API reference

Funding signals

Written and maintained by The ProspectAPIs team

The funding signals API returns funding rounds, newest announcement first: venture rounds, debt, grants and IPOs, with the amount, the investors and the source of each announcement. Filter by date, round, amount, company, domain, investor or country, and pay only for the records a page returns.

$0.02

per record returned

100

free records a month

100

records a page, at most

GET /v1/funding

Search with any mix of filters. Unknown parameters are a 400, so a misspelled filter never returns an unfiltered, billed page.

Parameter	Meaning
since	Earliest announced date, inclusive. YYYY-MM-DD.
until	Latest announced date, inclusive. YYYY-MM-DD.
round	Comma list of round stages, for example seed,series_a,series_b.
min_amount_usd	Smallest round size in USD.
max_amount_usd	Largest round size in USD.
company	Company name contains this text, case-insensitive.
domain	Exact company domain, for example acme.com.
investor	Exact investor name, case-insensitive.
country	Headquarters country, case-insensitive.
limit	Records per page, 1 to 100. Default 25. Each record returned is billed.
cursor	The previous page's next_cursor, passed back unchanged.

bash

curl -G https://api.prospectapis.com/v1/funding \
  -H "Authorization: Bearer $PROSPECTAPIS_KEY" \
  --data-urlencode "round=series_a,series_b" \
  --data-urlencode "country=United States" \
  --data-urlencode "min_amount_usd=5000000" \
  --data-urlencode "since=2026-09-01"

200 OK

{
  "data": [
    {
      "id": "2b9a6c1e-...",
      "company_name": "Acme Robotics",
      "company_domain": "acme.com",
      "event_class": "venture_round",
      "round_label": "Series A",
      "round_stage": "series_a",
      "amount_usd": 18000000,
      "currency": "USD",
      "announced_at": "2026-09-18",
      "investors": ["Example Ventures", "Sample Capital"],
      "lead_investors": ["Example Ventures"],
      "country": "United States",
      "source_url": "https://...",
      "updated_at": "2026-09-18T14:02:11Z"
    }
  ],
  "next_cursor": "eyJ0Ijoi...",
  "count": 25
}

The example shows a fictional company. Field values are whatever the source states; a field the source does not state is null.

Pagination

Pass next_cursor back as cursor, unchanged, with the same filters. A null next_cursor means there are no more matches. Narrow with filters before you raise limit: every record returned is billed.

bash

cursor=""
while :; do
  page=$(curl -sG https://api.prospectapis.com/v1/funding \
    -H "Authorization: Bearer $PROSPECTAPIS_KEY" \
    --data-urlencode "round=seed" --data-urlencode "cursor=$cursor")
  echo "$page" | jq -c '.data[]'
  cursor=$(echo "$page" | jq -r '.next_cursor // empty')
  [ -z "$cursor" ] && break
done

GET /v1/funding/:id

One record by id, as { "data": { ... } }. $0.02 when found, free records first; a missing id is a free 404.

bash

curl https://api.prospectapis.com/v1/funding/2b9a6c1e-... \
  -H "Authorization: Bearer $PROSPECTAPIS_KEY"

Record fields

Field	Meaning
id	Record id (uuid). Use it with GET /v1/funding/:id.
company_name	The company that raised.
company_domain	Its domain, when known.
event_class	venture_round, debt, grant or ipo.
round_label	The round as announced.
round_stage	Normalised stage, such as seed or series_a.
amount_usd	Amount in USD, when stated.
amount_original	Amount in the announced currency.
currency	The announced currency.
announced_at	Announcement date.
investors	Every investor named.
lead_investors	The lead investors named.
country	Headquarters country.
source_url	Where the round was announced.
attributes	Extra structured detail, when present.
updated_at	When we last changed the record.

Billing

Each request holds the records it may return, using your free records first, then credits. The page is capped to what the hold covers, and the unserved part is refunded when the response closes. When you cannot pay for even one record the API answers 402 with a top_up_url. The X-Credits-Remaining and X-Free-Records-Remaining headers show the balance after each call.

Next steps

Create a free account to get a key; the first 100 records each month are free. The quickstart covers authentication and errors, watchlists push new rounds that match these filters to your webhook, and pricing lists what each call costs. Our guide to sales prospect research explains why a recent round is often the best answer to why now.