Letmepost

Open-source API to publish to multiple social platforms with one POST request

letmepost.dev

Verified API available Works with n8n Free tier

Quick facts
What is it	Open-source API to publish to multiple social platforms with one POST request
Pricing	Freemium — from $79/mo
Free tier	Yes
Platform	API
API	Yes
Works with	n8n
Best for	publishing content to multiple social platforms from a single API call, building social features into SaaS products without managing platform integrations

Data updated Aug. 17, 2026

What does Letmepost do?

Letmepost is an open-source API that lets you publish to eight social media platforms — X, LinkedIn, Bluesky, Instagram, Facebook, Threads, Pinterest, and TikTok — with a single POST request. Instead of writing separate code for each platform's API, you send one request to Letmepost and it fans out the content to every connected account. The API handles authentication, platform-specific formatting, and error handling so you don't have to.

What makes Letmepost different from a simple wrapper is the infrastructure-grade guarantees it provides. Before any request reaches a social platform, 80 preflight rules check for issues like character limits, media format problems, and account state. If something's wrong, the API returns a structured error with the exact rule that fired, the platform version, and a link to documentation on how to fix it. Every write accepts an idempotency key, so retries from network failures never cause duplicate posts. The API also includes a native MCP server, which means AI agents like Claude and Cursor can drive the full publishing surface directly.

Letmepost is built for developers who need to add social publishing features to their products without spending weeks on platform reviews and integration work. It's especially useful for SaaS teams embedding social sharing, AI agent builders who want their agents to post updates, and indie developers running side projects. The pricing is flat per organization — $0 for 50 posts a month, $79 for 5,000 posts, and $299 for 25,000 posts — and the entire codebase is Apache 2.0, so you can self-host it for free.

Integration Platform (iPaaS)Workflow Automation

Key features

What makes it stand out

Single POST endpoint fans out to eight platforms (X, LinkedIn, Bluesky, Instagram, Facebook, Threads, Pinterest, TikTok)

80 preflight rules catch errors locally before they reach a platform, with clear error codes and docs links

Idempotency keys let you safely retry requests without double-posting

Native MCP server for AI agents — Claude, Cursor, and other MCP clients can drive the full API

Flat per-org pricing with a free tier (50 posts/month) and self-host option under Apache 2.0

Who is Letmepost for?

Who benefits most from this tool

publishing content to multiple social platforms from a single API call

building social features into SaaS products without managing platform integrations

letting AI agents post updates to social media via MCP

Pricing

Free tier available — start without a credit card

Free

50 posts per month
50 posts / mo
Unlimited connected profiles
Unlimited team members
All 8 platforms
Full API surface
Webhook endpoints & events
Idempotency keys
Preflight validation
Scheduling & cancel
Native MCP server + CLI

Pro

$79.0/month

5,000 posts per month
5,000 posts / mo
Unlimited connected profiles
Unlimited team members
All 8 platforms
Full API surface
Webhook endpoints & events
Idempotency keys
Preflight validation
Scheduling & cancel
Native MCP server + CLI

Business

$299.0/month

25,000 posts per month
25,000 posts / mo
Unlimited connected profiles
Unlimited team members
All 8 platforms
Full API surface
Webhook endpoints & events
Idempotency keys
Preflight validation
Scheduling & cancel
Native MCP server + CLI

Self-host

Free

Unlimited posts
Unlimited connected profiles
Unlimited team members
All 8 platforms
Full API surface
Webhook endpoints & events
Idempotency keys
Preflight validation
Scheduling & cancel
Native MCP server + CLI

Business+

Custom

Enquiry-driven pricing
Volume discounts
SSO
SCIM
DPA
Custom SLA

Gallery

Click any image to enlarge

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