Validate email, phone, company, and postcode in one API call. Get an AI-generated lead quality score (0–100), grade A–F, and per-field verification detail — in under 3 seconds. No manual checking required.
5
Free requests
< 3s
Response time
99.9%
Uptime SLA
Live Demo — validate a lead now
Name
Phone
Company
CAPABILITIES
Every lead is checked across email, phone, company, and postcode before your team spends a minute on it. The AI synthesises all signals into a single grade.
Checks email format, validates MX DNS records, detects disposable and role-based domains (info@, noreply@), and flags catch-all mail servers — instantly, without sending a test email.
Validates UK phone number format, detects line type (mobile vs. landline), checks number portability patterns, and flags premium-rate or non-geographic numbers.
Verifies company name against Companies House in real time. Returns registration status (active / dissolved), company number, and incorporation date — without any manual search.
Validates UK postcode against Royal Mail PAF, resolves the full canonical address, and returns district and county. Flags non-deliverable or fictitious postcodes.
All verified signals are fed into an AI reasoning loop that returns a lead quality score (0–100), grade A–F, and a plain-English risk summary explaining the decision.
Combines disposable email, invalid phone, unregistered company, and undeliverable postcode into a structured fraud risk profile — giving your team a single actionable risk flag.
USE CASES
From inbound sales to fraud prevention, compliance to marketing — the Lead Agent replaces manual contact verification with a single intelligent endpoint.
Sales teams waste hours calling fake, incomplete, or unverifiable leads. The Lead Agent scores every inbound lead before it reaches a rep — letting your team focus exclusively on Grade A and B contacts.
Eliminate Grade D and F leads before reps touch them — save 2+ hours per rep per day
Score to CRM field automatically via webhook — no manual data entry
Flag disposable email, invalid phone, and unregistered company in one call
Prioritise Grade A leads for same-day callback, route Grade C for nurture
Without the Lead Agent, reps manually verify each contact — Google the company, try the number, check LinkedIn. With the API, your CRM populates a verified lead score and risk summary before the rep even opens the record.
AI vs. MANUAL
Manual lead qualification takes 10–20 minutes per contact and produces inconsistent results. The Lead Agent checks email, phone, company, and postcode in under 3 seconds and returns a reproducible AI-generated score.
| Capability | Manual Qualification | Lead Agent API |
|---|---|---|
| Email validation | Send a test email, wait for bounce | MX record check + disposable domain detection in <1s |
| Phone check | Call the number and hope someone answers | Line type detection (mobile/landline) + format validation |
| Company verification | Manually search Companies House website | Real-time Companies House API — active status + company number |
| Postcode validation | Check Royal Mail postcode finder by hand | Royal Mail PAF lookup with district and geocode enrichment |
| Lead quality score | Subjective rep judgement — inconsistent across team | AI-generated 0–100 score and A–F grade, reproducible |
| Time per lead | 10–20 minutes manual checking per contact | Under 3 seconds for all four verifications combined |
| Scale | Bottlenecked by team size — 50–100 leads/day max | Thousands of leads per second via REST API |
| Risk summary | None — rep notes in CRM, if remembered | Structured JSON: risk_summary, risk_flags[], per-field detail |
| Audit trail | Manual CRM notes, no standardised format | Structured JSON response stored per lead, reproducible |
| Integration | Standalone manual process, no webhook | REST API — integrates with any CRM, form, or webhook |
| Fraud detection | Experience-based gut feel | Structured fraud_flags: disposable email, fake number, dissolved company |
| Developer effort | No integration needed — but no automation either | Single POST request — no SDK, works in any language |
HOW TO START
Sign up with an email. No credit card. Your Lead Agent API key is created instantly with 5 free validation requests — covering all three endpoints: validate, verify, and director.
Free Sign UpSend a POST request to lead.apitier.com/v1/validate with name, email, phone, company, and postcode. Get back a grade A–F, a 0–100 score, and per-field verification detail in under 3 seconds.
Add the API call to your lead intake webhook, form submission handler, or CRM workflow. Store the grade and score against each contact. No SDK required — works in any language or no-code tool.
