B2B Domain Contact, Email & DNS Enricher MCP | RevClamp ContactPulse

B2B Domain Contact, Email & DNS Enricher MCP | RevClamp ContactPulse

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Deterministic B2B Domain Contact, RFC 9116 /.well-known/security.txt, Schema.org ContactPoint JSON-LD, de-obfuscated email & social profile extractor, and DNS-over-HTTPS (MX / SPF / DMARC) deliverability posture enricher over Model Context Protocol (MCP 2025-06-18 stdio) and Apify Pay-per-Event.

Independent Tool Notice: RevClamp ContactPulse is an independent B2B intelligence tool developed by RevClamp Engineering. All company domains and trademarks referenced in examples belong to their respective owners.

Key Capabilities

1. Multi-Surface B2B Role Contact Extraction & De-Obfuscation:
   • Parses Schema.org Organization / ContactPoint JSON-LD blocks, mailto: anchors, Cloudflare data-cfemail hex-encoded strings, and HTML entity / bracketed obfuscations ([at], (at), @, @).
   • Automatically prunes false-positive tracker/asset addresses (*@*.ingest.sentry.io, *@sentry.wixpress.com, example.com, image filename collisions like [email protected]).
   • Classifies every verified contact into canonical B2B functional roles: SECURITY, PRIVACY_DPO, BILLING_FINANCE, LEGAL, SUPPORT, SALES, PRESS, and GENERAL.
2. RFC 9116 /.well-known/security.txt & /security.txt Compliance Parser:
   • Parses Contact:, Expires:, Encryption:, Acknowledgments:, Policy:, Hiring:, Canonical:, and Preferred-Languages:.
   • Evaluates expiration timestamps into deterministic statuses (VALID_ACTIVE, EXPIRED, MISSING_EXPIRES, NOT_FOUND).
3. DNS-over-HTTPS (DoH) MX / SPF / _dmarc Deliverability Posture:
   • Resolves MX, TXT (v=spf1), and _dmarc.<domain> (v=DMARC1) via Cloudflare and Google DNS-over-HTTPS (https://cloudflare-dns.com/dns-query & https://dns.google/resolve).
   • Fingerprints the enterprise email gateway (GOOGLE_WORKSPACE, MICROSOFT_365, PROTONMAIL, FASTMAIL, PROOFPOINT, MIMECAST, AMAZONSES, CUSTOM_MX, NONE) and computes a deterministic deliverabilityGrade (A+, A, B, C, D, F).
4. Zero-Trust SSRF Port-443 Guard & 30 KB MCP Envelope Ceiling:
   • Enforces https: port 443 only, blocks IPv4/IPv6 literals, localhost, .local, .internal, and cloud metadata hosts, re-validates every 3xx redirect target (redirect: "manual"), and enforces a 30,000-byte UTF-8 JSON-RPC ceiling with automatic rcd1_ cursor rewind.

1. Apify Store Cloud, Clay / n8n & REST API Quick Start

Run RevClamp ContactPulse in the cloud on Apify Store (revclamp/b2b-domain-contact-enricher-mcp) with zero local setup, or trigger it directly from Clay, n8n, Make, or any HTTP pipeline via the Apify REST API:

curl -s -X POST \  "https://api.apify.com/v2/acts/revclamp~b2b-domain-contact-enricher-mcp/run-sync-get-dataset-items" \  -H "Authorization: Bearer $APIFY_TOKEN" \  -H "Content-Type: application/json" \  -d '{    "query": "stripe.com, linear.app, cloudflare.com",    "includeDnsPosture": true,    "includeSecurityTxt": true,    "maxResults": 5  }'

Transparent Pay-per-Event Pricing & Free-Tier Credit Math

• Event Price: $0.0020 per enriched B2B domain profile (domain-contact-profile-enriched).
• What $1.00 in Free Apify Credits Gets You: Approximately ~500 enriched B2B domain profiles with role-classified organizational contacts (SECURITY, PRIVACY_DPO, BILLING_FINANCE, LEGAL, SUPPORT, SALES, PRESS), RFC 9116 /.well-known/security.txt audit, and DNS-over-HTTPS MX/SPF/DMARC deliverability grades.
• Zero-Waste Billing Guarantee: You pay $0.00 on EMPTY_RESULT, INVALID_INPUT, or upstream rate limits. Only verified, non-empty B2B domain profiles delivered to your Dataset are billed.

