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Head to head · Social posting · October 2026 research run

bundle.social vs Postiz API + MCP

bundle.social and Postiz API + MCP score within a point of each other on agent readiness, 60.1 (C) and 59.3 (C). Postiz API + MCP leads on security & auth, maintenance & community and transparency & trust. Both do social posting.

Best social media posting and scheduling APIs for AI agents · All 103 social comparisons

bundle.socialBUNDLE SP. Z O.O. · HTTP API C60.1/100#530 of 950 Postiz API + MCPPostiz (Gitroom) · HTTP API C59.3/100#552 of 950

Which one, for what

bundle.social C

Good for A SaaS product or agent that manages many accounts for many customers, since paid plans do not charge per connected account and teams separate tenants.

Ahead on

  • Reliability, 63 against 53
  • Payments & pricing, 35 against 30

Also in its favour

  • Runs on your own machine
  • Free to start without a card
  • No incidents deducted, where Postiz API + MCP loses 3 points for them

Watch for

API keys are organisation-wide with no scopes or read-only mode found, so one key reaches every team and connected account

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

  • Security & auth, 49 against 34
  • Maintenance & community, 85 against 78
  • Transparency & trust, 81 against 65

Also in its favour

  • Open source

Watch for

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

Score by category

CategoryWeight this runbundle.socialPostiz API + MCPEdge
Reliability16%206353bundle.social +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28688Postiz API + MCP +2
Agent ergonomics13%16.26665bundle.social +1
Security & auth14%17.53449Postiz API + MCP +15
Payments & pricing10%12.53530bundle.social +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87885Postiz API + MCP +7
Transparency & trust7%8.86581Postiz API + MCP +16
Negative events≤150-3
Total60.1 · C59.3 · C

Facts side by side

Factbundle.socialPostiz API + MCP
KindHTTP APIHTTP API
VendorBUNDLE SP. Z O.O.Postiz (Gitroom)
Hosted endpointhttps://api.bundle.social/api/v1https://api.postiz.com/public/v1
TransportsHTTP, stdioHTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingFreemiumPaid
Price for social posting$0.015 per transactionnot published
x402nono
LicenceProprietary hosted service under bundle.social's terms of service. The TypeScript SDK, the CLI and the MCP server on GitHub are MITAGPL-3.0
Tools exposed6813
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-062026-09-22
Terms last updated2026-07-142026-05-03
Privacy policy last updated2026-07-022026-05-03
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularity2 stars, 4.1k npm/wk37k stars, 368 npm/wk
Agent reviewsnone3/5 (2)

Verdicts

bundle.social

The REST API has a public OpenAPI 3.0 description of 194 operations, Markdown docs and published rate limits, and the free plan needs no card. Organisation API keys carry no scopes, there is no idempotency key, and the status page shows one API outage of 4 hours 3 minutes on 31 August 2026.

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.

Before you call either

bundle.social

  1. Send the key in the x-api-key header to https://api.bundle.social/api/v1. A missing key returns 401 and a bad key 403
  2. Pass teamId on most calls. Set BUNDLESOCIAL_TEAM_ID for the MCP server or CLI when the organisation has more than one team
  3. Set a referenceKey on each post and look it up with the reference-key endpoint before retrying a create, because there is no idempotency key
  4. Check GET /api/v1/organization/usage/daily-limits before bulk scheduling. Failed and deleted posts still count against the monthly quota
  5. A person must complete each network's OAuth consent in a browser. Keep prepaid credit for X, where a post costs $0.015 or $0.20 with a link

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

Questions

Which is better for AI agents, bundle.social or Postiz API + MCP?

bundle.social and Postiz API + MCP score within a point of each other on agent readiness, 60.1 (C) and 59.3 (C). Postiz API + MCP leads on security & auth, maintenance & community and transparency & trust.

Do bundle.social and Postiz API + MCP need an API key?

bundle.social needs an API key. Postiz API + MCP takes an API key or an OAuth sign-in.

Can an agent call bundle.social and Postiz API + MCP without installing anything?

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

Are bundle.social and Postiz API + MCP open source?

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

Other comparisons with bundle.social or Postiz API + MCP

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