Best Social Media Scheduling APIs Compared (2026)
2026 comparison of social media scheduling APIs — Postproxy, Ayrshare, and Zernio — pricing, platforms, and developer experience.
The main social media scheduling APIs in 2026 are Postproxy (11 platforms, comments/DMs/reviews APIs, native n8n + MCP, unlimited posts from $17/month), Ayrshare (13 platforms, from $149/month, per-profile pricing), and Zernio (12 social platforms, per-connected-account pricing from $6/account/month). Choose based on platform coverage, pricing model, engagement APIs (comments, DMs, reviews), failure reporting, and automation integrations.
The choice is not obvious
The case for using a unified social media API rather than building direct integrations yourself is clear. The choice of which API is not.
Postproxy, Ayrshare, and Zernio (formerly getlate.dev) all offer some form of unified social publishing. They differ significantly in pricing model, platform coverage, automation integrations, failure handling, and who the product is actually designed for.
This comparison covers the landscape as of September 2026. Postproxy publishes it — we are one of the options being evaluated. Where other tools have genuine advantages, they are noted.
What dimensions should you evaluate when comparing social media APIs?
Platform count. Most tools cover the core set (X, Instagram, LinkedIn, Facebook, Threads, TikTok, YouTube), and Pinterest, Bluesky, and Google Business Profile are now standard too. They differ on the long tail — Reddit, Snapchat — and on messaging channels like WhatsApp and Discord, which are a separate integration from publishing.
Pricing model. Per-profile and per-connected-account pricing scale with every account added — manageable at small counts, hard to forecast when your users connect accounts themselves. Group-based pricing bills the brand rather than every account in it.
Engagement surface. Publishing is half the job. If your product needs to read and reply to comments, handle DMs, or manage Google Business reviews, check whether the API covers the inbound side — and on which platforms.
Per-platform failure reporting. When a request to six platforms produces four successes and two failures, does the API tell you which two failed and why? Or does it return a single status? For automated workflows, this distinction determines how much error-handling logic you own.
Test environment. Can you develop against the API without connecting real social accounts? A sandbox shortens the integration loop — no OAuth setup on every platform, no test posts landing on production profiles, no burned post quota while you debug.
Automation integrations. Native n8n and Zapier nodes reduce setup friction. A Model Context Protocol (MCP) server matters if you are building AI agent workflows.
Rate limits. API call limits sized for human-paced scheduling workflows can become a bottleneck in high-frequency automated pipelines.
Postproxy
Postproxy is a unified API covering the full publishing cycle through a single key: scheduling and publishing, comments, DMs, reviews, profile analytics, and webhook events.
Reliability is the design priority. Transient platform errors are retried automatically, partial success is reported per platform instead of collapsed into a single error, and the n8n node and MCP server are first-party rather than community-maintained.
Platforms: Instagram, Facebook, Threads, TikTok, X (Twitter), YouTube, LinkedIn, Pinterest, Bluesky, Telegram, Google Business Profile — 11 publishing platforms, plus WhatsApp Business for two-way messaging.
Engagement APIs: The inbound side runs through the same key as publishing:
- Comments — list, reply, and moderate (hide, delete, like) on Instagram, Facebook, Threads, YouTube, and LinkedIn
- Direct messages — send and receive on WhatsApp Business, Facebook Messenger, Instagram, Telegram, and Bluesky, including WhatsApp message templates and interactive buttons, quick replies and buttons on Meta platforms, and comment-to-DM private replies
- Reviews — read and reply to Google Business Profile reviews and Facebook Page recommendations, with a webhook firing for each new review
Google Business, the full stack: Most APIs stop at publishing a local post. Postproxy also covers events, offers, and gallery photos, manages the Business Profile itself — opening hours, attributes, services, food menus, place action links — handles reviews per location, and pulls location analytics.
Pricing: Every paid plan includes unlimited posts and engagements. There are two models, matched to who is doing the publishing:
| Plan | Base price | Included | Additional units |
|---|---|---|---|
| Agentic | $17/mo | 5 connected profiles | $4/profile, dropping to $1 at 101+ |
| Business | $49/mo | 20 profile groups | $2/group, dropping to $1.25 at 251+ |
| Enterprise | $399/mo | 300 profile groups | $1/group; adds SSO, SAML, priority support |
You can start free with 10 posts to try the API before picking a plan — no credit card.
The Agentic plan bills per connected profile — for AI agents and automations managing a set of accounts.
Business and Enterprise bill per profile group. A group maps to one brand, client, or publishing setup and holds up to 11 connected platforms, so an agency’s 550 accounts organized as 50 client brands cost $109/month, not 550 line items. Groups are counted at the end of each billing period, so adding a client mid-cycle doesn’t trigger surprise charges.
