What is an MCP server for posting?

MCP (Model Context Protocol) lets an LLM call external tools with typed schemas. Zernio's native MCP server exposes 280+ tools, so an agent can list accounts, schedule posts, and read analytics without you writing glue code.

What rate limit do I need for AI agents?

For a single agent, 60 req/min is fine. For multi-tenant SaaS with dozens of agents, aim for 1,000+ — Zernio's 1,200 req/min is the current bar.

Can I orchestrate posting from n8n?

Yes. Postproxy ships native n8n nodes, Upload-Post is easy to hit with a generic HTTP node, and Zernio exposes an MCP endpoint that n8n's AI-agent nodes can call.

What about compliance and safe posting?

You want idempotency keys, structured error responses, and rate-limit headers. Postproxy's state machines and Zernio's per-network error codes are the most agent-friendly.

Best Social Media APIs for AI Agents & MCP (2026)

Last fact-check: July 2026

AI agents need three things from a posting API: predictable rate limits, structured metadata so the agent can query state, and ideally a native MCP server so Claude, GPT, or Gemini can call tools directly. Only 5 tools tick every box in 2026.

Zernio leads with a native MCP server exposing 280+ tools and a 1,200 req/min limit. Upload-Post and Postproxy are the pragmatic picks when you'd rather orchestrate from n8n or your own Python.

Our top 3 picks

Zernio

4.8

Best native MCP server

Upload-Post

4.7

Best SDKs for Python agents

Postproxy

4.6

Best n8n integration

#1
Zernio
4.8
Best for: Best native MCP server
from$6/mo
API-first posting stack for teams that need scale, structured errors, and a real MCP server.
Pros
- Full REST API on every plan
- 1,200 req/min is high enough for serious automation
Cons
- Under 10 accounts, the per-account price is still higher than Upload-Post
- The product surface is wider than many small teams need
Starting price $6 / account
API included Yes
Rate limit 1,200 req/min
Platforms 15
Visit site Read review
#2
Upload-Post
4.7
Best for: Best SDKs for Python agents
from$16/mo
Low-cost posting API with unlimited uploads and server-side FFmpeg that does real video work.
Pros
- $16/month remains one of the cheapest real API entry points
- Unlimited uploads on the entry plan
Cons
- The jump from 15 profiles to the top tier is steep
- If you need a polished dashboard, this isn't that product
Starting price $16 / month
API included Yes
Rate limit generous
Platforms 8
Visit site Read review
#3
Postproxy
4.6
Best for: Best n8n integration
from$17/mo
Multi-tenant posting API with scoped keys, queue control, and the SaaS features dashboards rarely ship.
Pros
- Multi-tenant key model is genuinely useful
- Flat $99 at 50 profile groups is competitive
Cons
- This is not the product for teams shopping for a visual planner
- Docs are improving, but they're not the strongest in the category yet
Starting price $17 / month
API included Yes
Rate limit priority queues
Platforms 9
Visit site Read review
#4
Publora
4.4
Best for: Best no-rate-limit option
from$2.99/mo
Low-cost API entry point with unusual network coverage and soft posting caps instead of per-minute limits.
Pros
- Very low entry price
- Useful support for Bluesky, Mastodon, and Threads
Cons
- Post caps matter if you're scheduling heavily
- Analytics remain basic
Starting price $2.99 / account
API included Yes
Rate limit no per-minute cap
Platforms 10
Visit site
#5
Blotato
4.3
Best for: Best turnkey AI pipeline
from$29/mo
AI-heavy creator workflow with faceless video generation built into the same pipeline.
Pros
- AI and video generation are integrated
- Fast to set up for one repeatable pipeline
Cons
- Credits can burn through quickly
- Not a broad scheduler for mixed team use
Starting price $29 / month
API included No
Rate limit —
Platforms 8
Visit site

Starting price	$6 / account
API included	Yes
Rate limit	1,200 req/min
Platforms	15

Starting price	$16 / month
API included	Yes
Rate limit	generous
Platforms	8

Starting price	$17 / month
API included	Yes
Rate limit	priority queues
Platforms	9

Starting price	$2.99 / account
API included	Yes
Rate limit	no per-minute cap
Platforms	10

Starting price	$29 / month
API included	No
Rate limit	—
Platforms	8

Managing 50 channels? Prices for the same job range from $99 to $350 per month depending on the tool. Our calculator shows exactly where you'll land.Open the cost calculator →

Full comparison

#	Tool	Starting price	Price at 10 channels	Rate limit	Max video	Platforms
#1	Zernio	$6	$48	1,200 req/min	4 GB	15
#2	Upload-Post	$16	$33	generous	10 GB	8
#3	Postproxy	$17	$17	priority queues	2 GB	9
#4	Publora	$2.99	$29.9	no per-minute cap	1 GB	10
#5	Blotato	$29	$29	—	—	8

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