PostWireDone with yoga before 7am. ☀️ New 6:15am class — 45 mins, first one's free. Save this & show up Monday! 🧘 #morningyoga #yogalife #commuteryoga #6amclub #yogastudio
Post to all social media with one API — with each post written for its network
Every API below posts to several networks through one integration. They differ in what they charge for (accounts, profiles, posts, channels or businesses), in whether there's a free plan, and in whether the API writes the posts for you.
Short answer. PostWire is the API that writes each network's version and publishes it, priced per business with a free plan that includes the API, the MCP server and TikTok. As of Sept 2026, we couldn't find another hosted API that writes a different native post per network from one prompt, in one call. 10 businesses on 5 networks are $29 a month — every network in each post, the writing included.
Every vendor fact below was read on the vendor's own page on Sept 26, 2026; the link is in the table.
Nine posting APIs, one line each
What each charges for, whether there's a free plan, whether it has an MCP server, and whether it writes the posts.
| API | Charges per | Free plan | MCP server | Writes a post per network |
|---|---|---|---|---|
| PostWire | Business — every network connects on every plan; paid plans post to all of them at once | Yes, 1 business, no card | Hosted; API key or OAuth 2.1 | Yes, from one prompt |
| Ayrshare | User profile | No (trial) | Hosted; Bearer key | No |
| Upload-Post | Profile bundles | Yes, no TikTok | Hosted (key or OAuth), and local | From a video, 4 networks |
| Zernio | Connected account | Yes, 2 accounts | Hosted, OAuth or key | No |
| Post for Me | Published post | No | Yes | No |
| Outstand | Published post | No | Hosted, 28 tools | No |
| bundle.social | Post volume | Yes, 20 posts a month | Yes | No |
| Buffer | Channel | Yes, 3 channels | Hosted; one channel per call | No |
| Blotato | Account cap + credits | No (trial without the API) | Hosted, OAuth or key | On request in chat |
Everyone here publishes text you send. “Writes a post per network” means the API itself returns a different native text for each network from one input.
Where PostWire is ahead
- It writes the posts.
POST /api/generatereturns a native draft for every network from one prompt. Every other API in this table publishes text you send; Upload-Post's AI writes captions starting from a video, for four networks. - All or nothing, and safe to retry. Every network in a request is checked first — connection, length, required media — and the request is refused whole if one would fail. An identical post is refused for 2 minutes, or 24 hours with your own
idempotency_key. - A free plan with the API, the MCP server and TikTok. Ayrshare, Post for Me and Outstand list no free plan, Blotato's trial excludes the API, and Upload-Post's free plan leaves TikTok out.
- An MCP server you add to Claude by signing in (OAuth 2.1), in Claude's connector directory. Ayrshare's MCP takes a static Bearer key only.
- Signed webhooks and a public status page.
post.published,post.failedandconnection.reauth_required, HMAC-signed and retried for two days, on every plan; /status/ shows each network's delivery rate over 30 days.
What “post to all” takes with PostWire
Two calls. The first writes; the second publishes (or /api/schedule queues). Over MCP your agent does the same with generate_posts and post_to_social, and the n8n node can do both in one step.
curl -X POST https://postwire.io/api/generate \
-H "Authorization: Bearer $POSTWIRE_API_KEY" -H "Content-Type: application/json" \
-d '{"prompt":"We open a 6:15am class on Monday","platforms":["instagram","linkedin","bluesky"]}'
# returns { "drafts": { "instagram": {"text": …}, "linkedin": {…}, "bluesky": {…} } }
curl -X POST https://postwire.io/api/post \
-H "Authorization: Bearer $POSTWIRE_API_KEY" -H "Content-Type: application/json" \
-d '{"platforms":["instagram","linkedin","bluesky"],"per_platform":DRAFTS,"photo_url":"https://…"}'Before anything goes out, every named network is checked — connection, character limit, required media — and the whole request is refused if one would fail, instead of publishing to some and dropping the rest. Retries are safe: an identical post is refused for 2 minutes, or 24 hours with your own idempotency_key. Full reference: API reference.
