"Free PostgreSQL Database Solutions" matching MCP servers:

Enables AI agents to search a global professional database in plain English, reveal full profiles, and fetch verified work emails, email verification, reverse email lookup, and LinkedIn and company lookups. Searches are free, while most lookups cost credits that are refunded automatically when nothing is found.

A collection of MCP servers for database management and Gmail integration, allowing AI agents to perform database queries and email operations.

MCP server for IntoDNS.ai providing 36 free tools for DNS, DMARC, SPF, DKIM, BIMI, DNSSEC, MTA-STS, FCrDNS, blacklist and email security checks. Citation-grade report snapshots with content hashes. No API key required.

An MCP server that exposes a local notmuch email database to an LLM client such as Claude. It is read-first: searching, reading, and understanding mail is always available; writing anything (drafts, tags, exported files) requires an explicit opt-in flag and is confined to clearly bounded locations.

Email-deliverability tools for AI agents — 12 MCP tools across email verification, DNSBL across 50 zones, SPF/DKIM/DMARC analysis, spam-trap scoring, domain intelligence, and email finder. Free tier with no credit card.

Enables AI agents to search job openings across free sources, prepare application materials using known experience, and handle authorized email sending and follow-ups.

Agent-native cold-email infrastructure providing ~12 high-level tools for domain setup, mailbox provisioning, campaign launch, inbox management, and metrics, all operated via MCP or CLI.

Access 5+ ATXP agent tools via MCP: web search, AI image generation, email, and music generation. Free tier with pay-per-use Pro tier via x402 micropayments (USDC on Base mainnet).

Your real mailbox and calendar for your AI agent — Microsoft 365 via Graph or any IMAP — as 24 tools: read, search, attachments as text, sender history, drafting from identity and knowledge files, free-slot computation. Send, reply, delete and calendar writes need out-of-band human approval: the agent cannot approve its own actions.

Register free *.pntr.dev subdomains and manage them from your AI assistant — DNS records, wildcard DNS, disposable email inboxes, and HTTP request capture for webhook debugging. 15 tools over stdio; hosted endpoint also available.

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.

MailKite offers email sending and receiving for agents at your domain or free inboxes Create inboxes for your agent Send emails from your agent Receive emails to your webhook Receive emails to your agent

MCP server for Open-Xchange & standards-based mail: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts, free/busy.

Agent email with recipient allowlist and consent before send. For personal and small-team OpenClaw/Hermes operators. Free to try; Starter $9.99 in-app. Not for cold-outbound fleets. Not an official OpenClaw endorsement.

Secure MCP server for on-prem Microsoft Exchange (EWS) with tools for email, calendar, contacts, folders, attachments, and free/busy availability.

Free email for AI agents with hardware attestation, real SMTP/IMAP/JMAP, and real-time notifications.

Enables remote-only interaction with the mailery.co hosted HTTPS API via CLI, MCP, and SDK, without running a local mail server or accessing a database/provider account.

Free email server for AI agents with hardware attestation, enabling agents to send, receive, and manage emails via MCP tools.

A production-style MCP server exposing six business tools (web search, database, CRM, email, calendar, analytics) to AI clients via a secure, authenticated interface, with mock mode and a reference agent client.

Keyless email validation: disposable/burner, role-account, and free-provider detection, MX checks, and typo suggestions. Tools: check_email, check_domain.