Eppo scores Band C on The Headless Index. Its JAIRF rating is not available because no machine-readable spec was scored. Its strongest area for agent use is schema observability; its weakest is MCP and agent posture.

Does Eppo publish an OpenAPI spec?

No published OpenAPI specification was found when Eppo was scored. That caps its JAIRF dimensions and forces agents to rely on documentation or reverse engineering to operate it.

What is Eppo's Headless Index score?

Eppo scores 40/100 on the Headless Index thesis-fit rubric and sits in Band C in the Feature Flags & Config category. The score weighs API-first design, headless operation, MCP and agent posture, schema observability, and webhooks.

03 / Scorecard / Feature Flags & Config

Eppo

Headless Index

40/100

JAIRF

N/A

Verified

AUG 20, 2026

Methodology v1 · JAIRF v1.0.0

Eppo earns Band C in the Feature Flags & Config category of The Headless Index, with a thesis-fit score of 40/100. Its strongest dimension is schema observability (14/20); its weakest scored dimension is MCP and agent posture (4/20). No public OpenAPI specification was found when Eppo was scored, which limits how far an agent can go without human integration work.

Editorial verdict

Eppo is partially headless and partly UI-led. The Headless Index thesis-fit score of 40/100 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 Eppo lands inside that pattern. On the API surface, the question is whether the API is the product or a layer beneath the dashboard. Eppo is experimentation platform with REST API plus SDKs in JavaScript, Node, Python, Go, Ruby, Java, and others. The product is positioned for the data-team-led experimentation use case, with first-class warehouse integration.^[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 docs.geteppo.com. Schema discoverability is good.^[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: Experiments, assignments, metrics, and warehouse syncs are programmable. The Eppo dashboard handles configuration.^[3] On the MCP and agent-integration axis, which is the fastest-moving criterion in the index: No first-party Eppo MCP server. The data-team-focused positioning has not yet extended to MCP integration.^[4] Event posture closes the loop: an agent that cannot react to state changes is reduced to polling. Eppo webhooks deliver experiment events. Catalog is appropriate for experimentation. Net assessment: integrators can build agent flows against Eppo, but the rough edge to plan around is MCP posture^[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

Eppo is experimentation platform with REST API plus SDKs in JavaScript, Node, Python, Go, Ruby, Java, and others. The product is positioned for the data-team-led experimentation use case, with first-class warehouse integration.

signals (5)

+AI review appliedReviewer: Editorial review on 2026-05-20
−OpenAPI specNot found across 0 probe paths
·GraphQL endpointDiscovered at https://www.geteppo.com/graphql, introspection disabled or scoped
+SDKs maintained12 (dotnet, go, java, javascript, php, swift, typescript); top by stars: Eppo-exp/js-sdk-common (11 stars)
+npm weekly downloads64.0k across published packages; top: @eppo/js-client-sdk-common @ 64.0k/week

cite (5)

openapi.probes_tried@2026-05-19
graphql.url@2026-05-19
github.sdks@2026-05-19
freshness.most_recent_sdk_commit@2026-05-19
github.sdks@2026-05-19

Headless operation8/20

scored

Experiments, assignments, metrics, and warehouse syncs are programmable. The Eppo dashboard handles configuration.

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 posture4/20

scored

No first-party Eppo MCP server. The data-team-focused positioning has not yet extended to MCP integration.

signals (4)

+AI review appliedReviewer: Editorial review on 2026-05-20
−Official MCP serverNone found in vendor's GitHub org or the official MCP registry
−Community MCP serversNone found
+Agent-friendly SDKs5 TS/JS SDKs available; top: node-server-sdk (20/week downloads)

cite (1)

ai_review_browser.pages_fetched@2026-05-20

Schema observability14/20

scored

REST documented at docs.geteppo.com. Schema discoverability is good.

signals (3)

+AI review appliedReviewer: Editorial review on 2026-05-20
−OpenAPINot discovered across 0 standard probe paths
·GraphQL introspectionGraphQL endpoint at https://www.geteppo.com/graphql but introspection is disabled, scoped, or behind authentication

cite (1)

ai_review_browser.schema@2026-05-20

Webhooks & events4/20

scored

Eppo webhooks deliver experiment events. Catalog is appropriate for experimentation.

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

Band rationale:C band: scores 40-75 range

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FAQ

Eppo and agent readiness

Is Eppo agent-ready?: Eppo scores Band C on The Headless Index. Its JAIRF rating is not available because no machine-readable spec was scored. Its strongest area for agent use is schema observability; its weakest is MCP and agent posture.
Does Eppo publish an OpenAPI spec?: No published OpenAPI specification was found when Eppo was scored. That caps its JAIRF dimensions and forces agents to rely on documentation or reverse engineering to operate it.
What is Eppo's Headless Index score?: Eppo scores 40/100 on the Headless Index thesis-fit rubric and sits in Band C in the Feature Flags & Config category. The score weighs API-first design, headless operation, MCP and agent posture, schema observability, and webhooks.