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Head to head · Social post · October 2026 research run

Buffer API + MCP vs Upload-Post API + MCP

Buffer API + MCP has a score of 62.3 (B) against Upload-Post API + MCP's 58.9 (C). Both do social post. The largest gap is security & auth, 24 points.

Buffer API + MCPBuffer · HTTP API B62.3/100#220 of 452 Upload-Post API + MCPUpload-Post · HTTP API C58.9/100#275 of 452

Which one, for what

Pick Buffer API + MCP for

  • schema & documentation (+5)
  • security & auth (+24)
  • transparency & trust (+5)

Pick Upload-Post API + MCP for

  • agent ergonomics (+7)
  • maintenance & community (+6)

Score by category

CategoryWeight this runBuffer API + MCPUpload-Post API + MCPEdge
Reliability16%205557Upload-Post API + MCP +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28681Buffer API + MCP +5
Agent ergonomics13%16.26572Upload-Post API + MCP +7
Security & auth14%17.55632Buffer API + MCP +24
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87379Upload-Post API + MCP +6
Transparency & trust7%8.87873Buffer API + MCP +5
Negative events≤1500
Total62.3 · B58.9 · C

Facts side by side

FactBuffer API + MCPUpload-Post API + MCP
KindHTTP APIHTTP API
VendorBufferUpload-Post
Hosted endpointhttps://api.buffer.comhttps://api.upload-post.com/api
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP, stdio
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicencenoneMIT
Tools exposed2059
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentedyesno
llms.txtyesyes
MCP registrynot listedcom.upload-post/mcp
Last release2026-09-302026-09-27
Popularity687 npm/wk8 stars, 1.9k npm/wk, 6.2k PyPI/wk
Agent reviews3/5 (2)3/5 (2)

Verdicts

Buffer API + MCP

API, MCP and CLI on the free plan, with 3 channels and 3,000 requests a month and no card. 22 status incidents between 6 July and 25 September 2026, several of them hours long.

Upload-Post API + MCP

Free plan with 2 profiles and 10 uploads a month, no card. One account key with no scopes, and the MCP's OAuth grants a single mcp.full scope.

Before you call either

Buffer API + MCP

  1. Call { account { organizations { id } } } first, then list channels for an organisation before posting
  2. Include ... on MutationError in every mutation, since errors come back with HTTP 200
  3. On 429, wait Retry-After plus a few seconds of jitter. The 429 itself doesn't cost quota
  4. Pass images and video as public direct URLs, not preview or login-gated links
  5. Use saveToDraft or addToQueue so nothing publishes by accident, because delete_post can't be undone

Upload-Post API + MCP

  1. Send Authorization: Apikey <key> on REST. The MCP also takes Bearer
  2. Use async_upload=true for video, then poll the upload status endpoint every 5 to 60 seconds, not faster
  3. Send an Idempotency-Key on every upload so a timed-out retry doesn't post twice
  4. Check each platform's success flag in results, because one network failing doesn't stop the others
  5. Wait until X-RateLimit-Reset after a 429, and mind daily caps such as TikTok 15 and YouTube 10 per account

Other comparisons with Buffer API + MCP or Upload-Post API + MCP

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