LEAD QUALITY SCORING API

Filter Low-Quality and Fake Leads. Get a Score and Recommended Action.

CRM-agnostic lead scoring API. Deterministic lead quality scoring for sales operations and marketing operations: validate inbound leads, filter low-quality and fake leads, get a score and recommended action—no CRM lock-in.

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The cost of unprioritized inbound leads

When inbound leads aren’t scored, your team wastes time on low-quality and fake leads. Agents call leads with no phone, fake emails, or no real intent—while high-intent prospects wait. The result: higher cost per conversion and lower productivity for sales operations and marketing operations.

  • Wasted calls — Time and payroll spent on leads that never convert.
  • Low efficiency — No way to tell which leads deserve a call first.
  • Higher cost per sale — More calls per conversion because quality isn’t filtered at the gate.

Lead validation before your workflow

LeadFlags is a deterministic lead scoring API. Apply lead validation to every inbound lead: get a score, quality level, flags, and recommended action. Filter at the gate—before your CRM or call queue—so only qualified leads get agent time.

  • Reduce wasted calls — Route only leads that meet your bar.
  • Prioritize best leads — Your team responds to high-intent first.
  • Save agent time — Less manual triage, fewer low-value contacts.
  • Deterministic scoring — Same input, same result. Routing stays predictable.

How it works

CRM-agnostic lead scoring API. Three steps. You decide how to use the score and recommended action.

  1. Send lead data

    Send name, email, phone, message, source (and optional country) as JSON. No fixed schema.

  2. Get score + flags

    Receive a score (0–100), quality level (high / medium / low), and flags that explain each deduction.

  3. Act with confidence

    Use the recommended action (call immediately, review first, or do not call) to route leads and focus your team on what converts.

What you get

Lead validation for inbound leads: fewer wasted calls, predictable routing, and a deterministic scoring model your sales operations and marketing operations can rely on.

  • Lower cost per conversion — Fewer calls per sale by filtering at the gate.
  • Faster response to best leads — Score and route before leads hit your CRM; high-quality leads get attention first.
  • Less wasted effort — Agents spend less time on low-quality leads, fake leads, and manual triage.
  • Explainable decisions — Every score comes with flags (e.g. missing phone, disposable email). You can justify routing to your team and clients.
  • CRM-agnostic — Use LeadFlags in front of any CRM or workflow. You decide where the score and recommended action go.

Who uses LeadFlags

Sales operations and marketing operations that need consistent lead quality scoring at scale.

  • Marketing agencies — Score inbound leads before passing to clients or internal SDRs. Same criteria for every campaign; fewer wasted callbacks.
  • Call centers — Filter leads at the gate so agents call only qualified contacts. Less time on bad numbers and fake data; higher productivity per agent.
  • Lead sellers and buyers — Apply one scoring standard to lead lists. Buyers get a clear quality signal; sellers demonstrate quality in a consistent way.

Deterministic scoring

Deterministic scoring: same input, same result. Running a lead pipeline at scale requires consistent rules so your sales operations and marketing operations know what to expect. LeadFlags uses predefined quality criteria—no drift, no surprises.

  • Predictable scoring — Rules are clear and repeatable. Your operations and systems know what to expect.
  • Same lead, same result — Your integrations and routing logic get consistent inputs every day.
  • Built for volume — Score thousands of leads reliably every day. That’s what LeadFlags is for.

What we stand for

LeadFlags is not intelligence. It is reliability.

Same input, same result. Built for operations.

Why score before your CRM

Filter low-quality and fake leads at the gate so you don’t pay to store or process noise—and so your team doesn’t waste time on them. CRM-agnostic lead validation.

  • Early filtering — Score leads as they arrive (forms, webhooks, imports). Send only qualified leads into your CRM or call queue. Less storage, less manual triage, lower cost.
  • No dependency on a CRM — Use LeadFlags in front of HubSpot, Salesforce, or any other system. You decide where the score goes.
  • Explainable logic — Every score comes with flags (e.g. missing phone, disposable email). You can justify routing decisions to your team and clients.

