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PostZen

The Social Media API for Developers and AI Agents·postzen.dev

PostZen is a unified social media API that lets developers, agencies, and AI agents publish, schedule, and analyze posts across 10 social platforms through a single integration. It handles OAuth connections, media transformation, rate limits, and retries per platform so teams don't need to build separate integrations for each network. It also offers a comments and DM inbox, analytics, bulk CSV scheduling, and a hosted MCP server for AI agent workflows.

What it's for

Publish and schedule posts across 10 social platforms with one APIAdd social publishing features to apps or AI agentsBulk schedule posts from a CSV or the APIManage comments and Instagram direct messages from one inboxTrack post, account, and follower analyticsAutomate publishing through AI agents via a hosted MCP serverWhite-label social publishing inside a product's own dashboard or client portal

Features 17

Analytics API with audience demographics and engagement trends
Bulk CSV scheduling
CLI for developers and agents
Comments inbox for Instagram, Facebook, and Threads
Cross-platform media validation and transformation
Hosted MCP server for AI agent publishing
Instagram direct message management
Managed OAuth connections without developer app reviews
Official Node.js and Python SDKs
Post history import and cross-time performance comparison
Presigned media uploads and upload by URL
Profiles/workspaces to organize accounts by brand or client
Publish to 10 social platforms through one API
Scheduling and queue-based publishing
Scoped API keys and idempotent posting
Webhooks for post and account events
White-label usage inside a product's own dashboard

At a glance

free tierAPI

TypeWeb app

DeploymentCloud

PlatformsWeb

Fordevelopers, AI agents, agencies, solo builders, product teams

CompanyPostZen

Integrations

InstagramX/TwitterLinkedInFacebookThreadsYouTubeTikTokBlueskyPinterestTelegramClaude CodeCursorCodexOpenClawGrokBotHermesStripe

Resources

Docs

Pricing

Free plan is $0/month with 20 posts and 2 accounts included. Paid plans (Starter $19, Pro $49, Scale $149 per month) all include unlimited posts. A plan finder tool shows a $34/mo figure for Starter when configured for 10 accounts, reflecting the base plan plus extra-account fees rather than a separate listed price. X/Twitter API usage is billed separately at cost.

FreeFree

No credit card required unless connecting an X account

20 posts per month, 2 accounts included, 60 API requests/min

Starter$19/mo

$3/month per extra connected account

5 accounts included, 120 API requests/min, unlimited posts

Pro$49/mo

$3/month per extra connected account

20 accounts included, 600 API requests/min, unlimited posts

Scale$149/mo

$3/month per extra connected account; contact for larger needs

100 accounts included, 2,000 API requests/min, unlimited posts