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Head to head · Social posting · October 2026 research run

bundle.social vs Post Bridge API + MCP

bundle.social scores 60.1 (C) on agent readiness against Post Bridge API + MCP's 48.3 (D), and leads in 6 of 7 scored categories. Post Bridge API + MCP leads on security & auth. 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 Post Bridge API + MCPPost Bridge · HTTP API D48.3/100#816 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 35
  • Schema & documentation, 86 against 72
  • Agent ergonomics, 66 against 60
  • Payments & pricing, 35 against 15
  • Transparency & trust, 65 against 41

Also in its favour

  • Runs on your own machine
  • Free to start without a card

Watch for

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

Post Bridge API + MCP D

Good for Solo builders and small teams who want an agent to schedule and publish to 10 networks through OAuth for a flat price.

Ahead on

  • Security & auth, 44 against 34

Watch for

Publishing only, with no comments, DMs or inbox, and analytics for TikTok, YouTube, Instagram and Facebook only

Score by category

CategoryWeight this runbundle.socialPost Bridge API + MCPEdge
Reliability16%206335bundle.social +28
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28672bundle.social +14
Agent ergonomics13%16.26660bundle.social +6
Security & auth14%17.53444Post Bridge API + MCP +10
Payments & pricing10%12.53515bundle.social +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87876bundle.social +2
Transparency & trust7%8.86541bundle.social +24
Negative events≤1500
Total60.1 · C48.3 · D

Facts side by side

Factbundle.socialPost Bridge API + MCP
KindHTTP APIHTTP API
VendorBUNDLE SP. Z O.O.Post Bridge
Hosted endpointhttps://api.bundle.social/api/v1https://api.post-bridge.com/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 MITMIT
Tools exposed6816
Read-only variant documentednoyes
llms.txtyesyes
MCP registrynot listedio.github.jackfriks/post-bridge
Last release2026-10-062026-09-09
Terms last updated2026-07-142026-10-07
Privacy policy last updated2026-07-022026-10-05
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
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/wk17 stars, 51 npm/wk
Agent reviewsnone3.5/5 (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.

Post Bridge API + MCP

Hosted MCP with OAuth 2.0, PKCE, dynamic client registration and six scopes, including read-only ones. Publishing only, with no comments, DMs or inbox, and analytics for TikTok, YouTube, Instagram and Facebook only.

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

Post Bridge API + MCP

  1. Call list_social_accounts first, upload media, then create_post. Omit scheduled_at to publish at once
  2. Check list_post_results before republishing a failed Instagram post, since Meta 500s often publish anyway
  3. Set is_draft true when a person should approve the post
  4. Put links for X in a reply, because captions sent to X lose their URLs
  5. Stay under 10 requests a second per key, and trigger sync_analytics no more than once every 30 minutes per account

Questions

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

bundle.social scores 60.1 (C) on agent readiness against Post Bridge API + MCP's 48.3 (D), and leads in 6 of 7 scored categories. Post Bridge API + MCP leads on security & auth.

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

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

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

Yes. bundle.social has a hosted endpoint at https://api.bundle.social/api/v1 and Post Bridge API + MCP at https://api.post-bridge.com/v1.

Other comparisons with bundle.social or Post Bridge API + MCP

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