$HEADLESS SYSTEMS
03 / Scorecard / Feature Flags & Config

PostHog Feature Flags

C
Headless Index
50/100
JAIRF
N/A
Verified
MAY 21, 2026
Methodology v1 · JAIRF v1.0.0

Powered by JAIRF v1.0.0 by Jentic · open methodology at /the-headless-index/methodology

Editorial verdict
PostHog Feature Flags is partially headless and partly UI-led. The Headless Index thesis-fit score of 50/100 puts it mid-table on the index, and JAIRF is recorded as N/A for this vendor because no public OpenAPI specification was reachable for the open-source scorer. In practice, vendors at this tier are partly machine-consumable: the core flows are reachable through code but several adjacent surfaces still expect a human at a dashboard, and the rest of this verdict explains where PostHog Feature Flags lands inside that pattern. On the API surface, the question is whether the API is the product or a layer beneath the dashboard. PostHog Flags is part of the PostHog product analytics platform; feature flags are integrated with the analytics surface. REST API plus the broader PostHog SDK ecosystem.[1] Schema observability is the related test: can an agent introspect the contract from cold, or does it have to read prose documentation to do so? REST documented at posthog.com/docs. OpenAPI specifications published. Schema discoverability is reference-class.[2] An agent can drive parts of this product, but not all of it: integrators should plan for human-in-the-loop checkpoints where the headless surface stops short. On headless operability: Flags, experiments, cohorts (for targeting), and remote config are programmable through the PostHog API. Self-host plus PostHog Cloud share the API.[3] On the MCP and agent-integration axis, which is the fastest-moving criterion in the index: PostHog publishes posthog/posthog-mcp which covers flags alongside analytics. First-party MCP integration is in place.[4] Event posture closes the loop: an agent that cannot react to state changes is reduced to polling. PostHog webhooks cover feature flag changes alongside analytics events. Catalog is comprehensive. Net assessment: integrators can build agent flows against PostHog Feature Flags, but the rough edge to plan around is schema observability[5]. Expect to wrap missing pieces in bespoke glue or accept human-in-the-loop checkpoints. Workable but requires scaffolding.
Verdict by Headless Index pipeline (auto)
// AI-drafted from the evidence layer. Editorial review pending.
Scores

Scorecard detail

Headless Index · 5 sub-criteria
API-first design intent10/20
scored

PostHog Flags is part of the PostHog product analytics platform; feature flags are integrated with the analytics surface. REST API plus the broader PostHog SDK ecosystem.

signals (5)
  • +AI review appliedReviewer: Editorial review on 2026-05-20
  • OpenAPI specNot found across 17 probe paths
  • GraphQL endpointNot discovered (5 probes; project-scoped endpoints require a real project ID)
  • +SDKs maintained3 (kotlin, rust, swift); top by stars: PostHog/posthog-ios (97 stars)
  • +SDK recency3 of 3 SDK repos pushed within 30 days (most recent SDK commit: 2026-05-19)
cite (4)
  • openapi.probes_tried@2026-05-19
  • graphql.probes_tried@2026-05-19
  • github.sdks@2026-05-19
  • freshness.most_recent_sdk_commit@2026-05-19
Headless operation12/20
scored

Flags, experiments, cohorts (for targeting), and remote config are programmable through the PostHog API. Self-host plus PostHog Cloud share the API.

signals (9)
  • +AI review appliedReviewer: Editorial review on 2026-05-20
  • API operations exposedNo OpenAPI spec; operations count unknown
  • ·Docs pages crawled0 pages (crawler: none)
  • ·Auth schemes documentedAuth documentation page not reached by crawler
  • ·Setup / quickstart docsNot reached by crawler
  • ·Billing docsNot reached by crawler
  • ·Teams / org docsNot reached by crawler
  • ·CLI docsNot reached by crawler
  • ·Schema / data model docsNot reached by crawler
cite (1)
  • ai_review_browser.topics_found@2026-05-20
MCP & agent posture20/20
scored

PostHog publishes posthog/posthog-mcp which covers flags alongside analytics. First-party MCP integration is in place.

signals (4)
  • +AI review appliedReviewer: Editorial review on 2026-05-20
  • +Official MCP serverhttps://github.com/PostHog/mcp (142 stars, last commit 121 days ago)
  • Community MCP serversNone found
  • Agent-friendly SDKsNo TypeScript/JavaScript SDK published (agents commonly run in TS/JS)
cite (1)
  • ai_review_browser.mcp@2026-05-20
Schema observability4/20
scored

REST documented at posthog.com/docs. OpenAPI specifications published. Schema discoverability is reference-class.

signals (3)
  • +AI review appliedReviewer: Editorial review on 2026-05-20
  • OpenAPINot discovered across 17 standard probe paths
  • GraphQL introspectionNo GraphQL endpoint discovered (5 probes; some vendors use project-scoped endpoints that require a real project handle)
cite (1)
  • ai_review_browser.pages_fetched@2026-05-20
Webhooks & events4/20
scored

PostHog webhooks cover feature flag changes alongside analytics events. Catalog is comprehensive.

signals (2)
  • +AI review appliedReviewer: Editorial review on 2026-05-20
  • ·Webhook docs pageNot reached by crawler within budget (0 pages crawled). Cannot confirm whether vendor offers webhooks.
cite (1)
  • ai_review_browser.pages_fetched@2026-05-20
JAIRF · 6 dimensions
JAIRF · N/A

This vendor does not publish a public OpenAPI specification. JAIRF cannot be computed. The Headless Index score and editorial verdict carry the readiness assessment.

No public OpenAPI specification discovered during collection

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Band rationale:C band: scores 40-75 range

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Calibration

How THI compares to external scorers

SourceScoreMeasuresLast checked
Fern Agent Score86 · BDocumentation completeness and SDK shape (~22 checks)April 10, 2026
CLIRank Agent Friendlinessnot foundCLI readiness, docs quality, and overall agent affordances
Cloudflare Is It Agent Ready?blockedCloudflare's manual agent-readiness heuristic per vendor URL
Jentic Scorecardn aJAIRF-based scorecard requiring a public OpenAPI specification
THI 50 vs external median 86, delta -36Methodology delta noted — see verdict

THI display 50 vs external median 86 (delta -36). Deviation > 25 points: editor should review whether THI methodology is over-strict or external scorers are over-generous for this vendor.