B2B contact and company data providers - the databases, waterfall aggregators, and lookup APIs that fill in names, emails, phones, and firmographics before outreach starts. The split that matters most here is access: self-serve API vs. enterprise-sales-gated. 33 of 38 entries in this category are reachable by an agent: 31 through a server the vendor maintains and 2 through one somebody else built. The category is tagged most often with Find a work email address. See the full category page.
| Tool | MCP status | Server URL | Auth | Gate |
|---|---|---|---|---|
| Anymail Finder anymailfinder.com | Official MCP | https://api.anymailfinder.com/mcp +1 more | OAuth or an API key Browser-based OAuth-style sign-in and approval for Claude, ChatGPT and Cursor, with an... | Free to start |
| Diffbot diffbot.com | Official MCP | https://github.com/diffbot/diffbot-mcp | API key api key (free Diffbot token required to use the MCP tools) | Free to start |
| Enrow enrow.io | Official MCP | https://github.com/EnrowAPI/enrow-mcp +1 more | API key api key. ENROW_API_KEY env var for stdio, or an Authorization Bearer / x-enrow-api-key... | Free to start |
| Exa exa.ai | Official MCP | https://github.com/exa-labs/exa-mcp-server +1 more | API key api key (issued via dashboard.exa.ai) | Free to start |
| FullEnrich fullenrich.com | Official MCP | https://mcp.fullenrich.com/mcp +1 more | OAuth oauth (browser sign-in to FullEnrich account; no manual API key needed) | Free to start |
| Hunter.io hunter.io | Official MCP | https://hunter.io/api-documentation#mcp | API key api key (HUNTER_API_KEY) | Free to start |
| LeadMagic leadmagic.io | Official MCP | https://github.com/LeadMagic/leadmagic-mcp +1 more | OAuth or an API key api key for local/self-hosted install (LEADMAGIC_API_KEY env var); OAuth Bearer token... | Free to start |
| Lusha lusha.com | Official MCP | https://github.com/lusha-oss/lusha-public-api-mcp +2 more | API key api key (LUSHA_API_KEY) | Free to start |
| Prospeo prospeo.io | Official MCP | https://github.com/prospeo-v2/prospeo-mcp-server | OAuth or an API key OAuth 2.0 for the hosted server (auto-handled by Claude.ai/Desktop via the MCP... | Free to start |
| TheirStack theirstack.com | Official MCP | https://theirstack.com/en/docs/mcp +2 more | API key api key (same credentials as the REST API) | Free to start |
| Warmly warmly.ai | Official MCP | https://www.warmly.ai/launches/warmly-mcp-and-api-ar... | OAuth or an API key OAuth for the MCP connector; API key for the REST API | Free to start |
| ZoomInfo zoominfo.com | Official MCP | https://mcp.zoominfo.com/mcp +2 more | OAuth OAuth for user-level access, or client credentials for service accounts; no API keys... | Free to start |
| Apollo.io apollo.io | Official MCP | https://github.com/apolloio/apollo-mcp-plugin | OAuth OAuth (Apollo.io sign-in/authorization flow in the client) | Paid, self-serve |
| Bright Data brightdata.com | Official MCP | https://github.com/brightdata/brightdata-mcp | API key api key (Bright Data API token) | Paid, self-serve |
| Clay clay.com | Official MCP | https://www.clay.com/mcp +1 more | API key Session cookie - the same token used to log into app.clay.com in-browser, which grants... | Paid, self-serve |
| Coresignal coresignal.com | Official MCP | https://coresignal.com/mcp-server/ | OAuth OAuth 2.1 - per docs, the data key is fetched live with every request and never stored,... | Paid, self-serve |
| CUFinder cufinder.io | Official MCP | https://mcp.cufinder.io/mcp +1 more | API key api key from the CUFinder dashboard under Account Settings then API Dashboard. Streamable... | Paid, self-serve |
| Dropcontact dropcontact.com | Official MCP | https://www.dropcontact.com/mcp-dropcontact | OAuth or an API key Hosted server at mcp.dropcontact.com/mcp/, supporting OAuth (recommended, browser-based)... | Paid, self-serve |