2. Local AI Agent & MCP Server Quick Start (stdio & CLI)

Run directly via npx (supports natural parameter aliases query, domain, domains, or url):

# Start MCP JSON-RPC 2.0 server over stdionpx -y @revclamp/b2b-domain-contact-enricher-mcp --mcp-stdio
# Run built-in self-testnpx -y @revclamp/b2b-domain-contact-enricher-mcp --self-test
# Inspect exposed MCP toolsnpx -y @revclamp/b2b-domain-contact-enricher-mcp --list-tools
# Call a tool directly from CLInpx -y @revclamp/b2b-domain-contact-enricher-mcp --call resolve_b2b_domain_contacts '{"domain":"stripe.com"}'

Claude Desktop / Cursor / Windsurf Configuration

{  "mcpServers": {    "revclamp-contactpulse": {      "command": "npx",      "args": ["-y", "@revclamp/b2b-domain-contact-enricher-mcp", "--mcp-stdio"]    }  }}

Exposed MCP Tools (3)

Supported Input Aliases & Smart Auto-Resolution

• Target & Limit Aliases (query, domain, domains, company, url, email, maxResults / limit / max_results): Works identically across Apify Actor REST input, MCP tools, and Core Engine (domains accepts either a string array or a comma/newline-separated list).
• 23+ B2B Subdomain Root Extraction & Multi-Tenant Preservation: Pasting https://security.stripe.com, https://about.gitlab.com, https://trust.linear.app, or https://ir.netflix.com automatically resolves to the registrable root organizational domain (stripe.com, gitlab.com, linear.app, netflix.com) across 41 two-part ccTLDs (.co.uk, .com.au, .com.vn) so DNS MX/SPF/_dmarc deliverability grades stay accurate, while preserving multi-tenant developer hosts (acme.github.io, store.myshopify.com).
• Strict Non-Empty Validation & CONFLICTING_PARAMETER_ALIASES Guard: Fails closed with INVALID_INPUT / JSON-RPC -32602 (CONFLICTING_PARAMETER_ALIASES, $0.00 billed) on empty {} input or conflicting query vs domain / email aliases.

RevClamp B2B Intelligence Suite (Companion Tools)

Companion Web Playground & Ecosystem Links

• Interactive Browser Playground: https://revclamp.com/tools/b2b-domain-contact-enricher
• RevClamp MCP Hub: https://revclamp.com/mcp#mcp-contactpulse-companion-card

Data Processing & B2B Role-Mailbox Policy

• Role-Based organizational mailboxes only (No Personal Data): ContactPulse strictly extracts and returns organizational role and functional mailboxes (SECURITY, PRIVACY_DPO, BILLING_FINANCE, LEGAL, SUPPORT, SALES, PRESS, and generic functional inboxes such as info@, contact@, hello@, office@, team@). Personal or named individual email addresses (firstname.lastname@) are automatically excluded at extraction time (PERSONAL_MAILBOX_EXCLUDED_BY_B2B_ROLE_POLICY).
• Public Standards Only: All signals are resolved in real time from public RFC 9116 /.well-known/security.txt, public DNS MX/SPF/_dmarc records, and public Schema.org Organization / ContactPoint metadata. Offline fixture samples (SAMPLE_FIXTURE_DIRECTORY) are used only in local self-tests or the preview playground and are never billed.

License

MIT © RevClamp Enterprise