GTM Tech Stack
Best ofGTMUpdated Oct 26, 2026

GTM MCP servers · find, enrich and send from Claude

An MCP server is a small add-on that lets an AI assistant like Claude use another tool for you, so you can find people, get their phone numbers and add them to an email campaign from one chat. Pick FullEnrich for mobile numbers, Apollo for finding people and sending from one login, and Smartlead if you want Claude to…

Notes from GTM teamsWritten by people who run outboundWe use the tools we recommend.

our pick for you

Our pick

Instantly wins if your campaigns already run in Instantly and you want Claude to manage them. Smartlead wins if you want Claude to ask before it sends an email or deletes data. FullEnrich wins if you need mobile numbers and want to pay only when one is found. Apollo wins if you want to find people and email them from one login, even on a free Claude account. AI Ark wins if you build lists and want the lowest price per lookup. Firecrawl wins if you already pay for Firecrawl and want people data on the same credits.

  • A connector is a ready-made link that adds a tool to Claude in a few clicks. You sign in to the tool and approve access.
  • A credit is the unit a tool charges in. On FullEnrich a mobile number is 10 credits, and you pay nothing when it finds nothing.
  • An API key is a long password that lets another app act on your account. Some servers ask for one, and some let you sign in through a browser.
  • AI Ark always puts your API key in the server’s web address, and Smartlead’s Claude Desktop setup does too. Treat that address like a password.
  • Some servers only search a vendor’s help docs. Instantly’s server at developer.instantly.ai answers questions about Instantly and can’t touch your campaigns.
  • If a send request times out, the first try may have worked. A retry can send the same emails twice, so turn on approval for sends.
  • FullEnrich’s Claude connector needs a paid Claude plan, Pro or Max. Apollo’s works on any Claude plan, including the free one.
  • The math: on October 26, 2026 prices, 50 people and their mobiles on FullEnrich cost up to 512.5 credits, about $28 of Pro’s $55 a month billed monthly.

Ranked picks

  1. #1
    Instantlytop pick

    Best for: Teams whose email campaigns already run in Instantly.

    See vendor pricingSequencers
    • It works with Claude, Cursor and other assistants that can add an MCP server.
    • Instantly recommends sending the API key in a header, a hidden part of each request, so it stays out of server logs.
    Go to the websiteRead our review
  2. #2
    Smartlead

    Best for: Teams that want Claude to ask before it sends an email or deletes data.

    See vendor pricingSequencers
    • You connect by signing in, with no API key to paste.
    • Claude asks you to confirm before it sends an email or deletes data.
    • You can cut access by deleting its API key in Smartlead’s settings.
    Go to the websiteRead our review
  3. #3
    FullEnrich

    Best for: Teams that need mobile numbers and want to pay only when one is found.

    Free trial: 50 credits.Enrichment
    • A search preview shows the first 10 results and the total count for free.
    • A mobile is 10 credits, and a miss costs nothing.
    Go to the websiteRead our review
  4. #4
    Apollo

    Best for: Teams that want to find people and add them to email sequences, emails sent in steps over days, from one login.

    See vendor pricingList build
    • It works on any Claude plan, including the free one.
    • You can set each action to ask for approval first.
    Go to the websiteRead our review
  5. #5
    AI ARK

    Best for: Teams that build lists and want the lowest credit price.

    Free: 100 credits a month.List build
    • $49 a month billed monthly buys 5,000 credits.
    • A mobile costs 5 credits when found.
    Go to the websiteRead our review
  6. #6
    Firecrawl

    Best for: Teams that already pay for Firecrawl and want people data on the same credits.

    From $16 a month yearly.Search APIs
    • Apollo people search through Firecrawl costs 0 credits.
    • Web research and people data come out of one pool of credits.
    Go to the websiteRead our review

Compare

ToolPrice bandBest forDealbreaker
#1 InstantlySee vendor pricingTeams whose email campaigns already run in Instantly.Claude can use every Instantly API action, so it can pause live campaigns, reply to…
#2 SmartleadSee vendor pricingTeams that want Claude to ask before it sends an email or deletes data.The Claude Desktop setup puts your API key in the server’s web address.
#3 FullEnrichFree trial: 50 credits.Teams that need mobile numbers and want to pay only when one is found.Its Claude connector needs Claude Pro or Max.
#4 ApolloSee vendor pricingTeams that want to find people and add them to email sequences, emails sent in steps over days, from one login.You need a work email to sign in, and you must turn off model training in Claude first.
#5 AI ARKFree: 100 credits a month.Teams that build lists and want the lowest credit price.Your API key goes in the server’s web address every time.
#6 FirecrawlFrom $16 a month yearly.Teams that already pay for Firecrawl and want people data on the same credits.A FullEnrich mobile is 175 Firecrawl credits, against 10 FullEnrich credits direct.
MethodHow we scored these tools▾

Each tool’s own setup docs and help articles, checked October 26, 2026, show what each server needs and what it can do. Prices are from each tool’s own pages on the same date. Firecrawl’s people data prices are from Firecrawl’s own price list, dated October 18, 2026.

