Blog batch 2026-08-19: Perplexity MCP, AWS vs Terraform MCP, PostHog MCP

[gusmar2017]

Summary

• Perplexity MCP Server (Gus) — the 4-tool breakdown (perplexity_search/ask/research/reason), how each maps to Perplexity's Agent API effort presets, and CTO Denis Yarats's public March 2026 comments about Perplexity moving internal/enterprise systems away from MCP even while its public server remains "the recommended" path. focusKeyword: perplexity mcp server. topic_source: new_topic.
• AWS MCP Server vs Terraform MCP Server (Adam) — clarifies the AWS-servers-do-live-resources vs Terraform-server-does-plan/apply split, anchored on the verified fact that AWS deprecated its own awslabs/terraform-mcp-server in favor of HashiCorp's official server. focusKeyword: aws mcp server vs terraform mcp server. topic_source: new_topic.
• PostHog MCP Server (Adam) — covers the 3 tool surfaces (feature flags, session recordings, natural-language-to-SQL warehouse queries) and the repo's consolidation from a standalone posthog/mcp repo (archived) into the posthog/posthog monorepo. focusKeyword: posthog mcp server. topic_source: new_topic.

All 3 came from the existing queue (Topics 114 and 127, both previously held on cannibalization/overlap caution) plus new replenishment research — see the editorial calendar commit in mac-mini-agent for full topic selection and keyword research notes.

Sentinel validation log (Two-Agent Validation Loop)

Post	Round 1	Round 2	Round 3 (final)
Perplexity MCP Server	NEEDS_REVISION (38%, 4 flagged)	NEEDS_REVISION (32%, 3 flagged)	PASS (27%)
AWS vs Terraform MCP Servers	NEEDS_REVISION (58%, 6 flagged)	NEEDS_REVISION (38%, 3 flagged)	PASS (38%)
PostHog MCP Server	NEEDS_REVISION (52%, 4 flagged)	PASS (20%)	— (shipped Round 2)

All 3 posts reached PASS within the loop (2 at the final Round 3, 1 at Round 2) — none shipped at NEEDS_REVISION this batch.

Validation performed

• gray-matter frontmatter parses cleanly for all 3 posts
• Zero em dashes across all 3 posts
• Banned-word blocklist scan clean
• Word count 1,200-1,500 for all 3 (1,246 / 1,217 / 1,252)
• FAQ frontmatter matches body FAQ content exactly for all 3
• Cornerstone link (/blog/what-is-mcp) present in all 3
• 2+ directory links (/servers/ or /categories/) present in all 3
• Cluster sibling links present (search: 1 sibling linked; cloud: 3 siblings linked; analytics: 3 siblings linked)
• No fabricated server slugs — Perplexity's and PostHog's official servers are not yet indexed in MCPFind's own directory, both posts disclose this explicitly and link to category pages instead

🤖 Generated with Claude Code

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