One idea in, one post per network out
The first call returns this — one native draft per network, ready to publish with the second.
The idea: Our yoga studio opens a 6:15am class for commuters starting Monday. 45 minutes, done before 7, first class free.
we added a 6:15am yoga class for commuters starting monday. 45 mins, done before 7, first one's free. honestly just tired of hearing "I have no time" — this is the time 😄 #morningyoga #yoga
Real output from PostWire's writer on Sept 26, 2026, not edited (25.2 s for six networks; three shown). You review and edit before anything is published.
10 businesses on 5 networks each: the monthly bill
| Tool | How it's counted | Per month |
|---|---|---|
| PostWire Pro | 10 businesses fit in Pro (10 businesses, unlimited posts, fair use 10,000 a month; 10 × 20 posts × 5 networks = 1,000) | $29 |
| Post for Me | Base plan: up to 1,000 successful posts a month | $10 |
| Outstand | Per post: 3,000 included | $19 |
| Upload-Post Professional | 10 profiles | $50 |
| bundle.social | Pro: 10,000 posts a month, unlimited accounts | $100 |
| Zernio | 50 accounts: 2 free, 8 × $6, 40 × $3 | $168 |
| Buffer Essentials | 50 channels × $6 | $300 |
| Ayrshare Launch | 10 user profiles | $299 |
| Blotato Agency | 50 accounts, over Creator's 40 | $499 |
Monthly billing in USD, about 20 posts per business a month, read on Sept 26, 2026 from each vendor's pricing page (links in the table above). The two cheapest charge per published post and don't write per-network versions; Post for Me also has you bring your own platform credentials.
Sources, all read on Sept 26, 2026:
- Ayrshare pricing: www.ayrshare.com/pricing/
- Upload-Post pricing: www.upload-post.com/pricing
- Zernio pricing: zernio.com/pricing.md
- Post for Me pricing: www.postforme.dev/pricing
- Outstand pricing: www.outstand.so/pricing.md
- bundle.social pricing: bundle.social/pricing
- Buffer pricing: buffer.com/pricing
- Blotato pricing: www.blotato.com/pricing
Questions people ask
Is there an API that posts to all social media at once?
Yes, several: Ayrshare, Upload-Post, Zernio, Post for Me, Outstand, bundle.social, Buffer, Blotato and PostWire all publish to multiple networks through one integration. They differ in pricing unit, networks and whether they write the text.
Which API writes a different post for each network?
PostWire's /api/generate returns a native draft per network from one prompt, and /api/post publishes them. As of Sept 2026, we couldn't find another hosted API that writes a different native post per network from one prompt, in one call. Upload-Post's AI writes captions per network starting from a video, for four networks.
Which networks does PostWire's API post to?
TikTok, Instagram, Facebook Pages, YouTube, LinkedIn personal profiles, Bluesky, Mastodon, Telegram, Discord and X (a pay-per-use add-on of the paid plans). Reddit is not available yet. TikTok and Meta use PostWire's approved apps, so you don't file your own app review.
What's the cheapest way to post to many accounts?
When each business is on several networks, per-business pricing: 10 businesses on 5 networks is $29 a month on PostWire, with each network's post written for you and unlimited posts (fair use) included. Per-account and per-channel APIs bill the same setup as 50 units ($168 on Zernio, $300 on Buffer Essentials).
Is there a free plan?
PostWire: yes, 1 business, 20 posts a month, 2 networks per post, no card, API and MCP included. Paid plans have a 14-day refund.
Type one idea and see the post each network gets.
The demo on the home page writes live, with no account, and never publishes. The free plan covers one business — every network connects free, 2 networks per post — with no card and no time limit. Paid plans have a 14-day refund.