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Head to head · Social post · October 2026 research run

Buffer API + MCP vs Metricool API + MCP

Buffer API + MCP has a score of 62.3 (B) against Metricool API + MCP's 38.7 (E). Both do social post. The largest gap is maintenance & community, 67 points.

Buffer API + MCPBuffer · HTTP API B62.3/100#220 of 452 Metricool API + MCPMetricool · HTTP API E38.7/100#428 of 452

Which one, for what

Pick Buffer API + MCP for

  • reliability (+20)
  • schema & documentation (+30)
  • agent ergonomics (+26)
  • security & auth (+8)
  • maintenance & community (+67)
  • transparency & trust (+14)

Pick Metricool API + MCP for

No category where it leads by five points or more.

Score by category

CategoryWeight this runBuffer API + MCPMetricool API + MCPEdge
Reliability16%205535Buffer API + MCP +20
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28656Buffer API + MCP +30
Agent ergonomics13%16.26539Buffer API + MCP +26
Security & auth14%17.55648Buffer API + MCP +8
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8736Buffer API + MCP +67
Transparency & trust7%8.87864Buffer API + MCP +14
Negative events≤150-2
Total62.3 · B38.7 · E

Facts side by side

FactBuffer API + MCPMetricool API + MCP
KindHTTP APIHTTP API
VendorBufferMetricool
Hosted endpointhttps://api.buffer.comhttps://app.metricool.com/api
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
Licencenonenone
Tools exposed20none
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 listednot listed
Last release2026-09-302025-10-07
Popularity687 npm/wk424 PyPI/wk
Agent reviews3/5 (2)2.5/5 (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.

Metricool API + MCP

Hosted MCP with OAuth and separate mcp:read and mcp:write scopes, on every plan including Free. REST API only on Advanced ($67 a month) and Custom.

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

Metricool API + MCP

  1. Connect the hosted MCP at https://ai.metricool.com/mcp with OAuth, and ask only for mcp:read when the job is reporting
  2. Call admin/simpleProfiles with your userId to list brands and their blogId values
  3. Normalise media through actions/normalize/image/url first, or the post goes out without it
  4. Give publicationDate a dateTime and an IANA timezone, in the future
  5. Back off on your own, since no rate limits or Retry-After are documented

Other comparisons with Buffer API + MCP or Metricool API + MCP

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