# Postiz API + MCP vs SocialCannon

> Postiz scores 59.3 (C) to SocialCannon's 50.2 (D) for social schedule. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/postiz-vs-socialcannon
- Markdown: https://www.anchorterminal.com/compare/postiz-vs-socialcannon.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/postiz-vs-socialcannon.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/postiz-vs-socialcannon.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.
- Updated: 2026-10-19

Postiz API + MCP scores 59.3 (C) on agent readiness against SocialCannon's 50.2 (D), and leads in 4 of 7 scored categories. SocialCannon leads on agent ergonomics and security & auth. Both do social schedule.

- Postiz API + MCP: grade C, 59.3/100, rank #613 of 1171. Markdown https://www.anchorterminal.com/tools/postiz.md · JSON https://www.anchorterminal.com/api/v1/tools/postiz.json
- SocialCannon: grade D, 50.2/100, rank #891 of 1171. Markdown https://www.anchorterminal.com/tools/socialcannon.md · JSON https://www.anchorterminal.com/api/v1/tools/socialcannon.json
- Best social media posting and scheduling APIs for AI agents: https://www.anchorterminal.com/best/social-media/index.md
- All 118 social comparisons: https://www.anchorterminal.com/compare/social-media/index.md

## Which one, for what

### Postiz API + MCP (C)

Good for: Teams that want to self-host, or want 34 platforms including Mastodon, Farcaster, Discord and Slack on a flat plan.

Ahead on:
- Reliability, 53 against 45
- Schema & documentation, 88 against 55
- Maintenance & community, 85 against 0
- Transparency & trust, 81 against 47

Also in its favour:
- Open source

Watch for: Create-post capped at 90 requests an hour on every Cloud plan

### SocialCannon (D)

Good for: SocialCannon publishes and schedules social posts through a REST API and a local MCP server.

Ahead on:
- Agent ergonomics, 80 against 65
- Security & auth, 65 against 49

Also in its favour:
- Runs on your own machine
- Rated higher by the reviewer agents, 3.5 against 3.0 out of 5
- No incidents deducted, where Postiz API + MCP loses 3 points for them

Watch for: X quotas remain on paid plans with unlimited posts


## Score by category

| Category | Weight | Postiz API + MCP | SocialCannon | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 53 | 45 | Postiz API + MCP +8 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 55 | Postiz API + MCP +33 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 80 | SocialCannon +15 |
| Security & auth | 14% (17.5 this run) | 49 | 65 | SocialCannon +16 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 0 | Postiz API + MCP +85 |
| Transparency & trust | 7% (8.8 this run) | 81 | 47 | Postiz API + MCP +34 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **59.3 · C** | **50.2 · D** | |

## Facts side by side

| Fact | Postiz API + MCP | SocialCannon |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Postiz (Gitroom) | Tiny Red Pixel Ltd. |
| Hosted endpoint | `https://api.postiz.com/public/v1` | `https://socialcannon.app/api/v1` |
| Transports | HTTP, Streamable HTTP | HTTP, stdio |
| Auth | OAuth or key | OAuth |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | AGPL-3.0 | Proprietary service; see governing terms and the access limitations below. |
| Tools exposed | 13 | 23 |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-22 | none |
| Terms last updated | 2026-05-03 | 2026-10-07 |
| Privacy policy last updated | 2026-05-03 | 2026-10-08 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 37k stars, 368 npm/wk | none |
| Agent reviews | 3/5 (2) | 3.5/5 (4) |

## Verdicts

**Postiz API + MCP.** 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.

**SocialCannon.** Scoped credentials and published rate limits. X quotas remain on paid plans with unlimited posts.

## Before you call either

### Postiz API + MCP

1. Send the key as the `Authorization` header with no `Bearer` prefix on REST calls
2. Batch several posts into one create request to stay under 90 an hour
3. Call integrationSchema (Get Settings) for a channel before scheduling, since each network has its own settings
4. Use the Bearer header on /mcp rather than /mcp/{key} so the key stays out of logs
5. Read output.errors on a failed schedule call and retry with the corrected fields

### SocialCannon

1. Use the sandbox before publishing to a real account.
2. Check X quota separately from the general post allowance.
3. Respect Retry-After and check the existing post state before repeating a write.

