"browser tool" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Serverless 15-tool B2B email deliverability, domain security, OpenAPI breaking-change release gate, LLMO /llms.txt auditor, and quantitative trading risk MCP connector.
Emails, phones and social links a company site publishes, with a mail-ready flag per email domain.
Free email deliverability tools: SPF, DKIM, DMARC, blacklist and header checks, cold email scoring.
Email Engagement Report turns a raw email event export into a per-recipient engagement report.
Find and qualify B2B leads, manage outreach campaigns, and prepare replies through Funkel AI. Supports LinkedIn, X, and email workflows. Tool discovery is public. Tool calls require OAuth or a personal access token.
Email inboxes for recurring agent work. Read, search, reply, draft and organize correspondence. OAuth or a Cherami API key authorizes private mail access; tool discovery is public. Setup: https://cherami.to/docs/mcp
Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.
Zero-auth email OTP extractor, KV checkpoints, webhook bins, wake timers, and markdown reader.
Send transactional email from your AI agent through a Resend-compatible API. SpacePost's MCP server lets assistants send email and manage domains, webhooks, audiences, contacts and suppressions; every API endpoint is a tool, and sending-only keys and a read-only mode limit what the agent can do. Auth: your SpacePost API key as a Bearer token. Free plan: 3,000 emails/month. Built on Amazon SES, run by an EU company (Studio 404 d.o.o.). Docs: https://docs.spacepost.dev/tools/mcp/
Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.
Free agent tools, no sign-in: browser flows, test inboxes, web extract, site and domain checks.
32 pay-per-call x402 tools: x402 seller audit, invoice intake, OCR, PDF, email, web, on-chain
DMARC/SPF/DKIM/MX checks, email score, 100-domain bulk score, webhook watch alerts (x402 USDC).
Free quote and late-fee calculators, paid reminder emails and a $1 small-business tool stack report.
Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words
Mailvett: validate emails. MX, provider, disposable/role/free flags, typo fix, verdict.
Free email verification, business calculators, UAE estimates and drafts. No API key.
13 paid x402 tools, USDC/Base. Free check: GET /preview<path>=200 sample. Copy-paste pay: /llms.txt
AgentiSend is a transactional email API: send through verified domains with a message log, budgets, a preflight and refusals that name the fix; built so AI agents can send on your behalf. The hosted MCP server at https://api.agentisend.com/mcp exposes 82 tools (44 on tools/list; the rest via list_more_tools). A send is one message or a batch of up to 500 items with per-item results. preflight_email runs every gate a real send runs, sends nothing, and costs nothing. Every 4xx returns code, message, and fix. There is no tool for unsolicited mail. Auth is a bearer API key or OAuth 2.1 with dynamic client registration. Starter prompts: "Send this receipt to the customer." "Preflight this send and tell me what would stop it." "What can I spend today?"
AI-operated. Free SPF (RFC 7208 count), DMARC, MTA-STS, DMARC rua/ruf readers. Paid audit $29.
