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19 Best Email MCP Servers: compared and ranked, October 2026Ranked from 2,721 matching servers on stars, growth, downloads and maintenance. Updated .

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    Metis gives AI agents expert know-how that named reviewers have approved, and only where its recorded conditions match the situation. High-risk situations go to a person. When an agent sees practice depart from procedure, it can send the expert one short question. Every retrieval is recorded on a hash-linked evidence chain.
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    432 PyPI
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    Apache 2.0
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    Integrates the Metis FCA Handbook AI Harness into Claude Desktop to analyze FCA Handbook applicability for financial products, services, or firms, returning structured compliance reasoning with verbatim citations.
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    78 PyPI
    MIT
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    Official MCP server for the EU AI Act. Search and access Articles, Recitals, Annexes, timelines, obligations, prohibited practices, GPAI requirements, conformity assessments, and compliance information across all 24 official EU languages.
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    54 npm
    MIT
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    Enables AI assistants to send documents for e-signature, track signing status, remind pending signers, and download signed PDFs with audit-trail hashes via the AddSign API.
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    42 npm
    MIT
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    Deterministic SNAP eligibility logic, exposed as auditable Model Context Protocol tools. An AI agent can read, reason, and orchestrate, but the eligibility determination itself is made by versioned, tested, cited code that a caseworker, an auditor, or a court can inspect.
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    Enables AI agents to validate Mexican RFC, CURP, CLABE and NSS identifiers with real check digits, parse CFDI 4.0 invoices with labelled SAT catalogue codes and verified totals, and query the SAT's public status service to see whether an invoice is still valid. It also generates coherent test people and companies, all read-only and without API keys, certificates or PAC contracts.
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    Read and check European e-invoices (Factur-X, ZUGFeRD, XRechnung, UBL, CII) from an AI assistant: contents in plain text plus an EN 16931 consistency check.
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    MCP server that exposes the OBBBA No Tax on Tips federal deduction logic as callable tools, enabling users to check eligibility and estimate tip deductions.
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    Enables MCP-compatible AI agents to screen counterparties against government sanctions lists and fraud-cluster registries, check regulatory tradability across 235 jurisdictions, and run pre-deal compliance checks via OilFlow APIs, with three tools usable without an API key.
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    21 npm
    Apache 2.0
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    This MCP server enables searching and retrieving Romanian legislation from the Portal Legislativ database via its SOAP API, providing metadata and full text with verifiable citations.
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    69 PyPI
    Apache 2.0
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    Enables EU AI Act compliance assessment by classifying AI systems, listing obligations, computing deadlines, and scanning repos for required documentation, all running locally.
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    MIT