View PricingINTEGRATION
A single POST request. Works in any language. No SDK required.
curl -X POST \
"https://lead.apitier.com/v1/validate?x-api-key=YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"name": "Jane Smith",
"email": "jane@techcorp.co.uk",
"phone": "+44 7911 123456",
"company": "Acme Technologies Ltd",
"postcode": "EC1A 1BB"
}'
# Response
{
"verification_status": "COMPLETE",
"lead_quality_score": 92,
"grade": "A",
"email": { "value": "jane@techcorp.co.uk", "valid": true, "disposable": false, "mx_valid": true },
"phone": { "value": "+44 7911 123456", "valid": true, "line_type": "mobile" },
"company": { "name": "Acme Technologies Ltd","found": true, "status": "active", "company_number": "12345678" },
"postcode": { "value": "EC1A 1BB", "valid": true, "district": "City of London" },
"risk_summary": "High quality lead. All signals verified successfully."
}FAQ
What is the Lead Validate Agent?
The Lead Validate Agent is an AI-powered lead verification service. You send a lead's contact details — name, email, phone, company, and postcode — and receive an AI-generated quality score (0–100), grade A–F, and per-field verification detail in under 3 seconds. It replaces manual lead qualification with an automated, reproducible process.
What does the API actually check?
The API verifies four data points per lead: (1) Email — format, MX DNS record, disposable domain detection. (2) Phone — UK format validation, line type detection (mobile vs. landline). (3) Company — real-time Companies House lookup, active/dissolved status. (4) Postcode — Royal Mail PAF validation with district and geocode. The AI synthesises all four signals into a single grade and risk summary.
How is the lead quality grade calculated?
The AI scores each verified signal — email, phone, company, and postcode — and weights them into a 0–100 composite score. Grade A is 80–100, B is 65–79, C is 45–64, D is 25–44, and F is 0–24. A plain-English risk_summary explains the grade in every response.
Do I need to provide all fields (name, email, phone, company, postcode)?
No. All fields are optional — the API verifies whatever you provide. However, the more fields you supply, the more signals the AI has to score. A lead with just an email will receive a lower confidence score than one with all five fields verified.
How does the email verification work?
The API checks email format, queries DNS for MX records to confirm the domain accepts email, and checks against a database of 10,000+ known disposable email providers (Mailinator, Throwaway, Guerrilla Mail, etc.). It also detects role-based addresses (info@, admin@, noreply@) that are unlikely to belong to a real decision-maker.
Can this detect fake company names?
Yes. The API queries Companies House in real time using the company name provided. If the company is not registered in the UK, the company field returns found: false. If the company is dissolved, struck off, or in liquidation, those statuses are returned as risk flags. This catches leads that invent a company name or claim to work for a business that no longer exists.
How does this relate to the Business Verify and Director Search Agents?
Lead Validate is the first-pass contact verification — it checks whether the email, phone, company name, and postcode are real and active. Business Verify is a deeper due diligence tool for the company itself — registered address, full company profile, VAT verification. Director Search researches the directors of a company. All three share the same API key.
What does a disposable email flag mean for my lead pipeline?
A disposable email (throwaway.io, mailinator.com, etc.) strongly indicates that the lead is not serious about being contacted — they do not want their real email tracked. In sales scoring, disposable email typically contributes to a Grade D or F lead. In fraud prevention, it is a first-order signal to block registration or flag for manual review.
What pricing plans are available?
All new accounts get 5 free Lead Agent requests with no card required. After that, Pay-As-You-Go plans start from £8 for 200 requests (one key covers all three Lead Agent endpoints). There is no monthly subscription and no minimum commitment. Credits are valid for 12 months.
Is there an SLA for the Lead Agent API?
Yes. The Lead Agent API is hosted on AWS (EU-West-1) with a 99.9% uptime SLA. Response times are under 3 seconds at the 95th percentile for a full five-field lead. Email, phone, and postcode checks complete in under 1 second — Companies House lookup may add up to 2 seconds depending on registry latency.