s3_key,n_pages)

# Solicitation detail with topics
GET /api/sbir/solicitations/{solicitation_id}/?shape=solicitation_id,title,program,topics(topic_id,title,close_date)

Notes:

  • * is only valid inside expansions. Use explicit field lists at the root.
  • Invalid shape fields return HTTP 400 with structured validation errors.
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