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Saber
app.saber.mcp/saber in the official MCP registry.
Endpoint https://mcp.saber.app/mcp. Source: github.com/saberapp/platform.
The registry describes it as: Sales intelligence — research companies, qualify prospects, and find contacts.
We read its 76 tools on 2026-10-22. Nothing in them matched our tool-poisoning rules.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
contacts-enrich_work_email_batch contacts-enrich_work_email_batch_get companies-enrich_custom companies-enrich_custom_batch contacts-enrich_custom companies-resolve-domain companies-enrich_firmographics companies-enrich_funding companies-enrich_mna companies-enrich_open_jobs companies-enrich_tech_stack contacts-enrich_work_email enrichment_types-list enrichment_runs-list enrichment_runs-get companies-list_summaries companies-generate_summary enrichment_templates-list enrichment_templates-create enrichment_templates-get enrichment_templates-update enrichment_templates-delete monitors-list monitors-create monitors-get monitors-update monitors-delete monitors-pause monitors-resume monitors-trigger monitors-list_signals monitors-list_actions monitors-create_action monitors-get_action monitors-update_action monitors-delete_action monitors-pause_action monitors-resume_action contacts-get_research_by_external_id contacts-create_research contacts-get_research contacts-search contact_lists-list contact_lists-create contact_lists-get contact_lists-update contact_lists-delete contact_lists-get_contacts connectors-list credits-get_balance organisation-get organisation-update company_lists-import company_lists-count_preview company_lists-list company_lists-create company_lists-get company_lists-update company_lists-delete company_lists-get_companies and 16 more
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[](https://lazaretto.dev/mcp-registry/app-saber-mcp-saber)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.