Developer sandbox: Included on every plan. Sandbox profile groups hold simulated accounts on all 11 platforms — connected in one click, no OAuth flow, no real social accounts. Sandbox posts go through the same API surface and return realistic per-platform responses, post IDs, stats, and comments, but never reach a real platform and don’t count against plan limits.
In practice this makes integration work several times faster: you test publishing, error handling, and webhooks in minutes instead of setting up test accounts on every network and burning real posts to debug.
Per-platform failure reporting: Yes. Each platform in a request returns an individual status. Partial success is a first-class result, not an error state. Your system knows exactly what succeeded, what failed, and why without parsing a combined error.
Automation: Native n8n node, MCP server for AI agent integration, Zapier support, webhooks.
Auth: API key. OAuth flows to each platform are handled on the infrastructure side; you access everything through your key. By default users connect through Postproxy’s platform apps, so there are no app reviews on your side.
Full BYOK (bring your own keys) is also supported — connect users through your own platform apps for a fully branded OAuth experience where every consent screen shows your name.
Rate limits: Posts are unlimited on paid plans; platform quotas still apply — X is capped at 20 posts per 24 hours per account, with pay-as-you-go and BYOK options for higher X throughput.
Weakness: Eleven platforms vs Ayrshare’s thirteen — if you need Reddit or Snapchat today, that is a real constraint.
A dashboard exists for connecting profiles, composing and scheduling posts, and inspecting activity, but Postproxy is API-first — engineering effort goes into the API surface, not the calendar UI. If your team’s primary need is a polished content calendar app for non-technical users, a dashboard-led product will fit better.
Ayrshare
Ayrshare is the most established developer-facing option in this space, predating most alternatives. It supports the widest platform set and has an active developer community.
Platforms: 13 — LinkedIn, Instagram, X, Facebook, YouTube, Bluesky, Threads, Pinterest, Reddit, Telegram, TikTok, Google Business Profile, Snapchat.
Pricing:
| Plan | Price | Profiles |
|---|---|---|
| Premium | $149/mo | 1 profile/brand |
| Launch | $299/mo | Up to 10 profiles |
| Business | $599/mo | 30 profiles; then $8.99/profile up to 100, $3.49 up to 500, $2.49 beyond |
| Enterprise | Custom | Thousands |
Per-profile pricing is the dominant model. At low profile counts it is manageable. At scale — agencies, multi-tenant SaaS products, automated workflows touching many accounts — it compounds quickly.
Engagement APIs: Yes. Comment management across the major networks, DM/messaging endpoints, and a Reviews API covering Facebook and Google Business Profile reviews.
Per-platform failure reporting: Yes. The post response includes a postIds array with a status and id per platform, and an errors array with per-platform failure details including error code, message, and platform identifier. This is well-designed for automated error handling.
Automation: SDKs for Node.js and Python. Zapier integration. n8n is not natively supported — use via HTTP request node. MCP servers are available — a read-only documentation server and an action server for driving the API.
Auth: API key. The Business plan adds multi-user/multi-tenant management for SaaS use cases.
Rate limits: “Expanded API rate limits” on Launch tier and above vs. Premium, but exact numbers are not published.
Weakness: Pricing model is the primary friction. A SaaS product with multi-tenant social publishing, or an agency managing dozens of brands, hits expensive territory quickly on per-profile pricing. No native n8n integration.
Full head-to-head: Ayrshare vs Postproxy.
Zernio (zernio.com)
Zernio (formerly getlate.dev) is a developer-first scheduling API with broad reach: 12 social platforms plus messaging channels and ad network management. Every feature is included at every level — the variable is how many accounts are connected.
Platforms: 12 social — X/Twitter, Instagram, TikTok, LinkedIn, Facebook, YouTube, Threads, Reddit, Pinterest, Bluesky, Snapchat, Google Business — plus WhatsApp, Telegram, and Discord messaging, and six ad networks.
Pricing: Per connected social account, graduated:
| Connected accounts | Price per account/month |
|---|---|
| 1–2 | Free |
| 3–10 | $6 |
| 11–100 | $3 |
| 101–2,000 | $1 |
| 2,001+ | Custom |
Posts are unlimited and all features are included. X/Twitter API calls carry pass-through charges on top ($0.005–$0.200 per request depending on call type), and WhatsApp requires a dedicated phone number from $2/month.
