Midu API
Free, read-only JSON for startup funding intelligence: funding rounds with AI scores, SEC Form D and Reg CF filings, early signals, the angel & seed tracker and company timelines. Every record links to its original source. Free plan: 1,000 requests/day and 60/minute per key.
Your API keys
Sign in free with your email to create a key. No password, no card.
Quick start
curl -H "Authorization: Bearer $MIDU_KEY" \ "https://midu.si/api/v1/early?tier=angel_seed&flag=quiet_filing&limit=20" curl -H "Authorization: Bearer $MIDU_KEY" "https://midu.si/api/v1/rounds?from=2026-10-01&source=news&industry=ai" curl -H "Authorization: Bearer $MIDU_KEY" "https://midu.si/api/v1/form-d?tier=angel_seed&exemption=06c&page=2" curl -H "Authorization: Bearer $MIDU_KEY" "https://midu.si/api/v1/companies?q=replicas" curl -H "Authorization: Bearer $MIDU_KEY" "https://midu.si/api/v1/companies/replicas"
Send the key as Authorization: Bearer … or X-API-Key: …. Responses look like:
{
"data": [ { "company": "…", "date": "2026-10-14", "url": "https://www.sec.gov/…", … } ],
"meta": { "total": 127, "page": 1, "limit": 50, "has_more": true },
"attribution": "Data: Midu (midu.si)",
"terms": "https://midu.si/api#terms"
}Endpoints
Base URL https://midu.si/api/v1. All GET, all JSON. Common parameters: limit (1–100, default 50), page (from 1), from/to (YYYY-MM-DD, UTC). Newest first.
| Endpoint | What | Filters |
|---|---|---|
GET /rounds | Funding rounds from news + SEC Form D, merged per company, with AI score, summary and why it matters (Chinese) for news items. | from, to, source=news|form_d, round, industry, region=us|sf|europe|other, min_usd, q |
GET /form-d | SEC Form D filings: related persons, offering and sold amounts, exemptions (506(b), 506(c)…), angel/seed tier. Startup filter on by default. | from, to, tier=angel_seed|larger, industry, state, exemption (e.g. 06b), q, all=true |
GET /form-c | Reg CF offerings (Form C): portal, security, target/max, deadline, financials, signers. | from, to, portal, security, q |
GET /signals | Form D filings from the last 90 days with no news coverage yet. | from, to, industry, q |
GET /early | Angel & seed tracker: Form D ≤$5M, Form C, X announcements, YC, with cross-match flags. | from, to, source=form_d|form_c|x|yc, flag=x_no_filing|quiet_filing, tier, industry, q |
GET /companies?q= | Find company keys by name or domain. | q (required) |
GET /companies/{key} | Company profile: people from filings, timeline of rounds, flags, source links. | — |
GET /usage | Your key's plan, limits and requests used today. | — |
Limits and errors
- Every response carries
X-RateLimit-Limit,X-RateLimit-Remaining,X-RateLimit-Reset(daily, resets 00:00 UTC) andX-RateLimit-Limit-Minute/X-RateLimit-Remaining-Minute. 401missing, invalid or revoked key ·400bad parameter ·404not found ·429limit reached (seeRetry-After).- Need more volume or commercial redistribution rights? See planned plans (Pro 10,000/day, Max 50,000/day, Enterprise from $299/mo) or write to team@midu.si. Everything is free during early access.
Terms of use
- Free for now, rate-limited per key. One person or project per key; don't create keys to get around the limits. Plans and limits may change.
- Attribution required: wherever you show or publish the data, credit "Data: Midu (midu.si)" with a link to midu.si.
- No resale: don't sell, sublicense or bulk-redistribute the data, or use it to build a competing dataset, without written permission.
- Data comes from public sources (SEC EDGAR, news, public posts) and AI extraction; it can be incomplete or wrong. Provided as is, without warranty. Always check the linked source.
- Not investment advice.
- We may revoke keys that abuse the service. Full site terms: midu.si/terms.
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Not investment advice. Midu summarizes public reports and SEC filings for information only. · Free API · Pricing