7 Best Email Finder Tools for AI Agents (2026)

An email finder for AI agents is a tool an agent can call, over MCP or REST, to turn a person it has identified into a work email it can send to. Agent builders, GTM engineers and RevOps teams need one when a model, not a human, runs the lookups. An agent retries, loops and runs overnight. Four things matter: how it signs in, what a miss costs, how fast it can call and whether the price is per seat.

LeadMagic accepts OAuth sign-in only, which rules out a static key in a headless job. FullEnrich allows 60 calls a minute. Prospeo's Starter plan allows 2,000 enrichments a day. This page ranks seven tools on those limits, with list prices checked in September 2026. Each rival has its own page: Icypeas, Anymail Finder, Hunter, FullEnrich, Prospeo and LeadMagic.

TL;DR

"1M records" means 1M work-email lookups that return a result, at list price.

What we evaluated

• Agent access: whether an MCP server exists, how many tools it has and how an agent signs in (OAuth, API key, or both).
• Rate limit: the stated speed, whether it is per plan or per endpoint, and the error code you get when you hit it.
• Cost of a miss: whether a lookup that finds nothing is billed. An agent that retries a miss pays every time.
• Price model and seats: credits, flat fee or per user, and whether many agents can share one account.
• Price at 1M: the public list price of 1M work-email lookups. Where none is published, we say so and do not multiply a rate out.

1. LeadOcean: best for agents that pull by filter, domain or MCP at a flat bill

LeadOcean is a people and company database you query over REST or MCP. It holds 693M people, 366M with an email and 166M with a phone number, plus 67M companies. It is not a name plus domain finder. Enrich takes exactly one of linkedin_url, email, phone or person_id.

The MCP server at https://api.leadocean.io/mcp has 13 tools and signs in with OAuth 2.1, so there is no key to paste. Clients can also register themselves at https://api.leadocean.io/oauth/register. Sizing tools are free: leadocean_count_leads and leadocean_count_companies return a total before an agent spends a record (LeadOcean MCP docs, September 2026).

For a company, list people with GET /v1/companies/{domain}/people, then get the address from GET /v2/people/email/work with the person_id. A work email call returns one current-employer address, or data as null when none exists (LeadOcean docs, September 2026).

curl -s -G "https://api.leadocean.io/v2/people/email/work" \
  --data-urlencode "linkedin_url=https://www.linkedin.com/in/jane-doe" \
  -H "x-api-key: $LEADOCEAN_API_KEY"

Paid plans have a fair-use pace, not credits. Agency is $497 a month and allows 200 requests a second per account, with 5 keys, so several agents each get their own. At that rate 1M calls take under 1.5 hours. Reaching a pace limit slows the key, it does not stop it.

Pros

• Flat $497 a month on Agency at 1M, with no credit meter and no overage invoice.
• OAuth 2.1 on MCP plus an x-api-key header on REST, so both desktop and headless agents work.
• Every email comes with an email_status from 13 values, so the agent filters before it sends.
• Free counts to size a pull, and a POST /v1/people/enrich miss is a free 404.
• 5 keys on Agency, and the same data on every plan, Free included.

Cons

• No name plus domain lookup.
• A /v2/people/email/work miss counts one record. It sits inside the flat price, but it is not free.
• No refund or credit-back for bounced emails.
• No sequencer, dialer or CRM. Bulk CSV export is not on Free.

Best for: agents and engineers that pull emails by filter or by domain at a fixed bill.

Pricing: Free is 1,000 records, one-off, no card. Solo is $97 a month, Agency $497 and Platform $1,997 (LeadOcean pricing, October 2026).

2. Icypeas: best for the lowest public credit price at volume

Icypeas charges 1 credit per email found, and a search that finds nothing costs nothing (Icypeas docs, September 2026). Basic is $19 a month for 1,000 credits. Hypergrowth starts at $499 for 100,000 credits, and its selector lists a 1,000,000-credit tier at $3,992 a month (Icypeas pricing, September 2026).

Single email search, verification and domain search each allow 10 calls a second. Bulk search takes up to 5,000 rows per call at 1 call a second, and it is asynchronous: you submit, then poll (Icypeas docs, September 2026). An agent doing volume should use the bulk route.

API and MCP are on every plan. The hosted MCP server at https://mcp.icypeas.com/mcp lists 21 tools and signs in with your API key (Icypeas MCP guide, September 2026). Credits roll over with no expiry.

Pros

• Lowest public 1M price after LeadOcean, with no charge for misses.
• Credits never expire, even after a cancellation.
• API and MCP on every plan, with a 0.1-credit verifier.
• API-key MCP sign-in works in a headless job.

