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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.

Send us a domain, and we will return the active signals, the specific quoted sources, and the synthesized narrative in real-time.

Standardized JSON payloads

High-throughput rate limits

Native citation tracking

POST /v1/signals/account.upload
{
  "event": "account.upload",
  "event_time": "2025-12-12T12:44:15.842369Z",
  "data": [
    {
      "id": "a35a365e-83f4-4b79-80e0-8c0d5a9b9285",
      "name": "shopify.com",
      "status": "active",
      "scaled_score": 28.01,
      "signals": [
        {
          "trace_name": "M&A",
          "answer": "yes",
          "prob": 0.92,
          "long_answer": "Shopify has been actively acquiring companies, having acquired six different AI companies over the past year, including Vantage Discovery...",
          "top_articles": [
            {
              "source": "https://americanbazaaronline.com/...",
              "article_summary": {
                "quotes": [
                  "'reflexive AI usage' was now a 'baseline expectation at the company' - Tobi Lutke"
                ]
              }
            }
          ]
        },
        {
          "trace_name": "New Prod",
          "answer": "yes",
          "long_answer": "Shopify has recently announced several new products and features, including the Shopify Tax automated filing solution..."
        }
      ],
      "summary": "Shopify Inc. has recently launched a new feature called Shopify Tax for automated sales tax filing, enhancing its service offerings... Despite projecting slowing profit growth, Shopify executives reaffirmed their commitment to growth..."
    }
  ]
}

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.

C
Clay Workflows
A
AI Agents (LLM)
E
Engagement Platforms
S
Custom Systems
C
Clay Workflows
A
AI Agents
E
Engagement Platforms
S
Custom Systems

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"

"Fetch active buying signals and source citations for a specific domain to ground outreach context."

"Fetch active buying

signals"

"input_schema"

"type"

"object"

"properties"

"domain"

"type"

"string"

"description"

"The target company's web domain"

"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.

I need to build a business case…

Why are the results so good?

We already pay for Intent Data. Why do we need this?

Will this require our IT or Engineering team to set up?

My SDRs are already overwhelmed. Will they adopt another tool?

Is the data accurate enough to trust with enterprise accounts?"

I have questions about your company…

How long have you been around? Can we trust you?

Why don’t you have a huge team of employees?

Can I ask a question to ownership directly?

I have questions about your product & features…

What sources do you use for signals?

How long does it take to get up and running?

What if I don’t want my reps logging into another tab?

Do I have to come up with all the Custom Signals myself?

Do you provide clean data for my CRM?

Why don’t you offer contact data, email drafting, or sequencing?

I have questions about your competitors…

How are you different from traditional "Intent Data" (6sense, Bombora)?

Why can't I just use Claude / ChatGPT / Gemini?

Why can’t I just use Clay?

I have other questions…

Is WhiteWhale secure?

Does WhiteWhale have an API?

Can I export my data if we ever leave?

Do you require annual contracts?

What is your refund policy?

I need to build a business case…

Why are the results so good?

We already pay for Intent Data. Why do we need this?

Will this require our IT or Engineering team to set up?

My SDRs are already overwhelmed. Will they adopt another tool?

Is the data accurate enough to trust with enterprise accounts?"

I have questions about your company…

How long have you been around? Can we trust you?

Why don’t you have a huge team of employees?

Can I ask a question to ownership directly?

I have questions about your product & features…

What sources do you use for signals?

How long does it take to get up and running?

What if I don’t want my reps logging into another tab?

Do I have to come up with all the Custom Signals myself?

Do you provide clean data for my CRM?

Why don’t you offer contact data, email drafting, or sequencing?

I have questions about your competitors…

How are you different from traditional "Intent Data" (6sense, Bombora)?

Why can't I just use Claude / ChatGPT / Gemini?

Why can’t I just use Clay?

I have other questions…

Is WhiteWhale secure?

Does WhiteWhale have an API?

Can I export my data if we ever leave?

Do you require annual contracts?

What is your refund policy?

I need to build a business case…

Why are the results so good?

We already pay for Intent Data. Why do we need this?

Will this require our IT or Engineering team to set up?

My SDRs are already overwhelmed. Will they adopt another tool?

Is the data accurate enough to trust with enterprise accounts?"

I need to build a business case…

Why are the results so good?

We already pay for Intent Data. Why do we need this?

Will this require our IT or Engineering team to set up?

My SDRs are already overwhelmed. Will they adopt another tool?

Is the data accurate enough to trust with enterprise accounts?"

I have questions about your company…

How long have you been around? Can we trust you?

Why don’t you have a huge team of employees?

Can I ask a question to ownership directly?

I have questions about your product & features…

What sources do you use for signals?

How long does it take to get up and running?

What if I don’t want my reps logging into another tab?

Do I have to come up with all the Custom Signals myself?

Do you provide clean data for my CRM?

Why don’t you offer contact data, email drafting, or sequencing?

I have questions about your competitors…

How are you different from traditional "Intent Data" (6sense, Bombora)?

Why can't I just use Claude / ChatGPT / Gemini?

Why can’t I just use Clay?

I have other questions…

Is WhiteWhale secure? How do you handle data?

Does WhiteWhale have an API?

Can I export my data if we ever leave?

Do you require annual contracts?

What is your refund policy?

Almost everyone says
"Wait…you can track THAT?"

See your signals for free. No credit card required.

Almost everyone says
"Wait…you can track THAT?"

See your signals for free. No credit card required.