TikTok growth API · MCP server

See what’s working on TikTok. Post your version.

postpeg finds the TikToks over-performing in your niche, breaks down why they worked, writes your version, posts it, and tells you if it beat them. One API and MCP server, so your agent can run the loop for you.

Start 7-day trial How it works

1 niche, 10 breakdowns, 10 scripts and 3 carousels free for 7 days · no card to start · docs open to everyone

One prompt

Ask your agent. It does the research.

Connect https://mcp.postpeg.com/mcp to Claude, ChatGPT or your own agent. It calls the same endpoints you would, and answers with real videos, not guesses.

Find this week's top 5 TikToks
in my "Specialty coffee" niche.
Tell me why the best one worked,
then write my version and tell me
when to post it.

{
  "data": [
    {
      "id": "7429108866120059158",
      "author": {
        "handle": "smallbatchroaster"
      },
      "views": 412000,
      "author_median_views": 9800,
      "outlier_score": 42,
      "matched": "#pourover",
      "slides": 7,
      "format": "list"
    }
  ],
  "refreshed_at": "2026-09-30T04:12:09Z"
}

Example responses, shortened.

How it works

Find it, understand it, write it, post it, measure it

Five steps, each one API call or MCP tool. Run them by hand or let an agent loop.

Step 1: Watch a niche
Name competitors, keywords and hashtags, or paste your website and let postpeg propose them. Every source refreshes daily.
POST /v1/tiktok/niches
Step 2: Find the outliers
Videos ranked by views ÷ the creator’s usual views, so a small account’s breakout ranks above a big account’s average day. See TikTok competitor analysis.
GET /v1/tiktok/niches/{id}/top
Step 3: See why it worked
The hook from the first 3 seconds, the format, the call to action and 2–4 plain reasons, read from the transcript and caption.
POST /v1/tiktok/breakdowns
Step 4: Write your version
A hook, the beats, a call to action and a caption, in the same format and length and in your brand’s voice. Start from a breakdown, or from an idea. Or get it as a photo carousel.
POST /v1/tiktok/scripts
Step 5: Post it and know if it won
Publish to TikTok with inspired_by. At 24 hours and 7 days, postpeg says where your post landed against the niche.
GET /v1/posts/{id}/benchmark

Also included

Around the loop, handled

Photo carousels

An educational TikTok slideshow from a breakdown or an idea, styled after what your niche saves on Pinterest. postpeg sets the words itself, so every one is exact and editable, then posts it as a photo post.

Find creators

Micro-influencers who post in your niche and your customers’ language, with their engagement rate, usual views, where they’re based and how well they fit your product. Where their viewers are, by country, is one click away.

Brand onboarding

Paste a website or App Store link. postpeg proposes niches, keywords, hashtags and real competitor accounts, in the brand’s own language.

Best times to post

The hours when your niche’s over-performing videos went up, in your time zone, from the last 30 days. Read from the niche, so it works from day one.

Weekly report

Every Monday: the week’s five best videos per niche with why they worked, what they had in common, how your posts did, and one thing to try next.

Built for agents

Every step is an MCP tool: list_niches, find_top_tiktoks, break_down_tiktok, write_tiktok_script, make_tiktok_carousel, find_tiktok_creators, create_post, benchmark_post. One prompt runs the whole loop.

TikTok posting

Post a video or a photo carousel now or on a schedule, with retries, checked against TikTok’s rules before it’s sent.

POST /v1/posts

TikTok first. Everywhere else too.

postpeg also posts to Instagram, YouTube, LinkedIn and more through your own Zernio account (its first 2 accounts are free): the same POST /v1/posts, the same checks and retries. See the posting API and how accounts connect.

Plans

Pay for niches and insight, not posts

Every account starts with a 7-day trial, no card: 1 niche with up to 3 competitors, 10 breakdowns, 10 scripts, 3 carousels and 3 connected accounts. On the trial a niche is fetched once, when you create it; paid plans refresh it daily. When the trial ends the API answers 402 subscription_required until you pick a plan. At a limit it answers 402 limit_reached; there are no overage charges.