The catch is predictability. Your bill is not a plan you chose — it is a function of how many accounts are connected at any given moment. For a multi-tenant SaaS where users connect their own accounts, every signup moves the invoice, and a burst of signups (including users who connect accounts and then churn) generates charges you did not budget for.
The X pass-through fees add per-request variance on top: forecasting your cost means forecasting both account growth and API call volume.
Engagement APIs: Yes, broad. Comments across eight platforms, DMs across nine channels including WhatsApp and SMS, a unified inbox with reviews, and comment-to-DM automation on Instagram and Facebook.
Per-platform failure reporting: Yes. The API returns per-platform results with failure detail for each target.
Automation: Official n8n community node. MCP server for AI agent integration. Webhooks supported.
Auth: API key. Users connect their social accounts via OAuth; the API uses bearer token authentication.
Weakness: The pricing model. Per-account billing is cheap to start and hard to forecast at scale — 150 connected accounts run roughly $368/month and 550 accounts roughly $768/month, where group-based pricing bills the brand instead of every account in it: the same 550 accounts organized as 50 brands run $109/month on Postproxy’s Business plan.
Add the X pass-through fees and the monthly bill depends on user behavior you do not control.
Full head-to-head: Zernio vs Postproxy.
Comparison table
| Postproxy | Ayrshare | Zernio | Post For Me | Blotato | |
|---|---|---|---|---|---|
| Platforms | 11 | 13 | 12 social (+ messaging, ads) | 9 | 9 |
| Starting price | $0 free | $149/mo | Free (1–2 accounts) | $10/mo | $29/mo |
| Pricing model | Per profile (Agentic) or per profile group (Business+) | Per-profile | Per connected account (graduated) | Per-post volume tiers | AI credits + accounts |
| Unlimited posts from | $17/mo | N/A | Included, but bill grows per account | Not available (caps at 200K) | Not applicable — credit-metered |
| Predictable monthly bill | Yes — bills brands (groups), not every account | Grows per profile | Grows per account + X pass-through fees | Yes — fixed by tier | Depends on AI usage |
| Developer sandbox | Yes | No | No | No | No |
| Per-platform failure detail | Yes | Yes | Yes | Not documented | Not documented |
| Comments API | Yes | Yes | Yes | Not documented | Not documented |
| DMs API | Yes | Yes | Yes | Not documented | Not documented |
| Reviews API | Yes | Yes | Yes | Not documented | Not documented |
| Google Business profile management (hours, menus, attributes) | Yes | Not documented | Not documented | Not documented | Not documented |
| n8n native | Yes | No | Yes | No | Yes |
| MCP server | Yes | Yes | Yes | Yes | Yes |
| Zapier | Yes | Yes | Yes | No | Coming soon |
| Developer-first | Yes | Yes | Yes | Yes | No — creator-first |
Post For Me and Blotato solve narrower slices: Post For Me is a pure per-post volume API with BYOK white-labelling and no free tier, and Blotato is an AI content engine where publishing is one feature among eight. Full breakdowns for both, plus Publer, SocialBee, and Postiz, are on the comparison hub.
How do you choose the right social media scheduling API?
Use Postproxy if you are building automated publishing workflows, need the inbound side — comments, DMs, and Google Business reviews — through the same key, want a sandbox to develop against before connecting real accounts, use n8n or AI agents in your stack, or want unlimited posts with pricing that bills by brand (profile group) rather than by every connected account.
Use Ayrshare if you need the broadest platform coverage (especially Reddit or Snapchat) and per-profile pricing fits your scale.
Use Zernio if you need platforms nobody else covers — Discord, Reddit, Snapchat — or unified ads management and bundled SMS, and your connected account count is small and stable enough that per-account billing stays predictable.
If you arrived here from Buffer specifically, see Buffer API alternatives for developers — Buffer’s API is gated to higher-tier plans, and that guide walks through the programmable replacements.
Scheduling tool vs publishing infrastructure
The most useful lens for choosing is understanding whether you need a scheduling product or publishing infrastructure.
Scheduling products are designed for human content teams. The API exists to feed a content calendar. They work for automated use cases, but rate limits, pricing tiers, and API design reflect human-paced usage as the primary model.
Publishing infrastructure is designed for systems. The API is the product. Error handling is precise because automated pipelines need to act on failure data. Partial success is explicit because “five platforms succeeded, one failed” is a different operational state than “everything failed.”
Most teams building automation end up wanting infrastructure. Most teams giving a content team a scheduling tool with API hooks end up fine with either.
Start publishing programmatically with the Postproxy API.
Postproxy
One API for every social platform
Publish to Instagram, X, LinkedIn, TikTok, YouTube and more with a single request. Free plan, no credit card required.
