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

ReqRes Authentication API

The Authentication API from ReqRes — 3 operation(s) for authentication.

ReqRes Authentication API is one of 6 APIs that ReqRes publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 16 JSON Schema definitions.

Tagged areas include Authentication. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, pricing, an engineering blog, a JSON-LD context, and 16 JSON Schemas.

This API exposes 3 operations across 3 paths, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 2.1.0.

Requests are made against 2 base URLs: https://reqres.in, http://localhost:8000.

3 operations 3 paths 4 schemas 3 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2.1.0
Servers
https://reqres.in
http://localhost:8000
Authentication
API Key, HTTP Bearer
License
Resource Areas
1

Authentication & Security 2

ReqRes Authentication API declares 2 security schemes for authenticating requests. An API key is passed in the header as x-api-key (ApiKeyAuth). It accepts HTTP bearer tokens (session_token) (BearerAuth).

Paths & Operations 3

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

Authentication 3
POST
/api/register
ReqRes Register User
registerUser body → 200400
POST
/api/login
ReqRes Login User
loginUser body → 200400
POST
/api/logout
ReqRes Logout User
logoutUser → 200

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are RegisterResponse (2 properties), ErrorResponse (2 properties), AuthRequest (2 properties), LoginResponse (1 property). Each schema is shown below with its type and property counts.

AuthRequest
object
2 properties 2 required
ErrorResponse
object
2 properties 1 required
LoginResponse
object
1 property 1 required
RegisterResponse
object
2 properties 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

reqres-authentication-api-openapi.yml Raw ↑

Other APIs ReqRes publishes across the network.

ReqRes Agent Sandbox API
ReqRes App Users API
ReqRes Collections API
ReqRes Custom Endpoints API
ReqRes Legacy API
Where this information came from

This is an independent, third-party profile of ReqRes Authentication 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.