Starter
One brand, one niche
$29per month
- 1 niche watched daily
- Up to 10 competitors per niche
- 100 “why it worked” breakdowns a month
- 100 scripts written for you a month
- 5 photo carousels made for you a month
- 4 creator searches and 15 audience lookups a month
- Best times to post, weekly report and benchmarks
- TikTok posting · 10 connected accounts
- Unlimited posts, scheduling, analytics, comments and DMs
Start 7-day trial
Pro
Recommended
A brand with several angles
$79per month
- 5 niches watched daily
- Up to 10 competitors per niche
- 500 “why it worked” breakdowns a month
- 500 scripts written for you a month
- 20 photo carousels made for you a month
- 8 creator searches and 20 audience lookups a month
- Best times to post, weekly report and benchmarks
- TikTok posting · 50 connected accounts
- Unlimited posts, scheduling, analytics, comments and DMs
Start 7-day trial
Scale
Agencies and agent builders
$199per month
- 15 niches watched daily
- Up to 10 competitors per niche
- 1,500 “why it worked” breakdowns a month
- 1,500 scripts written for you a month
- 45 photo carousels made for you a month
- 12 creator searches and 22 audience lookups a month
- Best times to post, weekly report and benchmarks
- TikTok posting · unlimited connected accounts (fair use: up to 150 accounts)
- Unlimited posts, scheduling, analytics, comments and DMs
Start 7-day trial

Also posts to Instagram, YouTube, LinkedIn and more through your own Zernio account (its first 2 accounts are free); Zernio bills those accounts to you, not us. X opens on a paid plan. Prices are in US dollars, billed monthly. Payments, invoices and sales tax are handled by Polar, our merchant of record. Plans renew each month until you cancel, and a cancellation takes effect at the end of the period you’ve paid for. Subscribing means you accept the Terms of Service and Acceptable use policy; the Privacy policy explains what data we process.

Questions

Asked before signing up

What is an outlier score?

Views divided by the creator’s median views over their recent videos. A score of 10 means the video did ten times what that creator usually gets, which is a stronger signal of a repeatable idea than raw views.

Can I post to Instagram, YouTube or LinkedIn too?

Yes. Other networks run on your own Zernio account: add its API key once, and the same POST /v1/posts works there. Zernio’s first 2 accounts are free, and Zernio bills those accounts to you.

Does it work with Claude, ChatGPT and other agents?

Yes. The MCP server exposes every step as a tool, and the REST API works from any HTTP client or agent that can call one.

What happens at a plan limit?

The call answers 402 limit_reached and nothing is charged. There are no overage fees; upgrade or wait for the next month.

Does it write the video for me?

It writes the script: a hook, the beats after it, a call to action and a caption with hashtags, in your brand’s voice. You record the video and post it; postpeg posts to TikTok natively and can then benchmark it. For posts without filming, it makes photo carousels: the slides, caption and hashtags, ready to post.

When should I post?

Best times to post reads when the over-performing videos in your niche were posted over the last 30 days, in your time zone. It comes from the niche, not from your own account history, and it says when there is too little data to trust.

Docs

Start with the quickstart

The docs are public and written for people wiring postpeg into a product or an agent: every request, every response, every error.

QuickstartFrom a key to a published postGet a key, create a profile, connect an account and publish, in a handful of requests with curl or fetch. No account needed to read.Read the quickstart

Looking for every endpoint and field? Open the API reference.

Integrations

Works with n8n, Make, Zapier and AI agents (MCP)

The no-code guides use each tool’s own HTTP step, which works today. See every integration

Blog

From the blog

All posts

See what’s working on TikTok. Post your version.

Ask your agent. It does the research.

Find it, understand it, write it, post it, measure it

Step 1: Watch a niche

Step 2: Find the outliers

Step 3: See why it worked

Step 4: Write your version

Step 5: Post it and know if it won