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ProspectAPIs

Worked examples
real calls, real responses, real prices

ProspectAPIs is a funding data, email verification and research API, and this page shows it working: each example is a call our team ran against the live API on the date shown, with public or made-up inputs. Responses are trimmed, never edited, and each price is the list rate.

ProspectAPIs is a funding data, email verification and research API, billed per result from a prepaid balance. New to funding signals? Our guide to prospecting with funding signals covers the workflow these calls fit into. Every account starts with $1 free, which covers each example here several times over. Per our own runs on October 25, 2026, the three calls below returned 3 funding records, 2 verification results and 1 cited brief built from 21 sources, for $0.214 in total at list prices.

Find US companies that just raised a seed or Series A

A sales team wants companies with fresh budget, while the round is still news.

Ran on October 25, 2026, 11:11 PM PT

The call

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.prospectapis.com/v1/funding?since=2026-10-18&round=seed,series_a&country=US&limit=3"

What came back (trimmed)

{
  "count": 3,
  "data": [
    { "company_name": "Slingshot Insurance", "company_domain": "slingshotinsurance.com",
      "amount_usd": 27000000, "investors": ["Rally Ventures", "Skyward Group"],
      "source_url": "https://www.thesaasnews.com/news/slingshot-insurance-raises-27m-seed" },
    { "company_name": "Jooba", "company_domain": "jooba.com",
      "amount_usd": 4000000, "investors": [],
      "source_url": "https://www.thesaasnews.com/news/jooba-raises-4m-seed" },
    { "company_name": "Mach9", "company_domain": "mach9.ai",
      "round_label": "Series A", "amount_usd": 34000000, "announced_at": "2026-10-21",
      "lead_investors": ["First Round Capital", "Bessemer Venture Partners"],
      "source_url": "https://www.prnewswire.com/news-releases/mach9-raises-34m-series-a-to-bring-civil-engineering-into-the-ai-era-302915153.html" }
  ],
  "next_cursor": "eyJhIjoiMjAy..."
}

3 records returned, each with the company domain and the announcement it came from. The cursor pages to the next 3.

Cost: 3 records at $0.02 each: $0.06. Full details in the funding API reference.

Check addresses before a send

Before a cold email goes out, drop the addresses that will bounce and see which domains accept anything.

Ran on October 25, 2026, 11:12 PM PT

The call

curl -X POST https://api.prospectapis.com/v1/email/verify \
  -H "Authorization: Bearer YOUR_API_KEY" -H "Content-Type: application/json" \
  -d '{"emails": ["jane.doe@gmial.com", "no.such.person.1026@prospectapis.com"]}'

What came back (trimmed)

{
  "count": 2,
  "charged_count": 1,
  "data": [
    { "email": "jane.doe@gmial.com", "status": "invalid", "reason": "disposable_domain",
      "score": 5, "recommendation": "do_not_send", "did_you_mean": "gmail.com", "charged": true },
    { "email": "no.such.person.1026@prospectapis.com", "status": "catch-all",
      "reason": "server_accepts_all", "score": 70, "recommendation": "send_with_caution", "charged": false }
  ]
}

Both addresses are made up for this demo. The first is a typo of a common mail domain, flagged with the likely fix; the second sits on a domain that accepts any address, so it cannot be confirmed and is not charged.

Cost: 1 charged result at $0.004; the catch-all result is free. Full details in the email verification API reference.

Read up on a company before the first call

One of the companies from the funding search above is worth a call. Before it, the rep wants the basics with a source for each.

Ran on October 25, 2026, 11:11 PM PT

The call

curl -X POST https://api.prospectapis.com/v1/research \
  -H "Authorization: Bearer YOUR_API_KEY" -H "Content-Type: application/json" \
  -d '{"domain": "mach9.ai"}'
# then poll: GET https://api.prospectapis.com/v1/research/{research_id}

What came back (trimmed)

{
  "status": "completed",
  "result": {
    "company": {
      "name": { "value": "Mach9", "sources": [{ "url": "https://mach9.ai/", "kind": "site" }] },
      "hq": { "value": "San Francisco, CA", "sources": [{ "url": "https://mach9.ai/about", "kind": "site" }] },
      "founded": { "value": "2021", "sources": [{ "url": "https://mach9.ai/about", "kind": "site" }] }
    },
    "funding": {
      "last_round_at": "2026-10-21", "total_raised_usd": 34000000,
      "rounds": [{ "round": "Series A", "amount_usd": 34000000,
        "lead_investors": ["First Round Capital", "Bessemer Venture Partners"] }]
    },
    "sources_considered": 21
  }
}

The brief came back in 59 seconds with every field tied to the pages it was read from. It also covers people, news, competitors, risks and traction, cut here for length.

Cost: 1 completed brief: $0.15. Full details in the research API reference.

Using ProspectAPIs on a real workflow? Tell us at emma@prospectapis.com and we may feature it.

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