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Signals & Intent tools with an MCP server

Tools that try to answer "who is about to buy, and how do you know." The category splits cleanly into two eras: the legacy enterprise intent-data incumbents (6sense, Demandbase, Bombora, HG Insights) sold on annual contracts with no self-serve path, and a newer wave of visitor-ID/job-change/ API-first tools (RB2B, Warmly, Crustdata, TheirStack, PredictLeads) built for solo operators with free tiers and documented MCP servers. 46 of 86 entries in this category are reachable by an agent: 21 through a server the vendor maintains and 25 through one somebody else built. The category is tagged most often with Fetch buyer intent signals. See the full category page.

ToolMCP statusServer URLAuthGate
Crustdata
crustdata.com		Official MCPhttps://install.crustdata.com/mcp +2 moreAPI key
api key (free sandbox key available)		Free to start
Leadfeeder (product line rebranded/merged under Dealfront; dealfront.com redirects to leadfeeder.com)
leadfeeder.com		Official MCPhttps://www.leadfeeder.com/features/mcp-server/ +1 moreOAuth
OAuth - user signs in with their own Leadfeeder account; vendor states "No keys pasted...		Free to start
PredictLeads
predictleads.com		Official MCPhttps://mcp.predictleads.com/API key
api key (same API key/token used for REST API calls, per vendor blog)		Free to start
TheirStack
theirstack.com		Official MCPhttps://api.theirstack.com/mcp/ +1 moreAuth not recorded
unknown - page references a "How does authentication work?" FAQ but the answer wasn't...		Free to start
Warmly (Warmly.ai)
warmly.ai		Official MCPhttps://www.warmly.ai/launches/warmly-mcp-and-api-ar...OAuth or an API key
MCP uses OAuth-based login (no manual key management); the separate REST API...		Free to start
CatchIntent
catchintent.com		Official MCPhttps://engine.catchintent.com/mcp +3 moreOAuth
oauth. The vendor's MCP page states "One-time OAuth 2.1 authorization. Your MCP client...		Paid, self-serve
Factors.ai
factors.ai		Official MCPhttps://mcp.factors.ai/mcp +1 moreAPI key
Personal access token (generated in Settings > AI Features), used via Claude custom...		Paid, self-serve
Keyplay
keyplay.io		Official MCPhttps://api.keyplay.io/mcp +1 moreOAuth or an API key
OAuth for Claude.ai and Claude Desktop, API key for Claude Code, per the vendor's docs		Paid, self-serve
RB2B
rb2b.com		Official MCPhttps://registry.npmjs.org/@rb2b/rb2b-apis-mcpAPI key
api key		Paid, self-serve
Snitcher
snitcher.com		Official MCPhttps://app.snitcher.com/mcp/snitcher +1 moreAuth not recorded
unknown - vendor changelog points to docs.snitcher.com for authentication specifics, not...		Paid, self-serve
Sumble
sumble.com		Official MCPhttps://mcp.sumble.com/ +3 moreAuth not recorded
unknown - the MCP overview page documents one-click install from the Claude and ChatGPT...		Paid, self-serve
6sense
6sense.com		Official MCPhttps://6sense.com/platform/mcp-server/ +1 moreOAuth
OAuth using existing 6sense platform login (no separate API key setup per vendor docs)		Enterprise only
Common Room
commonroom.io		Official MCPhttps://www.commonroom.io/docs/using-common-room/mcp... +1 moreOAuth
oauth (OAuth 2.1, browser-based, tokens scoped to the user's own Common Room permissions)		Enterprise only
Crossbeam
crossbeam.com		Official MCPhttps://mcp.crossbeam.com/mcp +1 moreOAuth
OAuth with Crossbeam login credentials, with a permission consent screen at connect time.		Enterprise only
Demandbase (Demandbase One)
demandbase.com		Official MCPhttps://developer.demandbase.com/docs/mcp +1 moreAuth not recorded
unknown - the account-team-gated support article that likely covers this returned HTTP...		Enterprise only
G2 Buyer Intent
g2.com		Official MCPhttps://mcp.g2.com/mcp +2 moreOAuth
OAuth 2.0 Authorization Code with PKCE. You register an OAuth app in the G2 Developer...		Enterprise only
HG Insights (Phoenix platform)
hginsights.com		Official MCPhttps://learn.microsoft.com/en-us/connectors/hginsig...API key
api key (`x-api-key` header; throttled to 100 calls/60 seconds per connection)		Enterprise only
Similarweb