Who it's for

buy if

  • Use this page if you want Claude or another AI assistant to find leads, get contact details or work your email campaigns.
  • Use this page if you want to know what each step costs before you let an assistant run it.

skip if

  • Skip this page if you want a full API guide. The Instantly API guide covers that.

The short answer

Pick Instantly if your email campaigns already run in Instantly and you want Claude or Cursor to manage them.

Pick Smartlead if you want Claude to ask before it sends an email or deletes data. You connect by signing in to an active Smartlead account.

Pick FullEnrich if you need mobile numbers. Search previews are free, a mobile is 10 credits, and Pro is $55 a month billed monthly for 1,000 credits.

Pick Apollo if you want to find people and add them to sequences from one login. Its connector works on any Claude plan.

Pick AI Ark if you build lists and want the lowest credit price, at $49 a month billed monthly for 5,000 credits.

Pick Firecrawl if you already pay for Firecrawl and want Apollo and FullEnrich data on the same credits.

What one job costs · 50 sales leaders with mobile numbers

The math: on October 26, 2026 prices, to find 50 VPs of Sales, get their mobile numbers and add them to an email campaign:

  • FullEnrich: the search preview is free. Exporting 50 people is 50 × 0.25 = 12.5 credits. Mobiles are up to 50 × 10 = 500 credits, charged only when found. That is up to 512.5 credits, about $28 at Pro’s $0.055 a credit, on the $55 a month plan billed monthly.
  • Firecrawl: Apollo people search is 0 credits. FullEnrich mobiles are 50 × 175 = 8,750 credits. On Standard, $83 a month billed yearly for 100,000 credits, that share is worth about $7.26 if you use the rest of the credits. This uses Firecrawl’s own October 18 price list.
  • Sending: the email tool is a fixed monthly cost. Smartlead Base is $39 a month billed monthly. The finding and mobiles are the part that changes with each job.

Some servers only answer questions about the tool

Instantly, FullEnrich and Smartlead each run a docs server that searches their help pages. It can answer “how do I” questions. It can’t read or change your campaigns.

When you set up a server, check that it connects to your account. Instantly’s account server lives at mcp.instantly.ai.

Where your API key goes

Instantly recommends sending the API key in a header so it stays out of server logs. Its docs say to put the API key in the web address only if your app can’t set headers.

AI Ark’s setup always puts the API key in the server’s web address. Smartlead’s Claude Desktop setup does the same.

A web address with an API key in it can end up in config files, screenshots and logs. Keep those files private, and make a new API key if one leaks.

Turn on approval before an assistant sends

Nripanka Das (@DasNripanka) wrote on X on August 17, 2026: “The risky edge case is Claude retrying the Smartlead MCP call after a timeout: the first launch may have succeeded even if the response was lost.”

A retry can send the same campaign twice. Smartlead’s connector asks you to confirm before it sends or deletes. Apollo lets you set each action to Approval required, and it recommends that for any action that spends credits.

Common questions

Does Instantly have an MCP server?▾

Yes. Instantly’s MCP server needs an API v2 key, which you make under Settings, Integrations, API Keys.

Can Claude send cold emails through Smartlead?▾

Yes, after you confirm. Smartlead’s Claude connector asks before it sends an email or deletes data.

Which sales tools work with Claude?▾

Instantly, Smartlead, FullEnrich, Apollo, AI Ark and Firecrawl all have MCP servers. FullEnrich’s Claude connector needs Claude Pro or Max, and Apollo’s works on any Claude plan.

Do MCP actions use credits?▾

Yes, when the action finds or exports data. FullEnrich previews searches for free and charges 0.25 credit per exported contact. Apollo says some of its actions spend credits.

Is it safe to put an API key in an MCP web address?▾

It works, but the address can end up in logs and screenshots. Use a header or a browser sign-in when the tool allows it, and treat any address with an API key in it like a password.

Sources15 references▾

what to do next

What to do next

Pick the one job you want Claude to do first: find people, get mobiles or send. For mobiles, connect FullEnrich from a Claude Pro or Max account and use its 50 free credits. For search and sequences on any Claude plan, connect Apollo. To send with a confirm step, connect Smartlead. If your campaigns already run in Instantly, make an API v2 key and add its server. For lists, try AI Ark, and for people data on Firecrawl credits, use Firecrawl. Run it first on a small test list before you let it touch live campaigns. Try FullEnrich Next · Instantly API explains Instantly’s API keys · Smartlead pricing covers each Smartlead plan.

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