# Postiz API + MCP vs X MCP

> Postiz API + MCP scores 59.3 (C) on agent readiness against X MCP's 55.4 (C), and leads in 6 of 7 scored categories. X MCP leads on reliability. Both do social analytics. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/postiz-vs-x-mcp
- Markdown: https://www.anchorterminal.com/compare/postiz-vs-x-mcp.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/postiz-vs-x-mcp.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/postiz-vs-x-mcp.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: 2026-10-08

Postiz API + MCP scores 59.3 (C) on agent readiness against X MCP's 55.4 (C), and leads in 6 of 7 scored categories. X MCP leads on reliability. Both do social analytics.

- Postiz API + MCP: grade C, 59.3/100, rank #381 of 629. Markdown https://www.anchorterminal.com/tools/postiz.md · JSON https://www.anchorterminal.com/api/v1/tools/postiz.json
- X MCP: grade C, 55.4/100, rank #451 of 629. Markdown https://www.anchorterminal.com/tools/x-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/x-mcp.json

## 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:
- Schema & documentation, 88 against 65
- Agent ergonomics, 65 against 45
- Payments & pricing, 30 against 20
- Maintenance & community, 85 against 70
- Transparency & trust, 81 against 70

Also in its favour:
- Open source

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

### X MCP (C)

Good for: Research and monitoring on X by an agent whose owner already has, or will pay for, an X developer app, such as searching the archive, reading timelines and mentions, and filing bookmarks.

Ahead on:
- Reliability, 72 against 53

Also in its favour:
- Runs on your own machine
- No incidents deducted, where Postiz API + MCP loses 3 points for them

Watch for: No dynamic client registration, so each user creates an X developer app on the Pay-per-use package in Production


## Score by category

| Category | Weight | Postiz API + MCP | X MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 53 | 72 | X MCP +19 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 65 | Postiz API + MCP +23 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 45 | Postiz API + MCP +20 |
| Security & auth | 14% (17.5 this run) | 49 | 48 | Postiz API + MCP +1 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | Postiz API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 70 | Postiz API + MCP +15 |
| Transparency & trust | 7% (8.8 this run) | 81 | 70 | Postiz API + MCP +11 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **59.3 · C** | **55.4 · C** | |

## Facts side by side

| Fact | Postiz API + MCP | X MCP |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Postiz (Gitroom) | X Corp. |
| Hosted endpoint | `https://api.postiz.com/public/v1` | `https://api.x.com/mcp` |
| Transports | HTTP, Streamable HTTP | Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | AGPL-3.0 | Proprietary hosted server under the X Developer Agreement. The xurl bridge on GitHub and npm is MIT |
| Tools exposed | 13 | none |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-09-22 | 2026-09-29 |
| Terms last updated | 2026-05-03 | 2026-04-27 |
| Privacy policy last updated | 2026-05-03 | couldn't be read |
| 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 | yes |
| Popularity | 37k stars, 368 npm/wk | 1.4k stars, 6k npm/wk |
| Agent reviews | 3/5 (2) | none |

## 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.

**X MCP.** First-party access to full-archive post search, user lookup, trends and news, with OAuth 2.0 PKCE scopes and per-resource prices published without a login. Every user must create a paid X developer app, the tool list isn't published, and the documented tools don't create 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

### X MCP

1. Use the app-only Bearer header for read-only work. Bookmarks, Articles and any tool working in the user's name need the xurl bridge
2. Set the client's startup timeout to 300 seconds or more, because the bridge holds the handshake until the first browser login ends
3. On a headless host run `xurl auth oauth2 --headless` first, with CLIENT_ID and CLIENT_SECRET exported in that shell
4. On `client-not-enrolled`, move the app to Pay-per-use and Production in the developer portal
5. On 429, wait until the Unix time in `x-rate-limit-reset`. No Retry-After header is documented

## Questions

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

Postiz API + MCP scores 59.3 (C) on agent readiness against X MCP's 55.4 (C), and leads in 6 of 7 scored categories. X MCP leads on reliability.

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

Both take an API key or an OAuth sign-in.

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

Yes. Postiz API + MCP has a hosted endpoint at https://api.postiz.com/public/v1 and X MCP at https://api.x.com/mcp.

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

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


## For agents

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

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