similarweb.com		Official MCPhttps://mcp.similarweb.com +3 moreOAuth or an API key
CONFLICTING VENDOR STATEMENTS, flagged rather than resolved. Both Similarweb developer...		Enterprise only
UserGems
usergems.com		Official MCPhttps://www.usergems.com/product/mcpOAuth or an API key
unknown - connects inside Claude/ChatGPT per the product page, but the exact auth...		Enterprise only
Actively
actively.ai		Official MCPhttps://app.actively.ai/docs/mcp +2 moreOAuth
oauth. The vendor docs state "MCP access uses OAuth 2.1 with WorkOS." Tools are...		Gate unknown
GTM Signals
andrewcmcguire.com		Official MCPhttps://mcp.gtmsignals.co/mcpAPI key
api key, sent as `Authorization: Bearer gtms_...`. Streamable HTTP, stateless, protocol...		Gate unknown
Trigify (Trigify.io)
trigify.io		Community MCPhttps://github.com/bcharleson/trigify-cliAPI key
api key (from app.trigify.io/settings; via `trigify login --api-key`, env var...		Paid, self-serve
abm.dev
abm.dev		Community MCPhttps://registry.smithery.ai/servers?page=1&pageSize...Auth not recorded
blank		Gate unknown
Dropwatch Research Intel MCP
research.dropwatchhq.com		Community MCPhttps://research.dropwatchhq.com/mcpAuth not recorded
blank		Gate unknown
Fintent Signals MCP
app.fintent.ai		Community MCPhttps://app.fintent.ai/api/v2/mcpAuth not recorded
blank		Gate unknown
IntentLink
intentlink.io		Community MCPhttps://github.com/whalefuntech/intentlink_docsAuth not recorded
blank		Gate unknown
Klarix Intelligence Engine
mcp.klarix.ai		Community MCPhttps://mcp.klarix.ai/mcpAuth not recorded
blank		Gate unknown
Lead Intelligence by Saifs
lead-scoring-mcp.saifs.ai		Community MCPhttps://lead-scoring-mcp.saifs.ai/mcpAuth not recorded
blank		Gate unknown
LinkedIn Job Change MCP by jpeslar1
github.com		Community MCPhttps://github.com/jpeslar1/linkedin-mcp-job-change-...Auth not recorded
blank		Gate unknown
LION Trend Intent MCP
gleaming-cassata-d41682.netlify.app		Community MCPhttps://gleaming-cassata-d41682.netlify.app/api/mcpAuth not recorded
blank		Gate unknown
Mamba GTM Hiring Signal MCP
github.com		Community MCPhttps://github.com/punkpeye/awesome-mcp-serversAuth not recorded
blank		Gate unknown
Mamba GTM Signals Aggregator MCP
github.com		Community MCPhttps://github.com/mambalabsdev/mcp-gtm-signals-aggr...Auth not recorded
blank		Gate unknown
Mamba Job Board Keyword Signal Scanner MCP
github.com		Community MCPhttps://github.com/mambalabsdev/mcp-job-board-keywor...Auth not recorded
blank		Gate unknown
Mamba Public Company Reporting Window MCP
github.com		Community MCPhttps://github.com/mambalabsdev/mcp-public-company-r...Auth not recorded
blank		Gate unknown
Markifact
markifact.com		Community MCPhttps://registry.smithery.ai/servers?q=salesforceAuth not recorded
blank		Gate unknown
Master Metrics
mcp.mastermetrics.com		Community MCPhttps://registry.smithery.ai/servers?q=hubspotAuth not recorded
blank		Gate unknown
NirmahGTM
github.com		Community MCPhttps://github.com/AnjaliPPal/NirmahGTMAuth not recorded
blank		Gate unknown
Opus Growth
opus-growth.com		Community MCPhttps://registry.smithery.ai/servers?page=1&pageSize...Auth not recorded
blank		Gate unknown
Parse Brand Visibility MCP
parse.gl		Community MCPhttps://registry.smithery.ai/servers?page=1&pageSize...Auth not recorded
blank		Gate unknown
Parsley
parsley.id		Community MCPhttps://github.com/peterjduffy/parsley-mcpAuth not recorded
blank		Gate unknown
PrimeRFP SCOUT
scout.primerfp.com		Community MCPhttps://registry.smithery.ai/servers?page=2&pageSize...Auth not recorded
blank		Gate unknown
Red String
redstringapp.xyz		Community MCPhttps://redstringapp.xyzAuth not recorded
blank		Gate unknown
Say Ur Intent MCP
github.com		Community MCPhttps://github.com/stelis-dev/say-ur-intentAuth not recorded
blank		Gate unknown
TeloSignal
telosignal.com		Community MCPhttps://github.com/patrick-creates/telosignal-workfl...Auth not recorded
blank		Gate unknown
Tracklution
tracklution.com		Community MCPhttps://registry.smithery.ai/servers?q=hubspotAuth not recorded
blank		Gate unknown
Yandex Audience MCP
github.com		Community MCPhttps://github.com/A1-x-Tech/mcp-yandex-audienceAuth not recorded
blank		Gate unknown

