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lemlist uses WhiteWhale's API
The most advanced and accurate signal API data.
Programmatic access to custom buying signals, verifiable source data, and account narratives. Built for automation agencies, proprietary AI agents, and custom internal platforms.
700+ sellers already using it, build now.
Query accounts.
Receive context.
✓ Standardized JSON payloads
✓ High-throughput rate limits
✓ Native citation tracking
Event-driven
signal streaming.
Configure webhooks to push payloads to your endpoints the moment a target account triggers a new signal. Perfectly suited for triggering n8n automations, updating databases, or routing alerts.
Engineered for GTM Automation.
Three distinct ways to query the WhiteWhale intelligence engine to power your internal pipelines, CRM routing, and custom workflows.
POST /v1/accounts/batch
Historical Backfill
Upload your existing target account lists to instantly retrieve up to 2 years of historical signal data, verified quotes, and source URLs to prioritize your current pipeline.
WEBHOOKS
Active Monitoring
Maintain a dynamic list of watched accounts. WhiteWhale continuously monitors public filings and earnings calls, pushing real-time JSON payloads to your endpoints the exact moment a buying signal occurs.
GET /v1/farsight
Account Discovery
Reverse-engineer your pipeline. Query the API with a set of defined custom signals (e.g., "Hired VP of RevOps" + "SOC2 Compliance"), and the engine will return net-new accounts currently exhibiting those exact behaviors.
MODEL CONTEXT PROTCOL (MCP)
Trust your agents with factual sources.
Stop letting autonomous agents hallucinate outreach context. WhiteWhale natively supports the Model Context Protocol (MCP).
Expose our intelligence engine directly to Claude Code or your proprietary LLM architectures. Allow your agents to execute native tool calls to query real-world market signals and source documents before they ever draft an email.
// Claude Tool Schema Definition
"name"
"get_account_signals"
"description"
"input_schema"
"type"
"object"
"properties"
"domain"
"type"
"string"
"description"
"required"
"domain"
Example Architectures
Below see how users are using the most accurate signal data into their workflows.
Why & Who Sync
WhiteWhale
Clay
Hubspot
WhiteWhale finds the right account at the right time. Clay finds the buying committee and all the data syncs directly to HubSpot. Your reps log in to fully prepped accounts for outbound everyday the log on.
Campaign Orchestration
WhiteWhale
Claude
Apollo
Maintain a dynamic list of watched accounts. WhiteWhale continuously monitors public filings and earnings calls, pushing real-time JSON payloads to your endpoints the exact moment a buying signal occurs.
Enterprise Routing
WhiteWhale
Salesforce
Salesloft
Bypass static firmographic territory rules. Push active signal payloads into Salesforce via custom Apex triggers to dynamically route high-intent accounts to top Enterprise AEs, immediately triggering context-aware Outreach sequences.
Ready to Integrate?
API and Webhook access is included in the all account plans.
715+ sellers already using it, build now.