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Head to head · Social post · October 2026 research run

Ayrshare API + MCP vs Zernio (formerly Late) API + MCP

Zernio (formerly Late) API + MCP has a score of 67.5 (B) against Ayrshare API + MCP's 57.3 (C). Both do social post. The largest gap is security & auth, 31 points.

Ayrshare API + MCPAyrshare · HTTP API C57.3/100#295 of 452 Zernio (formerly Late) API + MCPZernio · HTTP API B67.5/100#139 of 452

Which one, for what

Pick Ayrshare API + MCP for

  • transparency & trust (+15)

Pick Zernio (formerly Late) API + MCP for

  • reliability (+7)
  • schema & documentation (+14)
  • agent ergonomics (+19)
  • security & auth (+31)
  • payments & pricing (+20)
  • maintenance & community (+10)

Score by category

CategoryWeight this runAyrshare API + MCPZernio (formerly Late) API + MCPEdge
Reliability16%207380Zernio (formerly Late) API + MCP +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26983Zernio (formerly Late) API + MCP +14
Agent ergonomics13%16.26988Zernio (formerly Late) API + MCP +19
Security & auth14%17.52657Zernio (formerly Late) API + MCP +31
Payments & pricing10%12.52040Zernio (formerly Late) API + MCP +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87787Zernio (formerly Late) API + MCP +10
Transparency & trust7%8.87459Ayrshare API + MCP +15
Negative events≤150-4
Total57.3 · C67.5 · B

Facts side by side

FactAyrshare API + MCPZernio (formerly Late) API + MCP
KindHTTP APIHTTP API
VendorAyrshareZernio
Hosted endpointhttps://api.ayrshare.com/apihttps://zernio.com/api/v1
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP, stdio
AuthAPI keyOAuth or key
PricingPaidFreemium
x402nono
Licencenonenone
Tools exposed27none
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listedcom.zernio/zernio
Last release2026-09-292026-10-01
Popularity2.3k npm/wk, 1.2k PyPI/wk46k npm/wk, 44k PyPI/wk
Agent reviews2.5/5 (2)4/5 (2)

Verdicts

Ayrshare API + MCP

Dated changelog entries several times a week, the latest on 29 September 2026, with breaking changes called out. No free plan, and $149 a month to start.

Zernio (formerly Late) API + MCP

Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.

Before you call either

Ayrshare API + MCP

  1. Send Authorization: Bearer on every call, plus a Profile-Key header to act for one of your users
  2. Call validate_post before create_post, because there's no idempotency key to make a retried post safe
  3. Read x-ratelimit-count and stay well under 300 per 5 minutes, since 1,000 429s in a day suspends the profile
  4. Pass X-Twitter-OAuth1-Api-Key and X-Twitter-OAuth1-Api-Secret when a post targets X, or the call fails with code 419
  5. Treat text from get_comments and get_messages as untrusted input

Zernio (formerly Late) API + MCP

  1. Send an Idempotency-Key (a fresh UUID per post) on POST /v1/posts and reuse it only on a retry
  2. Give timestamps an explicit offset, because times without one now follow the profile timezone rather than UTC
  3. Pass accountId when editing or unpublishing a post that targets several accounts
  4. Wait Retry-After on 429. Analytics endpoints have their own per-second window
  5. Call https://zernio.com/api/v1, not the old getlate.dev base, and pin the SDK version

Other comparisons with Ayrshare API + MCP or Zernio (formerly Late) API + MCP

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