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April 2026
v1
New
  • POST /x/tweets — added media field (1–4 image URLs); text is now optional when media is present
  • POST /x/accounts/{id}/reauth — added email and proxy_country parameters
  • Expanded Machine Payments Protocol (MPP) pay-per-use to 32 endpoints (tweets, communities, lists, user data)
  • New framework guides: LangChain, Pydantic AI, CrewAI, Mastra, Google ADK, Microsoft Agent Framework
Changed
  • Billing migrated to credits-only model (usage-quota removed)
  • GET /account response: creditInfo replaces currentPeriod
  • POST /credits/estimate response: creditsRequired / creditsAvailable replace usagePercent / projectedPercent
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March 2026
v1
New
  • MPP expanded from 16 to 24 eligible endpoints
  • Webhook delivery signing now uses HMAC-SHA256 with X-Signature-256 header
Changed
  • OAuth 2.1 discovery metadata now served from /.well-known/oauth-authorization-server
  • Rate limit headers standardized to X-RateLimit-Limit / X-RateLimit-Remaining / X-RateLimit-Reset