# Social media posting and scheduling APIs for AI agents

> 10 social media posting APIs ranked by the Anchor benchmark. Leader Zernio (formerly Late) API + MCP (B). APIs that publish and schedule posts across social networks from one call, and read back comments and analytics. Compared on which networks they reach, which of those need an app review or a business account, price per connected profile, media support, and whether you can host it yourself.

- Canonical: https://www.anchorterminal.com/categories/social-media
- Markdown: https://www.anchorterminal.com/categories/social-media.md (~4,550 tokens)
- Slim: https://www.anchorterminal.com/categories/social-media.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/categories/social-media.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

APIs that publish and schedule posts across social networks from one call, and read back comments and analytics. Compared on which networks they reach, which of those need an app review or a business account, price per connected profile, media support, and whether you can host it yourself.

- Tools ranked: 10 · agent-ready (BB or better): 0 · accept x402: 0 · hosted endpoints: 9 · desk reviews by the panel: 20
- JSON: https://www.anchorterminal.com/api/v1/tools.json (list) · https://www.anchorterminal.com/api/v1/rankings.json (ranked) · https://www.anchorterminal.com/api/v1/x402.json (payable) · https://www.anchorterminal.com/api/v1/capabilities.json (by capability)
- Grades run AA, A, BB, B, C, D, E, F · methodology: https://www.anchorterminal.com/benchmark/

- Capabilities in this category: social.post, social.schedule, social.analytics, social.comments, social.media-upload
- https://letme.dev/social.post picks the top-graded tool in this list and says how to call it direct; calling through letme comes later (https://www.anchorterminal.com/letme/index.md)

## Ranking

| # | Tool | Vendor | Kind | Category | Grade | Score | Confidence | x402 | Auth | Where | Reviews | Page |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 139 | Zernio (formerly Late) API + MCP | Zernio | HTTP API | Social | B | 67.5 | medium | no | OAuth or key | hosted + local | 4/5 (2) | https://www.anchorterminal.com/tools/late.md |
| 220 | Buffer API + MCP | Buffer | HTTP API | Social | B | 62.3 | medium | no | OAuth or key | hosted | 3/5 (2) | https://www.anchorterminal.com/tools/buffer.md |
| 265 | Postiz API + MCP | Postiz (Gitroom) | HTTP API | Social | C | 59.5 | medium | no | OAuth or key | hosted | 3/5 (2) | https://www.anchorterminal.com/tools/postiz.md |
| 275 | Upload-Post API + MCP | Upload-Post | HTTP API | Social | C | 58.9 | medium | no | OAuth or key | hosted + local | 3/5 (2) | https://www.anchorterminal.com/tools/upload-post.md |
| 295 | Ayrshare API + MCP | Ayrshare | HTTP API | Social | C | 57.3 | medium | no | API key | hosted | 2.5/5 (2) | https://www.anchorterminal.com/tools/ayrshare.md |
| 368 | Mixpost API + MCP | Mixpost (Inovector) | HTTP API | Social | D | 49.7 | medium | no | Token | local | 2/5 (2) | https://www.anchorterminal.com/tools/mixpost.md |
| 376 | Post Bridge API + MCP | Post Bridge | HTTP API | Social | D | 48.5 | medium | no | OAuth or key | hosted | 3.5/5 (2) | https://www.anchorterminal.com/tools/post-bridge.md |
| 388 | Publer API + MCP | Publer | HTTP API | Social | D | 47.1 | medium | no | API key | hosted | 3/5 (2) | https://www.anchorterminal.com/tools/publer.md |
| 428 | Metricool API + MCP | Metricool | HTTP API | Social | E | 38.7 | low | no | OAuth or key | hosted | 2.5/5 (2) | https://www.anchorterminal.com/tools/metricool.md |
| 445 | OneUp API + MCP | OneUp | HTTP API | Social | F | 24.8 | medium | no | API key | hosted | 1.5/5 (2) | https://www.anchorterminal.com/tools/oneup.md |

Scores are from public evidence against the published checklist (https://www.anchorterminal.com/benchmark/), with Performance and Task success pending. p95 latency and context cost come from our probes, which haven't run yet.

## Summaries

### 139. Zernio (formerly Late) API + MCP, B (67.5)

Social media and messaging API (formerly Late at getlate.dev, renamed Zernio in 2026) for 16 channels plus ads, inbox, SMS and WhatsApp. Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.

- Page: https://www.anchorterminal.com/tools/late · Markdown: https://www.anchorterminal.com/tools/late.md · JSON: https://www.anchorterminal.com/api/v1/tools/late.json
- Capabilities: social.post, social.schedule, social.analytics, social.comments, social.media-upload · endpoint: `https://zernio.com/api/v1`

### 220. Buffer API + MCP, B (62.3)

Buffer's GraphQL API, reopened to everyone on 2026-05-27 and free on every plan, with a hosted MCP server (20 tools) and a CLI. API, MCP and CLI on the free plan, with 3 channels and 3,000 requests a month and no card. 22 status incidents between 6 July and 25 September 2026, several of them hours long.