| Fiber AI fiber.ai | Official MCP | https://mcp.fiber.ai/mcp/v3 +2 more | OAuth or an API key OAuth via Clerk on the v3 endpoint; x-api-key header on the v2 and legacy endpoints. | Paid, self-serve |
| Lead411 lead411.com | Official MCP | https://mcp.lead411.com/mcp +3 more | API key api key via X-API-KEY header. TRANSPORT IS DISPUTED: the official registry record says... | Paid, self-serve |
| Ocean.io ocean.io | Official MCP | https://app.ocean.io/docs/getting-started/mcp +1 more | API key api key (api-token passed as a URL parameter to the hosted MCP endpoint) | Paid, self-serve |
| RocketReach rocketreach.co | Official MCP | https://rocketreach.co/resources/products/mcp/ +1 more | OAuth OAuth 2.1, browser-based; ties to your existing RocketReach account and shares its credit... | Paid, self-serve |
| Snov.io snov.io | Official MCP | https://mcp.snov.io/mcp +1 more | OAuth OAuth - user reviews and approves the connection through their Snov.io account; no raw... | Paid, self-serve |
| The Swarm theswarm.com | Official MCP | https://bee.theswarm.com/mcp +1 more | OAuth or an API key OAuth via personal Swarm login (native Claude and ChatGPT app connectors) or team API key... | Paid, self-serve |
| Vainu vainu.com | Official MCP | https://mcp.vainu.ai/mcp +2 more | OAuth OAuth 2.0 with PKCE, scoped to existing Vainu permissions, but NOT enabled by default.... | Paid, self-serve |
| Versium REACH versium.com | Official MCP | https://app.versium.com/mcp/reach +2 more | OAuth OAuth, and the client must support dynamic client registration. | Paid, self-serve |
| Wiza wiza.co | Official MCP | https://mcp.wiza.co/mcp +2 more | OAuth or an API key OAuth 2.1 with PKCE for clients that support it, otherwise a static bearer token in the... | Paid, self-serve |
| Seamless.AI seamless.ai | Official MCP | https://docs.seamless.ai/mcp-docs +1 more | OAuth or an API key OAuth 2.1 or API key; docs state "MCP access must be enabled on your account" - i.e.... | Enterprise only |
| Surfe surfe.com | Official MCP | https://mcp.eu.surfe.com/mcp +1 more | API key Surfe API key, with a browser sign-in flow that exchanges the key for a managed token so... | Enterprise only |
| Crustdata crustdata.com | Official MCP | https://crustdata.com/ | Auth not recorded unknown | Gate unknown |
| Explorium explorium.ai | Official MCP | https://www.explorium.ai/mcp/ +1 more | API key api key | Gate unknown |
| People Data Labs peopledatalabs.com | Community MCP | https://github.com/phxdev1/peopledatalabs-mcp | API key api key (PDL_API_KEY environment variable) | Free to start |
| UpLead uplead.com | Community MCP | https://zapier.com/mcp/uplead +1 more | OAuth or an API key Handled through the Zapier/Pipedream platform's own connector auth (API key entered into... | Paid, self-serve |
No server found, or the check could not settle it. Same category, not reachable by an agent today.
| Tool | MCP status | Gate | Checked |
|---|---|---|---|
| BetterContact bettercontact.rocks | No MCP found | Free to start | 2026-08-24 |
| Datagma datagma.com | No MCP found | Free to start | 2026-08-24 |
| Findymail findymail.com | No MCP found | Free to start | 2026-08-24 |
| Clearbit (now HubSpot Breeze Intelligence) hubspot.com | No MCP found | Enterprise only | 2026-08-24 |
| Cognism cognism.com | No MCP found | Enterprise only | 2026-08-24 |
The jobs most often tagged on the 38 tagged entries in this category.
Counted 2026-08-25 from directory.json and reconciled against tools_recount.py. Nothing on this page is hand maintained: it is a filter over the same 293 entries the rest of the site is built from. Ordered by the published rule: official MCP first, then community, then unknown, then n/a, then none-found; within each band gate order is free, paid, enterprise-leaning, enterprise-only, unknown; then alphabetical by name. Computed, never curated, never purchasable.