QuantaAPI
Dashboard
Getting started

Introduction

QuantaAPI is a mock API platform. Define an endpoint, shape its response, and call it from your frontend before the real backend exists.

Free while in beta
No account required to call a mock

QuantaAPI lets you create mock REST endpoints and control how they behave: the JSON body they return, how long they take to answer, which requests they accept, and how often they fail. Your frontend can integrate against a stable contract from day one.

Free during betaThere are no plans, quotas, or billing. Every feature described here is available to every account.

What you can do

  • Group endpoints into collections and give each collection its own API key.
  • Create endpoints with an exact path and HTTP method.
  • Return any JSON body, with template variables that change per request.
  • Add latency to imitate a slow network.
  • Reject malformed requests by declaring required headers and body fields.
  • Return random failures at a configurable rate to exercise error handling.
  • Send a request from the dashboard and inspect the result.
  • Review request logs and a seven-day traffic chart per endpoint.

How the pieces fit

CollectionA group of endpoints. Each collection owns one API key that consumers send as a header.EndpointA path plus an HTTP method inside a collection. Its path and method together are its identity.RequestOne call to a mock endpoint. Validated, optionally failed on purpose, delayed, and always logged.

How a mock request is served

  1. 01
    The collection key is resolvedThe request must carry the collection key in the x-collection-api-key header. Without it the call is rejected with 403.
  2. 02
    The endpoint is matchedQuantaAPI looks for an endpoint in that collection with the exact same path and HTTP method. If none matches, it returns 404.
  3. 03
    The payload is validatedDeclared headers and body fields are checked. Anything out of contract returns 400.
  4. 04
    Failure may be injectedIf the request is valid and an error is rolled, a random entry from the error pool becomes the response.
  5. 05
    The response is renderedTemplate variables in your stored JSON are replaced with the real values.
  6. 06
    Latency is applied and the request is loggedThe configured delay is waited out, then the result is written to the request log.

Current scope

Endpoint type
REST only
Payload format
JSON object
Methods
GET, POST, PUT, PATCH, DELETE, OPTIONS, HEAD
Mock base URL
https://quanta-api-backend.vercel.app/endpoints/fetch
Pricing
Free, no plans or quotas
NextCreate your first mock in five minutes with the quickstart, or read the authentication model first if you want to understand the two kinds of credentials.