Cons

• Phone Finder is listed as coming soon, so there are no mobiles.
• The 1,000,000-credit tier sits in a selector that is hidden in the text view of the page. Check it live before you budget.
• Limits are 10 calls a second on single search, and Icypeas says they can change at any time.

Best for: agent builders that want the lowest public credit price for emails at volume.

Pricing: Basic $19, Premium $39, Advanced $89 and Hypergrowth $499 a month. Yearly Basic is $190 (Icypeas pricing, September 2026).

3. Anymail Finder: best for pay-per-find lookups

Anymail Finder is the closest to the classic finder: send a name and a company, get a verified email. A person email costs 1 credit, a decision-maker search 2 and a verification 0.2. Searches that find no verified email are free, and a repeat within 30 days is free (Anymail Finder pricing, September 2026).

Free misses and free repeats suit an agent that retries. The API docs state no rate limits and no daily call cap. Bulk jobs take up to 100,000 rows (Anymail Finder API docs, September 2026). A verified email that bounces can be reported for a credit back after review.

Monthly plans run from $29 for 400 credits to $799 for 100,000. Past that you buy one-time packs, up to 1,000,000 credits for $4,990. The MCP server at https://api.anymailfinder.com/mcp signs in through a browser, or takes an API key, and has five actions (Anymail Finder MCP page, September 2026).

Pros

• Free misses, free repeats and a credit back for bounces after review.
• No stated rate limit or daily cap, so the pace is yours to find out.
• Unlimited team members share one credit pool.

Cons

• The largest monthly plan is 100,000 credits. Bigger volume is a one-time pack or a volume quote.
• The MCP server covers single lookups, not bulk files or webhooks.
• The pricing page shows Canadian dollars to visitors in Canada. Add ?currency=usd for dollars.

Best for: agents that look up people by name and domain and should pay only for verified finds.

Pricing: $29 a month for 400 credits, up to $799 for 100,000. Packs from 5,000 credits for $249. The free offer is 100 credits when you verify a card (Anymail Finder pricing, September 2026).

4. Hunter: best for documented per-endpoint limits and an API-key MCP server

Hunter sells two routes. The all-in-one plans are Free (50 credits a month), Starter at $49 for 2,000, Growth at $149 for 10,000 and Scale at $299 for 25,000. The Data Platform is API and bulk only, and 1,000,000 Search credits cost $6,900, paid once and valid 12 months (Hunter Data Platform, September 2026).

Limits are documented per endpoint, not per plan. Email Finder, Domain Search and the enrichment endpoints allow 15 calls a second and 500 a minute (Hunter API docs, September 2026). At 500 a minute, 1M lookups take about 33 hours.

A found email costs 1 credit and nothing is charged when none is found (Hunter help, September 2026). The official MCP server at https://mcp.hunter.io/mcp takes an API key in a header and is included in all plans (Hunter MCP, September 2026).

Pros

• A published price for 1M lookups ($6,900), cheaper than the all-in-one route.
• Per-endpoint limits are documented, and a repeat lookup in the same billing period is free.
• MCP is included on every plan and works with a key.

Cons

• A rate-limited call returns 403, and 429 means you hit your credit quota. Agent retry code written for 429 will not catch the rate limit.
• On monthly plans, unused credits do not carry over.
• The all-in-one route to 1M is about $19,799, because packs cap per purchase.

Best for: teams that want a finder, a verifier and an app, with a Data Platform for API volume.

Pricing: Starter $49, Growth $149 and Scale $299 a month. Yearly Starter is $34 a month ($408 a year) (Hunter pricing, September 2026).

5. FullEnrich: best for waterfall emails and mobiles in one agent call

FullEnrich queries 25+ data sources per contact and charges only for what it finds. A work email is 1 credit, a personal email 3 and a mobile 10. A not-found result costs 0 (FullEnrich docs, September 2026). It states an average work-email find rate of about 80% (FullEnrich pricing, September 2026). That is the vendor's figure, not ours.

Pro starts at $29 a month for 500 credits, or $26 a month billed yearly. The top monthly tier is 100,000 credits for $3,500 a month, and above that you contact sales. API, MCP, search and bulk CSV are on every plan, including the free trial.

The API allows 60 calls a minute across Enrich, Reverse Email and Search, and a bulk request takes up to 100 contacts. Over the limit it returns 429 with code error.rate.limit (FullEnrich docs, September 2026). The MCP server uses OAuth and covers search, enrich and export (FullEnrich help, September 2026).

Pros

• Waterfall across 25+ sources in one call, with misses and landlines free.
• Bulk requests of 100 contacts, so 60 calls a minute still moves 6,000 contacts.
• MCP can search, enrich and export.

Cons

• No public 1M price. The monthly list stops at 100,000 credits.
• Mobiles cost 10 credits each.
• An agent that sends single calls hits 60 a minute fast, so it must batch.

