Alternatives to LinkupAPI
Run LinkedIn, email, WhatsApp and iMessage outreach from any MCP client.
LinkupAPI is tagged AI, API, Productivity. The servers below cover similar ground, ranked by how many tags they share with it, then by GitHub stars.
Abstract API MCP by usefulapi
by io.usefulapi
Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract.
https://abstract-api.usefulapi.io/mcpabundance-apis
by com.abundanceapis
Try 26 utility REST APIs keylessly: NAICS classification, IP geo, email validation, currency.
https://abundanceapis.com/mcpAcuity Scheduling MCP by usefulapi
by io.usefulapi
Read appointments, types, calendars and availability; create, cancel or reschedule bookings.
https://acuity-scheduling.usefulapi.io/mcpAgent Email List — Free SMTP Relay for AI Agents
by com.agentemaillist.ai
Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.
https://ai.agentemaillist.com/mcpagent-mail
by dev.mailkite
Give an AI agent its own inbox — receive email as a webhook, send over a verified domain.
https://mcp.mailkite.dev/mcp?ref=agent-mailAgentBrink
by com.agentbrink.www
Give your AI agent an identity: its own email, webhook, repo, secrets vault, memory and skills.
https://api.agentbrink.com/mcpAgentContinuity
by net.agentcontinuity
Private memory, scratchpads, context export/restore and task handoff for AI agents.
https://api.agentcontinuity.net/mcpAgenticEmail
by dev.agenticemail
Hosted email for AI agents: create inboxes, send, receive, and reply over MCP with scoped API keys
https://api.agenticemail.dev/mcpAI Tasker
by dev.theboomer
Task and sprint coordination for humans and AI agents, with scoped API keys and full audit trail.
https://mcp.ai-tasker.theboomer.dev/mcpAPIVerve
by com.apiverve
380+ live data, validation and utility APIs in one MCP server: IP, DNS, email, FX, weather and more.
https://api.apiverve.com/v1/mcpArthur Online MCP by usefulapi
by io.usefulapi
Read Arthur properties, units and tenancies; track maintenance and add tasks or notes.
https://arthur-online.usefulapi.io/mcpAura
by dev.rohnelt.aura
Email address, webhook, durable memory and zero-token waiting for agents. Paid in USDC via x402.
https://aura.rohnelt.dev/mcp