Exa Search - Neural search across the web

FullEnrich People Search — contacts by domain, seniority, title, location, skills. $0.05/query. Requires a search filter; limit/offset alone → 400. Prefer seniority over titles; start domain+seniority. Use FullEnrich enums (C-level, VP) — c_suite returns 400. Some domains unindexed.

PDL Person Enrich — career history, emails, phone. Requires one of: `email`, `profile` (LinkedIn URL), or `first_name` + `last_name` + (`company_name` OR `company_domain`). `{ first_name, last_name }` alone returns 400. Prefer `email` when known, then `profile`. No match: HTTP 200, status 404, data null. May include personal PII.