Best for: agents that need one call to try many providers for emails and mobiles.

Pricing: Pro from $29 a month for 500 credits. The free trial is 50 credits, no card (FullEnrich pricing, September 2026).

6. Prospeo: best for teams that want seats, an app and an agent on the side

Prospeo bills per user. Starter is $49 a month for 2,000 credits, Growth $99 for 5,000 and Pro $249 for 15,000. Billed yearly, Starter is $37 a month (Prospeo pricing, September 2026). Credits from every seat go into one team pool, so an agent can draw on the same pool as your reps.

A verified email is 1 credit and a mobile 10. A search with no result is 0, and a repeat lookup within 90 days is free (Prospeo help, September 2026). Unused credits expire at the end of each cycle.

Enrich limits are per second, minute and day. Starter gets 5, 300 and 2,000. Pro gets 30, 1,800 and 500,000 (Prospeo API docs, September 2026). The hosted MCP server at https://mcp.prospeo.io has 8 tools and signs in with OAuth 2.0 or an API key (Prospeo MCP docs, September 2026).

Pros

• A daily enrich limit of 500,000 on Pro, the highest stated daily ceiling here.
• OAuth or API key on the MCP server.
• Search and enrichment in one app, with a Chrome extension for the team.

Cons

• Reaching 1M means 44 Pro seats plus the largest add-on on monthly billing.
• Credits expire each cycle, and add-ons need a paid plan.
• Starter allows 2,000 enrichments a day, so a 100,000-row list takes 50 days.

Best for: sales teams that work in an app and want an agent on the same credit pool.

Pricing: Free $0 for 100 credits a month. Starter $49, Growth $99 and Pro $249 per user a month (Prospeo pricing, September 2026). The add-on slider ends at 350,000 credits a month for $3,500 (Prospeo help, September 2026).

7. LeadMagic: best for desktop agents that sign in with OAuth and use many tools

LeadMagic is an email finder with a wide tool set. Email Finder costs 1 credit per valid email and a miss is free. A personal email is 2 credits, a mobile 5 and an email validation 0.25 (LeadMagic pricing explained, September 2026).

Email Finder is capped at 600 requests a minute, with a burst of about 10 a second (LeadMagic docs, September 2026). At that cap, 1M lookups take about 28 hours. The search API is zero-credit only on Professional and Ultimate, and on lower plans it bills about 1 credit per person returned.

LeadMagic runs a hosted MCP server, and its stated tool count has changed more than once, so check it live. Sign-in is OAuth only, and static API keys are not accepted (LeadMagic MCP page, September 2026). That suits a desktop agent and is awkward for a server-side job.

Pros

• A free miss on Email Finder, and monthly credits roll over up to 2x the monthly allocation.
• A hosted MCP server that covers search, validation and job change checks.
• Zero-credit search in the app on every paid plan.

Cons

• No free plan. It is pay-as-you-go from $99 a month, with a 14-day money-back guarantee on the first payment.
• No public 1M price. Self-serve plans stop at 100,000 credits.
• OAuth-only MCP sign-in rules out a key in a headless job.

Best for: agent builders who want a large tool set behind one OAuth sign-in.

Pricing: Essential $99, Growth $249, Professional $499 and Ultimate $849 a month. Billed yearly, Essential is $83 a month (LeadMagic pricing, September 2026).

Comparison table

How to choose

• An agent that pulls by filter, by domain or over MCP at a fixed bill: LeadOcean. Flat $497 on Agency, 5 keys, OAuth and key sign-in.
• A server-side agent that must use a static key: Icypeas, Hunter or Anymail Finder. LeadMagic will not work for you.
• Name plus domain lookups and free misses and repeats: Anymail Finder, with no stated rate limit.
• The lowest public price per credit at 1M: Icypeas, at $3,992 a month.
• Per-endpoint limits your retry code can plan around: Hunter. Handle 403 as the rate limit.
• Emails and mobiles from many providers in one call: FullEnrich. Batch 100 contacts per request.
• A sales team with an app and an agent on one credit pool: Prospeo.
• A desktop agent that needs many tools behind one sign-in: LeadMagic.
• A wider shortlist: read what an email finder is, then best email finder tools or the UK list.

Verdict

LeadOcean wins for agents that pull by filter, domain or MCP. It is the only tool here with a flat monthly price at 1M, and its MCP server signs in with OAuth while REST takes a key. It does not take a name plus domain, so it fits agents that build lists rather than clean them. Anymail Finder wins for name plus domain lookups, Icypeas on public credit price and Hunter on documented limits and a key-based MCP server. FullEnrich wins on waterfall, Prospeo for seat-based sales teams and LeadMagic for OAuth desktop agents. Start on the free plan and run the same ten lookups in two tools before you pay.

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