- Page: https://www.anchorterminal.com/tools/buffer · Markdown: https://www.anchorterminal.com/tools/buffer.md · JSON: https://www.anchorterminal.com/api/v1/tools/buffer.json
- Capabilities: social.post, social.schedule, social.analytics · endpoint: `https://api.buffer.com`

### 265. Postiz API + MCP, C (59.5)

Open-source social scheduler (AGPL-3.0) for 34 platforms that you can self-host free or use as Postiz Cloud from $29 a month. AGPL-3.0 and self-hostable with the API and MCP included, 34 platforms. Create-post capped at 90 requests an hour on every Cloud plan.

- Page: https://www.anchorterminal.com/tools/postiz · Markdown: https://www.anchorterminal.com/tools/postiz.md · JSON: https://www.anchorterminal.com/api/v1/tools/postiz.json
- Capabilities: social.post, social.schedule, social.analytics, social.media-upload · endpoint: `https://api.postiz.com/public/v1`

### 275. Upload-Post API + MCP, C (58.9)

REST API for publishing video, photos, text and documents to TikTok, Instagram, YouTube and 20 or so other networks, with async uploads, scheduling and analytics. Free plan with 2 profiles and 10 uploads a month, no card. One account key with no scopes, and the MCP's OAuth grants a single mcp.full scope.

- Page: https://www.anchorterminal.com/tools/upload-post · Markdown: https://www.anchorterminal.com/tools/upload-post.md · JSON: https://www.anchorterminal.com/api/v1/tools/upload-post.json
- Capabilities: social.post, social.schedule, social.analytics, social.comments, social.media-upload · endpoint: `https://api.upload-post.com/api`

### 295. Ayrshare API + MCP, C (57.3)

REST and GraphQL API for posting, scheduling, analytics, comments and DMs across 14 social networks, with a hosted MCP server (27 tools) on the same key. Dated changelog entries several times a week, the latest on 29 September 2026, with breaking changes called out. No free plan, and $149 a month to start.

- Page: https://www.anchorterminal.com/tools/ayrshare · Markdown: https://www.anchorterminal.com/tools/ayrshare.md · JSON: https://www.anchorterminal.com/api/v1/tools/ayrshare.json
- Capabilities: social.post, social.schedule, social.analytics, social.comments, social.media-upload · endpoint: `https://api.ayrshare.com/api`

### 368. Mixpost API + MCP, D (49.7)

Self-hosted Laravel package for social scheduling, with a REST API and a built-in MCP server on your own instance. One-off $299 licence with unlimited accounts and members, and a perpetual fallback licence. No API or MCP in the free Lite edition.

- Page: https://www.anchorterminal.com/tools/mixpost · Markdown: https://www.anchorterminal.com/tools/mixpost.md · JSON: https://www.anchorterminal.com/api/v1/tools/mixpost.json
- Capabilities: social.post, social.schedule, social.analytics, social.media-upload

### 376. Post Bridge API + MCP, D (48.5)

Publishing-only scheduler with a REST API, a hosted MCP server and a CLI. Hosted MCP with OAuth 2.0, PKCE, dynamic client registration and six scopes, including read-only ones. Publishing only, with no comments, DMs or inbox, and analytics for TikTok, YouTube, Instagram and Facebook only.

- Page: https://www.anchorterminal.com/tools/post-bridge · Markdown: https://www.anchorterminal.com/tools/post-bridge.md · JSON: https://www.anchorterminal.com/api/v1/tools/post-bridge.json
- Capabilities: social.post, social.schedule, social.analytics, social.media-upload · endpoint: `https://api.post-bridge.com/v1`

### 388. Publer API + MCP, D (47.1)

Scheduler with a REST API and an MCP server that are both limited to the Business and Enterprise plans. Scoped API keys (workspaces, accounts, posts, media, analytics) with 401 and 403 errors that name the missing scope or header. API and MCP only on Business and Enterprise, and the free plan has no API.

- Page: https://www.anchorterminal.com/tools/publer · Markdown: https://www.anchorterminal.com/tools/publer.md · JSON: https://www.anchorterminal.com/api/v1/tools/publer.json
- Capabilities: social.post, social.schedule, social.analytics, social.media-upload · endpoint: `https://app.publer.com/api/v1`

### 428. Metricool API + MCP, E (38.7)

Analytics-first social suite with a large REST API (553 paths) and a hosted OAuth MCP server. Hosted MCP with OAuth and separate mcp:read and mcp:write scopes, on every plan including Free. REST API only on Advanced ($67 a month) and Custom.

