How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Featureflip

Featureflip Server SDK API

SDK endpoints for feature flag evaluation and configuration retrieval.All endpoints require a valid SDK key passed via the Authorization header.

Documentation Provider Profile APIs.io OpenAPI GitHub

Featureflip Server SDK API is one of 10 APIs that Featureflip publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Server SDK. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, and API documentation.

This API exposes 5 operations across 5 paths, and defines 21 schemas. It is described by OpenAPI 3.2.0, at version v1.

Requests are made against a single base URL, https://eval.featureflip.io.

5 operations 5 paths 21 schemas 3 GET2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
v1
Base URL
https://api.featureflip.io
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Featureflip Server SDK API declares 1 security scheme for authenticating requests. An API key is passed in the header as Authorization (Bearer). By default, every request must be authenticated.

  • Bearer — SDK Key authorization. Enter your SDK key.

Paths & Operations 5

Across 5 paths, the API surfaces 5 operations — 3 GET, 2 POST. Each is listed below with its method, path, parameters, and response codes.

Server SDK 5

SDK endpoints for feature flag evaluation and configuration retrieval. All endpoints require a valid SDK key passed via the Authorization header.

GET
/v1/sdk/flags
Retrieves all feature flags for the authenticated environment
getV1SdkFlags → 200401503
GET
/v1/sdk/flags/{key}
Retrieves a specific feature flag by key
getV1SdkFlagsByKey 1 param → 200401404503
POST
/v1/sdk/evaluate
Evaluates a feature flag for the given context
postV1SdkEvaluate body → 200401404503
POST
/v1/sdk/events
Records SDK events for analytics and debugging
postV1SdkEvents body → 202401
GET
/v1/sdk/stream
Opens a Server-Sent Events stream for real-time flag updates
getV1SdkStream → 200401503

Schemas 21

The contract defines 21 schemas that model the data the API accepts and returns. The most detailed are FlagDto (9 properties), SdkEventDto (7 properties), ServeConfigDto (5 properties), RuleDto (5 properties). Each schema is shown below with its type and property counts.

ConditionOperator
string
EvaluateFlagResponse
object
5 properties 4 required
ProblemDetails
object
5 properties
ServeType
string
ConditionDto
object
4 properties 3 required
SdkEventType
string
VariationDto
object
2 properties 2 required
GetFlagsResponse
object
4 properties 4 required
RuleDto
object
5 properties 4 required
EvaluateFlagRequest
object
2 properties 2 required
FlagType
string
WeightedVariationDto
object
2 properties 2 required
FlagDto
object
9 properties 9 required
ConditionGroupDto
object
2 properties 2 required
ServeConfigDto
object
5 properties 1 required
RecordEventsRequest
object
1 property 1 required
SdkEventDto
object
7 properties 2 required
ConditionLogic
string
SegmentDto
object
4 properties 4 required
PrerequisiteDto
object
2 properties 2 required
EvaluationContextDto
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

featureflip-server-sdk-api-openapi.yml Raw ↑

Other APIs Featureflip publishes across the network.

MCP Server (local)
AE Profile APIs.io
Featureflip Client SDK API
AE Profile APIs.io
Featureflip Environments API
AE Profile APIs.io
Featureflip Feature Flags API
AE Profile APIs.io
Featureflip Me API
AE Profile APIs.io
Featureflip Organizations API
AE Profile APIs.io
Featureflip Projects API
AE Profile APIs.io
Featureflip SDK Keys API
AE Profile APIs.io
Featureflip User Segments API
AE Profile APIs.io
#Server SDK
← Back to F APIs
API Details
ID
featureflip:featureflip-server-sdk-api
Base URL
https://api.featureflip.io
Docs
https://featureflip.io/docs/management-api/overview/
Provider
Featureflip
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=featureflip-server-sdk-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/featureflip-server-sdk-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Featureflip Server SDK API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.