[Hunter] Find all email addresses associated with a company domain.

Best for: prospecting a whole company, building outreach lists, discovering team structure at a target account. Costs 1 Hunter request (monthly quota). Does NOT consume per-email credits. Returns emails with confidence scores, names, job titles, and LinkedIn URLs. Use hunter_count_emails first to gauge data availability for free.

[Hunter] Find the most likely work email address for a specific person.

Best for: finding a contact email when you know the person's name and employer. Costs 1 Hunter finder credit. Returns the guessed email with a confidence score (0–100), sources, and verification status. A score above 70 is generally reliable for outreach.

[Hunter] Verify the deliverability of an email address.

Best for: cleaning a lead list before sending outreach, validating emails found by other tools, reducing bounce rates. Costs 1 Hunter verification credit. Returns status: 'valid' | 'invalid' | 'accept_all' | 'webmail' | 'unknown', plus SMTP and MX record check details. Only send to 'valid' addresses.

[Hunter] Count how many email addresses Hunter has indexed for a domain.

Best for: quickly checking data availability before spending credits on a full domain search. Run this first when exploring a new target company. FREE — does not consume any credits or quota. Returns total email count broken down by department and seniority.

[Hunter] Return Hunter.io account info including remaining credits.

Best for: checking how many finder and verifier credits remain before running a large enrichment batch. FREE — does not consume any credits. Returns plan name, monthly quota, requests used, and credits remaining.

[Apollo] Enrich a person's full B2B profile using only their email address.

Best for: the most common lead-gen workflow — you have an email (e.g. from Hunter) and want the full profile: job title, seniority, LinkedIn, company, and phone. Fastest and most reliable Apollo enrichment path. Costs 1 Apollo credit. Works on free Apollo plan.

[Apollo] Enrich a person's B2B profile by name and at least one identifier.

Best for: enriching a contact when you have name + employer but no email yet (consider using hunter_find_email first — it may be cheaper). Costs 1 Apollo credit normally; 8 credits with reveal_phone_number=True. Provide at least one of: domain, organization_name, email, or linkedin_url.

[Apollo] Enrich up to 10 people in a single API call.

Best for: enriching a batch of contacts at once — faster than looping over enrich_person and uses the same total credits (1 per matched person). Works on free Apollo plan.

[Apollo] Enrich a company's full firmographic profile by domain.

Best for: company intelligence that Hunter doesn't provide — headcount, revenue range, funding stage, investors, tech stack, industry, and social links. Use this alongside Hunter email tools for a complete company + contacts picture. Costs 1 Apollo credit. Works on free Apollo plan. Returns: legal name, employee count, revenue range, industry, founding year, funding stage and total raised, tech stack, LinkedIn, Twitter, website. Examples: stripe.com, openai.com, notion.so, figma.com

[Apollo] Search Apollo's people database by title, location, or seniority.

REQUIRES Apollo Basic plan ($49/mo) or higher — returns HTTP 403 on the free tier. Does NOT consume credits. Does NOT return email addresses. To get emails for results, use hunter_find_email or enrich_person (1 credit each).

[Apollo] Search Apollo's company database by keyword, location, or headcount.

REQUIRES Apollo Basic plan ($49/mo) or higher — returns HTTP 403 on the free tier. Does NOT consume credits. Does NOT return email addresses. To get contacts from results, use hunter_find_emails_by_domain (Hunter) or enrich_company (Apollo) for firmographic details (1 credit each).