- Page: https://www.anchorterminal.com/tools/metricool · Markdown: https://www.anchorterminal.com/tools/metricool.md · JSON: https://www.anchorterminal.com/api/v1/tools/metricool.json
- Capabilities: social.post, social.schedule, social.analytics, social.media-upload · endpoint: `https://app.metricool.com/api`

### 445. OneUp API + MCP, F (24.8)

Social scheduler with a JSON API and a hosted MCP server. API and MCP on every plan from $25 a month ($15 billed yearly). API key in the query string on REST and in the MCP URL, with no scopes.

- Page: https://www.anchorterminal.com/tools/oneup · Markdown: https://www.anchorterminal.com/tools/oneup.md · JSON: https://www.anchorterminal.com/api/v1/tools/oneup.json
- Capabilities: social.post, social.schedule, social.analytics, social.comments, social.media-upload · endpoint: `https://www.oneupapp.io/api`

## Indexed, not reviewed (38)

Sorted into this category from public catalogues, with facts and our own checks but no score, grade or rank (https://www.anchorterminal.com/indexed/index.md).

| Listing | Kind | What it does | Why it's here |
| --- | --- | --- | --- |
| [AdLoop](https://www.anchorterminal.com/tools/getadloop-adloop.md) | MCP server | Google Ads, Reddit Ads, GA4 and Tag Manager in your AI client, with a preview before every change. | vendor's own |
| [ads](https://www.anchorterminal.com/tools/adspirer-ads.md) | MCP server | Manage Google, Meta, Amazon, TikTok, LinkedIn & ChatGPT ads. 430 tools for campaigns & analytics. | vendor's own |
| [altmetric-mcp](https://www.anchorterminal.com/tools/altmetric-mcp.md) | MCP server | MCP server for Altmetric APIs - track research attention across news, policy, social media, and more | vendor's own |
| [CreatorDB](https://www.anchorterminal.com/tools/creatordb-mcp.md) | MCP server | Creator discovery & analytics across YouTube, Instagram, TikTok (30M+) + brand/sponsor intel. | vendor's own |
| [CrustAPI Google + LinkedIn Data](https://www.anchorterminal.com/tools/crustapi-search.md) | MCP server | Live Google + public LinkedIn data: search, maps, profiles, companies, jobs. Pay only for results. | vendor's own |
| [GTM Otto](https://www.anchorterminal.com/tools/gtmotto-linkedin.md) | MCP server | Self-driving LinkedIn prospecting: it sources, warms and invites daily. You approve every message. | vendor's own |
| [gtm-api: LinkedIn MCP Server](https://www.anchorterminal.com/tools/gtm-api-linkedin-mcp.md) | MCP server | Managed LinkedIn MCP server for AI agents: search, connect, message and enrich on accounts you own. | vendor's own |
| [hooka.to MCP server](https://www.anchorterminal.com/tools/hooka-mcp.md) | MCP server | Run TikTok cold-DM outreach from your LLM: senders, campaigns and inbox via the Hooka API. | vendor's own |
| [Kleos](https://www.anchorterminal.com/tools/zurc-kleos.md) | MCP server | Generate, schedule and measure UGC-style TikTok and Instagram posts for your app. | vendor's own |
| [LLM Optimizer](https://www.anchorterminal.com/tools/metavert-llmopt.md) | MCP server | AI brand visibility analytics: visibility scores, optimizations, video, Reddit, and search rankings. | vendor's own |
| [MakeAIVideo](https://www.anchorterminal.com/tools/makeaivideo-video-generator.md) | MCP server | Create AI videos (voiceover, scenes, captions, music) and post them to TikTok, Reels, Shorts and X. | vendor's own |
| [Multi Upload Tool](https://www.anchorterminal.com/tools/multi-upload-tool-mcp.md) | MCP server | Schedule and publish videos to TikTok, YouTube, Instagram and 5 more networks. | vendor's own |
| [mux.com MCP server](https://www.anchorterminal.com/tools/mux-mcp.md) | MCP server | The official MCP Server for the Mux API | vendor's own |
| [Mysocial](https://www.anchorterminal.com/tools/mysocial.md) | MCP server | Social media MCP server: your Instagram, TikTok, YouTube, LinkedIn and Threads history for your AI. | vendor's own |
| [opentweet.io MCP server](https://www.anchorterminal.com/tools/opentweet-mcp.md) | MCP server | Manage your Twitter/X presence from any AI assistant — schedule, threads, and more | vendor's own |
| [parlayx.com MCP server](https://www.anchorterminal.com/tools/parlayx-mcp.md) | MCP server | Read your ParlayX account and the prediction markets from an MCP client. | vendor's own |