The other 40 in this category

No server found, or the check could not settle it. Same category, not reachable by an agent today.

ToolMCP statusGateChecked
Centralize
usecentralize.com		MCP unknownFree to start2026-09-02
Vector (vector.co)
vector.co		MCP unknownPaid, self-serve2026-09-02
Koala
getkoala.com		MCP not applicablePaid, self-serve2026-09-02
Albacross
albacross.com		No MCP foundPaid, self-serve2026-09-02
Clearbit Reveal (rebranded: HubSpot Breeze Intelligence)
clearbit.com		No MCP foundPaid, self-serve2026-09-02
Intently (getintently.com)
getintently.com		No MCP foundPaid, self-serve2026-09-02
Live Data Technologies
livedatatechnologies.com		No MCP foundPaid, self-serve2026-09-02
Bombora (Company Surge)
bombora.com		No MCP foundEnterprise only2026-09-02
Champify
champify.io		No MCP foundEnterprise only2026-09-02
AthenaHQ
athenahq.ai		No MCP foundGate unknown2026-09-12
Avina
avina.io		No MCP foundGate unknown2026-09-12
Channel99
channel99.com		No MCP foundGate unknown2026-09-12
ClearBrain
clearbrain.com		No MCP foundGate unknown2026-09-12
CustomerOS
customeros.ai		No MCP foundGate unknown2026-09-12
DemandSphere
demandsphere.com		No MCP foundGate unknown2026-09-12
eBrandValue
ebrandvalue.com		No MCP foundGate unknown2026-09-12
Epicbrief
epicbrief.com		No MCP foundGate unknown2026-09-12
Gauge
withgauge.com		No MCP foundGate unknown2026-09-12
HockeyStack
hockeystack.com		No MCP foundGate unknown2026-09-12
Influ2
influ2.com		No MCP foundGate unknown2026-09-12
Influencer Club
influencers.club		No MCP foundGate unknown2026-09-12
Leadinfo
leadinfo.com		No MCP foundGate unknown2026-09-12
Letterdrop
letterdrop.com		No MCP foundGate unknown2026-09-12
Lift AI
lift-ai.com		No MCP foundGate unknown2026-09-12
LiftIQ
liftiq.com		No MCP foundGate unknown2026-09-12
MiQ
wearemiq.com		No MCP foundGate unknown2026-09-12
Modash
modash.io		No MCP foundGate unknown2026-09-12
NetLine
netline.com		No MCP foundGate unknown2026-09-12
Octane11
octane11.com		No MCP foundGate unknown2026-09-12
Permutive
permutive.com		No MCP foundGate unknown2026-09-12
Propensity
propensity.com		No MCP foundGate unknown2026-09-12
Pubrio
pubrio.com		No MCP foundGate unknown2026-09-12
RollWorks
rollworks.com		No MCP foundGate unknown2026-09-12
SE Ranking
seranking.com		No MCP foundGate unknown2026-09-12
Semrush
semrush.com		No MCP foundGate unknown2026-09-12
Sitefire
sitefire.ai		No MCP foundGate unknown2026-09-12
Syncly
syncly.app		No MCP foundGate unknown2026-09-12
TechniQ ABM
techniqabm.com		No MCP foundGate unknown2026-09-12
Terminus
terminus.com		No MCP foundGate unknown2026-09-12
ZINFI
zinfi.com		No MCP foundGate unknown2026-09-12

What this category is asked for

The jobs most often tagged on the 27 tagged entries in this category.

Fetch buyer intent signalsIdentify an anonymous website visitorEnrich a company from a domainDetect a company's tech stackTrack job changesFind a work email address

Counted 2026-09-27 from directory.json and reconciled against tools_recount.py. Nothing on this page is hand maintained: it is a filter over the same 1,252 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.