CrewAI Social Media: Give a Crew the Power to Post

Why Posta + CrewAI?

Path 1 — Posta MCP via the crewai-tools MCP adapter (recommended)

crewai-tools ships an MCPServerAdapter that loads any MCP server's tools into a Crew. Point it at the Posta MCP server and every Posta capability is a tool the agents can call.

pip install crewai crewai-tools

# crew.py
import os
from crewai import Agent, Task, Crew
from crewai_tools import MCPServerAdapter

posta_params = {
    "command": "npx",
    "args": ["-y", "posta-mcp"],
    "env": {"POSTA_API_TOKEN": os.environ["POSTA_API_TOKEN"]},
}

with MCPServerAdapter(posta_params) as posta_tools:
    publisher = Agent(
        role="Social Media Publisher",
        goal="Draft and schedule launch posts per platform",
        backstory="An experienced multi-platform social media strategist.",
        tools=posta_tools,
        verbose=True,
    )

    task = Task(
        description="Draft and schedule a LinkedIn post and a Bluesky post about our v2 launch.",
        agent=publisher,
        expected_output="Two scheduled posts (LinkedIn, Bluesky) confirmed by the Posta tool.",
    )

    crew = Crew(agents=[publisher], tasks=[task])
    result = crew.kickoff()
    print(result)

Path 2 — Wrap the REST API with @tool

Simpler when you want a single typed call and don't need the model to discover Posta's full tool surface.

from crewai.tools import tool
import os, requests

POSTA = "https://api.getposta.app"
HEADERS = {"Authorization": f"Bearer {os.environ['POSTA_API_TOKEN']}"}

@tool("Schedule social media post")
def schedule_post(
    caption: str,
    social_account_ids: list[int],
    scheduled_at: str,
    media_ids: list[str] | None = None,
) -> str:
    """Create a Posta draft on the given accounts and schedule it.
    scheduled_at is ISO 8601. media_ids are Posta media IDs."""
    # Step 1 — create the draft
    r = requests.post(
        f"{POSTA}/v1/posts", headers=HEADERS, timeout=30,
        json={
            "caption": caption,
            "socialAccountIds": social_account_ids,
            **({"mediaIds": media_ids} if media_ids else {}),
        },
    )
    r.raise_for_status()
    post_id = r.json()["id"]
    # Step 2 — schedule it
    r = requests.post(
        f"{POSTA}/v1/posts/{post_id}/schedule", headers=HEADERS, timeout=30,
        json={"scheduledAt": scheduled_at},
    )
    r.raise_for_status()
    return f"Scheduled post {post_id} for {scheduled_at}"

Common patterns