| [PeepTrend: YouTube Gaming Trend Finder](https://www.anchorterminal.com/tools/peeptrend-youtube-gaming-trend-finder.md) | MCP server | Find rising Steam games and YouTube content opportunities before the niche gets crowded. | vendor's own |
| [Planify](https://www.anchorterminal.com/tools/planifyapps-planify.md) | MCP server | Schedule and publish social posts to Twitter, Instagram, LinkedIn, Pinterest, Bluesky and more. | vendor's own |
| [PostLake](https://www.anchorterminal.com/tools/postlake-social.md) | MCP server | Post, schedule, reply and measure across X, LinkedIn, Instagram, TikTok, YouTube, Threads, Bluesky | vendor's own |
| [Postproxy](https://www.anchorterminal.com/tools/postproxy.md) | MCP server | Publish, schedule, and manage social media posts across major platforms via the Postproxy API. | vendor's own |
| [Publora](https://www.anchorterminal.com/tools/publora-mcp-server.md) | MCP server | Schedule and publish to 10 social platforms: LinkedIn, X, Instagram, TikTok, YouTube, and more. | vendor's own |
| [Reddit Trends MCP](https://www.anchorterminal.com/tools/trendsmcp-reddit.md) | MCP server | Reddit trend data over time, with growth for any topic or brand. Free key at trendsmcp.ai | vendor's own |
| [rolli.ai MCP server](https://www.anchorterminal.com/tools/rolli-mcp.md) | MCP server | Social media search, expert discovery, and analytics across X, Reddit, YouTube, and more | vendor's own |
| [Runsheet YouTube Scheduler](https://www.anchorterminal.com/tools/buildifyapp-youtube-scheduler.md) | MCP server | Schedule, publish and retitle YouTube videos, plan the month with AI, and upload from your machine. | vendor's own |
| [SalesTouch](https://www.anchorterminal.com/tools/salestouch.md) | MCP server | Give AI agents the LinkedIn tools to find, qualify, engage, and follow up with prospects. | vendor's own |
| [socialapi](https://www.anchorterminal.com/tools/social-api-socialapi.md) | MCP server | MCP server for SocialAPI — manage social media comments, DMs, reviews, and mentions across platforms | vendor's own |
| [Sociality.io MCP](https://www.anchorterminal.com/tools/sociality-mcp.md) | MCP server | Social media analytics, post insights, and competitor benchmarking for AI agents. | vendor's own |
| [socialneuron.com MCP server](https://www.anchorterminal.com/tools/socialneuron-mcp-server.md) | MCP server | 52 MCP tools for AI social media: create, distribute, analyze, and optimize content. | vendor's own |
| [ssave.cc — TikTok & Instagram Downloader](https://www.anchorterminal.com/tools/ssave-tiktok-instagram-downloader.md) | MCP server | Extract & download TikTok, Instagram, YouTube, Douyin media — HD, no watermark, MP3 export | vendor's own |
| [Ssemble AI Clipping](https://www.anchorterminal.com/tools/ssemble-mcp-server.md) | MCP server | Create AI-powered short-form video clips from YouTube videos. Supports webhook callbacks. | vendor's own |
| [TikTok Ads](https://www.anchorterminal.com/tools/getmcpads-tiktok-ads.md) | MCP server | TikTok Ads MCP server: 35 read tools, 29 opt-in preview-first writes. | vendor's own |
| [TikTok Trends API](https://www.anchorterminal.com/tools/trendsapi-tiktok.md) | MCP server | TikTok hashtag volume over time, with growth for any hashtag. Free key at trendsapi.ai | vendor's own |
| [TikTok Trends MCP](https://www.anchorterminal.com/tools/trendsmcp-tiktok.md) | MCP server | TikTok hashtag volume over time, with growth for any hashtag. Free key at trendsmcp.ai | vendor's own |
| [TokPortal](https://www.anchorterminal.com/tools/tokportal-mcp.md) | MCP server | Managed TikTok/Instagram/YouTube accounts + video posting at scale, operated by human managers. | vendor's own, widely used |
| [VidLet](https://www.anchorterminal.com/tools/vidlet.md) | MCP server | Edit video by asking: auto-captions, jump cuts, narrated Shorts, GIFs, voiceover, YouTube upload. | vendor's own |
| [wix.com MCP server](https://www.anchorterminal.com/tools/wix-mcp.md) | MCP server | A Model Context Protocol server for Wix AI tools | vendor's own |
| [Xtracticle](https://www.anchorterminal.com/tools/xtracticle.md) | MCP server | Read public X (Twitter) posts, threads and X Articles as clean Markdown. Read-only, no auth. | vendor's own |
| [YouTube Trends API](https://www.anchorterminal.com/tools/trendsapi-youtube.md) | MCP server | YouTube search volume and trending videos over time. Free key at trendsapi.ai | vendor's own |