Home Agent Tools Twilio Twilio Communications APIs for voice calls, SMS, WhatsApp and verification, plus Conversation Relay for plugging voice AI into calls.
Category Agent Tools Best for Phone numbers, calls and texts for an agent Pricing paid · Pay as you go: calls from $0.014/min outbound, SMS from $0.0083/message. (official pricing ) Last verified 2026-10-17 Visit Twilio →
More in Agent Tools Agent Tools paid Social media scheduler with a hosted MCP server, CLI, public API and webhooks on every plan, so agents can schedule posts across X, LinkedIn, Instagram, TikTok, YouTube, Bluesky and more.
Best for: Letting an agent post to social channels for you
Pricing: From $29/mo (Standard, 5 channels); 7-day free trial. MCP, CLI and API on every plan. Source
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Agent Tools paid Social media API for products and AI platforms: post, schedule, pull analytics and moderate comments across 14+ networks, billed per social profile.
Best for: Apps that post to social on behalf of their users
Pricing: Premium $149/mo (1 profile); Launch $299/mo with 28-day free trial; Business from $599/mo. Source
Agent Tools freemium Email API for developers with transactional and marketing email, plus inboxes your agents can send, receive and reply from via API and MCP.
Best for: Giving an app or agent a reliable email API
Pricing: Free: 3,000 emails/mo (100/day); Pro from $20/mo for 50,000 emails. Source
Agent Tools freemium Email inboxes built for AI agents, with an API, SDKs, an MCP server, threads, drafts, webhooks and custom domains.
Best for: Giving each agent its own inbox
Pricing: Free: 3 inboxes, 3,000 emails/mo; Developer $20/mo; Startup $200/mo. Source
Agent Tools paid Payments platform with an MCP server, agent plugin and agent skills, plus tools to sell through agents and accept agent-initiated payments.
Best for: Letting agents work with payments, billing and checkout
Pricing: 2.9% + 30¢ per successful domestic card transaction; no setup or monthly fees. Source
Agent Tools freemium Developer platform for building voice AI agents that make and take phone calls; pick your own transcriber, model and voice providers.
Best for: Building custom voice agents on the phone
Pricing: $0.05/min Vapi hosting plus provider costs; $5 free credits to start. Source
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