5 Things You Can Automate with the PostStash API

The PostStash API is a single endpoint that posts to X, Threads, and LinkedIn. That simplicity is the point — it makes social posting a building block you can drop into almost any workflow.

Here are five automations we've seen people build (or built ourselves). Each one took an afternoon or less.

1. Newsletter → Social Syndication

You just hit "send" on your newsletter. Now you need to tweet about it, post to Threads, and maybe share on LinkedIn. Instead of context-switching, hook into your newsletter provider's webhook (Buttondown, ConvertKit, Resend — most have one) and fire a request to PostStash with the subject line and link.

// Webhook handler (e.g. in a Next.js API route)
export default async function handler(req, res) {
  const { subject, url } = req.body;

  await fetch("https://poststash.com/api/posts", {
    method: "POST",
    headers: {
      "Authorization": "Bearer ps_live_YOUR_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      platforms: ["x", "threads"],
      text: `New issue: ${subject}\n\nRead it → ${url}`,
    }),
  });

  res.status(200).json({ ok: true });
}

Total code: ~15 lines. Total OAuth headaches: zero.

2. Blog Post → Week of Scheduled Content

One blog post can fuel a week of social content: a launch announcement, a key takeaway, a quote, a question for followers, and a weekend re-share. Use an LLM to extract the variants, then schedule them across the week with PostStash:

import openai, requests, datetime

blog_text = open("post.md").read()

# Ask GPT to generate 5 social variants
variants = openai.chat.completions.create(
    model="gpt-4o",
    messages=[{
        "role": "user",
        "content": f"Write 5 tweet-length social posts about this blog post. "
                   f"Return as JSON array of strings.\n\n{blog_text}"
    }],
).choices[0].message.content

posts = json.loads(variants)
base = datetime.datetime(2026, 4, 17, 9, 0)

for i, text in enumerate(posts):
    schedule = (base + datetime.timedelta(days=i)).isoformat() + "Z"
    requests.post(
        "https://poststash.com/api/posts",
        headers={"Authorization": "Bearer ps_live_YOUR_KEY"},
        json={"platforms": ["x", "threads"], "text": text, "schedule": schedule},
    )

Five posts queued in a single script run.

3. 5-Star Reviews → Social Proof

Connect your review platform (G2, Trustpilot, App Store, or a custom Zapier trigger) to fire a PostStash request whenever a 5-star review lands. Template it however you like:

{
  "platforms": ["x", "threads"],
  "text": "\"{{review.text}}\"\n\n— {{review.author}}, via {{review.source}}\n\nThanks for the kind words 🙏"
}

Authentic social proof, posted automatically, with zero manual copy-paste.

4. ATS → Job Listing Posts

If you post open roles on your ATS (Greenhouse, Lever, Ashby), you can hook into their webhooks and auto-publish each new listing to X and LinkedIn. The post writes itself:

{
  "platforms": ["x"],
  "text": "We're hiring! 🎯\n\n{{job.title}} — {{job.location}}\n\nApply → {{job.url}}"
}

Bonus: schedule it for peak hours instead of whenever HR clicks "publish."

5. AI-Generated Threads

Long-form threads perform well on X. Have your LLM break a topic into 4–6 thread parts, then publish the whole thing in one API call using the posts array format:

{
  "platforms": ["x"],
  "posts": [
    { "text": "Here's what I learned building a social API from scratch 🧵" },
    { "text": "1/ The hardest part isn't posting — it's token management..." },
    { "text": "2/ Every platform has its own rate limiting philosophy..." },
    { "text": "3/ Image handling is where the real complexity hides..." },
    { "text": "4/ If you abstract it right, one endpoint is all you need." }
  ]
}

PostStash chains the thread together and posts each part in order. No manual threading, no "reply to previous tweet" logic in your code.

These are all things you can build in an afternoon with a free PostStash API key and whatever language you're comfortable in. The pattern is always the same: something happens, you POST to /api/posts, and PostStash handles the rest.