"MCP servers that work without API keys" matching MCP servers:

Enables AI agents to search and read a local, provider-independent email archive, reconstruct contacts and interactions, and prepare draft responses without sending anything.

Enables AI agents to analyze whether they should send an email, evaluating passive aggression and regret probability with a recommendation heavily weighted toward no.

Enables finding and verifying work emails for contacts through a waterfall of provider keys, with per-provider cost attribution and verification after each finder.

An MCP server that provides AI agents with direct access to authoritative Cakemail API specifications, enabling accurate code generation and eliminating hallucination.

Enables to interact with Nylas API for email, calendar, and contacts via MCP, providing documentation, code samples, and code generation tools.

Comprehensive email validation MCP server that checks syntax, MX records, disposable domains, role-based accounts, SPF/DKIM, typo suggestions, and risk scoring.

MCP server for inspecting email domains and addresses, providing objective domain-level email infrastructure answers such as MX, SPF, DMARC, MTA-STS, and disposable-domain evidence.

Sendmux is an email inbox API and email API for AI agents. Use this MCP server to let authorised agents work with Sendmux mailboxes, inbound email, clean JSON parsing, webhooks, outbound sending, provider routing, logs, billing, and team controls.

MCP server wrapping Samotpravil API documentation, providing tools to search for methods, parameters, and examples, with optional proxy to the live API.

Find professional email addresses from name + company domain. Tests 15+ patterns against MX records with confidence scoring, with pay-per-call via x402.

Audits email deliverability configuration for a domain, checking SPF, DKIM, DMARC, and MX records, returning a score and recommendations.

Enables AI assistants to browse, inspect, and call the Cakemail API via dynamically loaded OpenAPI spec.

Enables appending content to Google Docs and creating Gmail drafts with interactive human-in-the-loop approval for safety.

Local-first MCP server for agents that need to work across multiple Gmail and Microsoft 365 accounts without cloud token storage.

MCP server that enables AI agents to search and read locally-archived emails via the Bichon email archiver API, without exposing Gmail or IMAP credentials.

Create disposable email inboxes, extract OTP codes in 15 languages, and receive webhooks — all from your AI agent. One call: create inbox → wait for email → get the verification code. Supports 7 domains, email forwarding, and HMAC-signed webhooks with OTP included in payload. Free tier available.

Enables AI assistants to read, search, and manage Outlook/Office 365 work mailboxes and calendars, and create reply drafts without sending by default.

Enables AI agents to submit and triage leads via email, check endpoint health, and generate production-ready form code across multiple frameworks without requiring API keys.

Enables AI agents to create private GitHub issues for decisions, send email alerts, wait for human comments, and parse replies so work can resume. Supports guided setup and MCP integration without requiring separate AI API keys or an always-on cloud server.

Enables Claude to read, search, organize, and clean up Yahoo Mail emails over IMAP without Yahoo API keys.