The best social media scheduling APIs in 2026
To schedule posts from your own code you need an API that posts to your accounts, reports each account’s result and doesn’t cost more than your app earns. Here are eight, ours included.
| API | Starts at | Platforms | Built for |
|---|---|---|---|
| Postmaxx | $29 a month, API and MCP on every plan | 10 | Your own accounts, from code or an AI agent |
| Ayrshare | $149 a month (Premium) | 14 | Apps that post for the people who use them |
| Zernio (formerly Late) | First 2 accounts free, then $6 per account | 16 | Apps whose users connect accounts under your brand |
| Buffer | $0 on the Free plan (3,000 requests per 30 days) | 12 | Buffer users, through a GraphQL API |
| Postiz | $29 a month, or free to host yourself | More than 30 | REST and webhooks, open source |
| Post Bridge | $39 a month | 10 | Your own accounts, with MCP and a CLI |
| Publer | Business plan, $10 per account a month | 13 | Up to 500 posts in one call |
| Hootsuite | A plan from $99 per person a month, and an approved developer account | 10, but not TikTok, YouTube or Bluesky by API | Teams already on Hootsuite |
What to check
- The price at your number of accounts, not the starting price.
- Whether each account’s result comes back, with the reason when one fails.
- Whether a retried request can post twice. With Postmaxx, send an Idempotency-Key and a retry never makes a second post.
- Video: size limits and whether TikTok and YouTube are in the API, not only in the app.
Postmaxx’s API
Create a key in Integrations › Your agent, then post to any of your connected accounts. Every route is in the OpenAPI file, and the same key works with the MCP server.
Upload a picture and queue a post
KEY=pmx_…
curl -s https://postmaxx.io/api/v1/accounts -H "Authorization: Bearer $KEY"
curl -s -X POST https://postmaxx.io/api/v1/media/import -H "Authorization: Bearer $KEY" \
-H "Content-Type: application/json" -H "Idempotency-Key: import-launch-1" \
-d '{"url":"https://example.com/launch.jpg","altText":"Launch day"}'
curl -s -X POST https://postmaxx.io/api/v1/posts -H "Authorization: Bearer $KEY" \
-H "Content-Type: application/json" -H "Idempotency-Key: launch-post-1" \
-d '{"text":"We launched.","mediaIds":["med_…"],"targets":[{"accountId":"acc_…"}],"schedule":{"mode":"queue"}}'We make Postmaxx. Other products’ prices and features were checked on their own pages on 25 September 2026; they change, so the sources are linked.