What teams say

"We use LeadFlags for lead validation—filter inbound leads before they hit our CRM. Deterministic scoring, same criteria every time. Our agents spend more time on calls that convert and less on low-quality leads."

— Sales team lead, B2B SaaS

Pricing

Plans for teams with real volume. Pay for usage; get predictable scoring and full control. From small teams to high-volume operations.

  • Starter

    Small teams with regular lead flow

    39 € / month

    • Up to 1,000 leads / month
    • Full scoring and flags—no hidden limits
    • Email support when you need it
    • Production-ready from day one
    Subscribe
  • Growth

    Teams running daily inbound or outbound

    99 € / month

    • Up to 10,000 leads / month
    • Priority processing when volume spikes
    • Fast support so you stay unblocked
    • Early access to new scoring logic
    Subscribe
  • Scale

    High volume: agencies, call centers, lead sellers

    249 € / month

    • Up to 50,000 leads / month
    • Higher rate limits for peak load
    • Priority support for routing and integration
    • Basic SLA for availability
    Subscribe
  • Enterprise

    Custom volume, security, and thresholds

    100,000+ leads

    • Dedicated SLA and support
    • IP allowlist for security and compliance
    • Custom score thresholds to match your process
    • Custom billing and terms
    Contact us

CRM-agnostic. No lock-in.

LeadFlags is a CRM-agnostic lead quality scoring API. We don’t sell CRM or marketing automation. Deterministic scoring for sales operations and marketing operations: we return a score, quality level, flags, and recommended action. You decide how to use it.

Use it in front of any CRM, call center, or pipeline. Same input, same result. For teams that need to score thousands of inbound leads a month reliably—deterministic scoring, no drift—LeadFlags provides a stable contract your operations can rely on.

Lead scoring API

One endpoint. Deterministic scoring: same input, same result—so your sales and marketing operations integrations stay predictable. Integrate in under 30 minutes.

POST /api/score-lead

Accepts any JSON object. All fields are optional. Unknown fields are ignored or stored as metadata.

Optional geographic fields (country or geo) are used only for consistency checks (e.g. phone prefix vs country), never for profiling or value assumptions.

Example request

curl -X POST "https://leadflags.com/api/score-lead/" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"name":"Pieter van der Berg","email":"pieter@bedrijf.nl","phone":"+31612345678","message":"Interested in enterprise plan","source":"website","country":"NL"}'

Response

{
  "score": 100,
  "quality": "high",
  "flags": [],
  "recommended_action": "call_immediately"
}

Quality: high (≥ mid, default 80), medium (≥ low and < mid, default 50), low (< low). Custom thresholds: ?mid=70&low=40. Flags explain deductions (e.g. missing_phone, disposable_email, missing_country, country_phone_mismatch).

See it in action

Send a sample inbound lead and get a real score, quality level, flags, and recommended action. No sign-up required.

Fill in at least one field and click Get score to see the result.

Score —
Quality —
Recommended action —
Flags

    Frequently asked questions

    What does the score mean?

    The score is 0–100. Higher means the lead meets more of our quality criteria (valid contact data, real-looking name, non-disposable email, etc.). We also return a quality level (high / medium / low) and a recommended action (e.g. call immediately, review first, do not call). You use these to route and prioritize.

    What is a flag?

    A flag is a short reason why points were deducted (e.g. missing phone, disposable email, invalid format). Flags make the score explainable: you see why a lead scored lower and can justify routing decisions to your team or clients.

    Why not just use AI?

    Deterministic scoring: same input, same result. Running a lead pipeline at scale needs consistency so routing and integrations don’t change from day to day. LeadFlags uses fixed rules. No drift, no prompts—built for sales operations and marketing operations.

    Do I need to change my CRM?

    No. LeadFlags is a CRM-agnostic lead scoring API. You call it before your CRM or call queue for lead validation. Send lead data, get a score, flags, and recommended action, then decide where the lead goes. Use it with any CRM or workflow.

    Request demo

    Tell us about your use case. We’ll get back to you at the email you provide.