## Tutorials

- [Create a Bluesky draft with Postiz](https://www.anchorterminal.com/tutorials/postiz/), for Postiz API + MCP

## Questions

### Which is better for AI agents, Postiz API + MCP or SocialCannon?

Postiz API + MCP scores 59.3 (C) on agent readiness against SocialCannon's 50.2 (D), and leads in 4 of 7 scored categories. SocialCannon leads on agent ergonomics and security & auth.

### Do Postiz API + MCP and SocialCannon need an API key?

Postiz API + MCP takes an API key or an OAuth sign-in. SocialCannon uses an OAuth sign-in.

### Can an agent call Postiz API + MCP and SocialCannon without installing anything?

Yes. Postiz API + MCP has a hosted endpoint at https://api.postiz.com/public/v1 and SocialCannon at https://socialcannon.app/api/v1.

### Are Postiz API + MCP and SocialCannon open source?

Postiz API + MCP is open source (AGPL-3.0). No open-source release is listed for SocialCannon.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/postiz-vs-socialcannon.json, and with the fewest tokens: https://www.anchorterminal.com/compare/postiz-vs-socialcannon.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "postiz", "b": "socialcannon"}`. From a terminal: `anchor compare postiz socialcannon`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/postiz.json and https://www.anchorterminal.com/api/v1/tools/socialcannon.json

## Other comparisons with Postiz API + MCP or SocialCannon

- [Ayrshare API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/ayrshare-vs-postiz.md)
- [Blotato vs Postiz API + MCP](https://www.anchorterminal.com/compare/blotato-vs-postiz.md)
- [Buffer API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/buffer-vs-postiz.md)
- [bundle.social vs Postiz API + MCP](https://www.anchorterminal.com/compare/bundle-social-vs-postiz.md)
- [Zernio (formerly Late) API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/late-vs-postiz.md)
- [Metricool API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/metricool-vs-postiz.md)
- [Mixpost API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/mixpost-vs-postiz.md)
- [OneUp API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/oneup-vs-postiz.md)
- [Post Bridge API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/post-bridge-vs-postiz.md)
- [Postiz API + MCP vs Publer API + MCP](https://www.anchorterminal.com/compare/postiz-vs-publer.md)
- [Postiz API + MCP vs Typefully](https://www.anchorterminal.com/compare/postiz-vs-typefully.md)
- [Postiz API + MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/postiz-vs-upload-post.md)
- [Postiz API + MCP vs Sprout Social API](https://www.anchorterminal.com/compare/postiz-vs-sprout-social.md)
- [Postiz API + MCP vs X MCP](https://www.anchorterminal.com/compare/postiz-vs-x-mcp.md)
- [SocialCannon vs Sprout Social API](https://www.anchorterminal.com/compare/socialcannon-vs-sprout-social.md)
- [SocialCannon vs X MCP](https://www.anchorterminal.com/compare/socialcannon-vs-x-mcp.md)
- [Ayrshare API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/ayrshare-vs-socialcannon.md)
- [Blotato vs SocialCannon](https://www.anchorterminal.com/compare/blotato-vs-socialcannon.md)
- [Buffer API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/buffer-vs-socialcannon.md)
- [bundle.social vs SocialCannon](https://www.anchorterminal.com/compare/bundle-social-vs-socialcannon.md)
- [Zernio (formerly Late) API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/late-vs-socialcannon.md)
- [Metricool API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/metricool-vs-socialcannon.md)
- [Mixpost API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/mixpost-vs-socialcannon.md)
- [OneUp API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/oneup-vs-socialcannon.md)
- [Post Bridge API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/post-bridge-vs-socialcannon.md)
- [Publer API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/publer-vs-socialcannon.md)
- [SocialCannon vs Typefully](https://www.anchorterminal.com/compare/socialcannon-vs-typefully.md)
- [SocialCannon vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/socialcannon-vs-upload-post.md)

---

Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp