Harmonic

Harmonic is a startup discovery and enrichment platform with 29M+ companies and 190M+ people. Search, enrich, and manage deal flow with company data, founder profiles, funding history, investor networks, saved searches, and company/people lists.

Data Model

• Company Watchlists are saved lists of companies. List watchlists first, then get entries to obtain company URNs.
• People Watchlists are saved lists of people. Same pattern — list, get entries, obtain person URNs.
• Company URN format: urn:harmonic:company:{id}. Required for enrichment status, attachments, and similar companies.
• Person URN format: urn:harmonic:person:{id}. Required for person-level operations.
• Investor URN format: urn:harmonic:investor:{id}. Used for investor search and co-investor lookups.
• Saved Searches drive company, people, and investor search results. List saved searches first, then get results.

Gotchas

• Tier restrictions: Watchlists and attachments work on all tiers. Enrich, search, and fetch require higher tiers.
• Rate limit: 600 calls/minute (10/sec). Check X-Ratelimit-Remaining-Second header. Only 200 responses count toward usage.
• Enrichment is async: Use get_enrichment_status to poll; don't assume immediate completion.
• URN vs ID: Some tools use URNs (e.g. company_urn), others use numeric IDs. Match the parameter type to the tool.