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Cognita

net.fmelo/cognita in the official MCP registry. Endpoint https://cognita.fmelo.net/mcp.

The registry describes it as: Passive OSINT and security recon: DNS, TLS, email posture, IP reputation, CVE/KEV, CT logs.

Connect it

The endpoint answers MCP over HTTP; that is how we read it. Add it to your client:

claude mcp add --transport http cognita https://cognita.fmelo.net/mcp

{
  "mcpServers": {
    "cognita": {
      "url": "https://cognita.fmelo.net/mcp"
    }
  }
}

code --add-mcp '{"name":"cognita","type":"http","url":"https://cognita.fmelo.net/mcp"}'

Some servers ask you to sign in the first time a client connects, or want a key from the people who run them; the server's own docs say which. The free lazaretto-guard plugin reads a server's tools the moment Claude Code adds it and asks you if one of our rules matches.

Tools it advertises

asn_prefixes cve_triage typosquat_scan email_header_analyzer dns_propagation email_posture ct_org_search geo_route tls_posture feodo_c2_check dmarc_check tranco_rank rpki_validation cve_lookup spoofability subdomain_takeover_check tls_certificate dns_lookup dshield_ip_check host_exposure scan_site abuse_contact kev_check reverse_dns ip_reputation hsts_preload_check disclosure_contacts rdap tor_exit_check robots_sitemap passive_dns ip_blocklist_check epss_score spf_expand asn_relations spf_check wayback_snapshot cert_revocation cert_transparency related_domains zone_transfer_check urlscan_lookup mx_lookup dkim_lookup investigate wayback_urls blacklist_check ip_reputation_aggregate asn_geoip security_txt caa_dnssec

Run this server? Show the check in your README

The badge reflects the latest weekly read:

[![MCP tool check](https://lazaretto.dev/mcp-registry/net-fmelo-cognita/badge.svg)](https://lazaretto.dev/mcp-registry/net-fmelo-cognita)

How this was checked

Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.

To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.

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