easy-api-builder 2026.1.0

A clean, efficient Flask-based API builder with authentication, routing, and error handling.

easy-api-builder

A lightweight Flask wrapper for building JSON APIs without boilerplate. Register endpoints, authentication, and error handling in a single fluent call, then consume any API with the built-in easy_request helper.

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Installation

pip install flask requests werkzeug

Place api_builder.py in your project directory and import from it directly.

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Quick start

from api_builder import ApiBuilder, easy_request

api = ApiBuilder()

api.get("/status", {"ok": True})
api.run()

Visit http://localhost:5000/status — done.

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ApiBuilder

Constructor

api = ApiBuilder(
    name=__name__,         # Flask app name
    template_folder="templates",  # folder for HTML error pages
    debug=False,           # enable Flask debug mode
)

Registering endpoints

All registration methods return self, so calls can be chained.

.get(path, payload, *, auth_keys, handler)

# Static payload
api.get("/hello", {"message": "Hello, world!"})

# Key-protected
api.get("/secret", {"data": 42}, auth_keys=["abc123", "xyz789"])

# Custom handler
def my_handler():
    from flask import jsonify, request
    return jsonify({"echo": request.args.get("q")})

api.get("/echo", handler=my_handler)

.post(path, payload, *, auth_keys, handler)

Same signature as .get(), registers a POST endpoint.

from flask import jsonify, request

def handle_submit():
    body = request.get_json()
    return jsonify({"received": body})

api.post("/submit", handler=handle_submit)

.route(path, methods, payload, *, auth_keys, handler)

Register any HTTP verb or combination of verbs.

api.route("/ping", ["GET", "POST"], {"pong": True})

Starting the server

# Blocking — use for production-style scripts
api.run(host="0.0.0.0", port=5000)

# Non-blocking daemon thread — use when running alongside other code
thread = api.run_async(port=5000)

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Authentication

Pass auth_keys to any registration method. Requests must include ?key=<value> in the URL.

api.get("/private", {"data": "secret"}, auth_keys=["abc123"])

Scenario	Status	Response
No key supplied	401	{"error": "API key required."}
Wrong key	403	{"error": "Invalid API key."}
Valid key	200	Your payload

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Error handling

All HTTP errors are returned as JSON automatically — no setup required.

{
  "code": 404,
  "name": "Not Found",
  "description": "..."
}

If a templates/404.html file exists it will be rendered for 404s; otherwise the JSON fallback is used.

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easy_request

A thin wrapper around requests with built-in error handling.

easy_request(
    url,               # target URL (required)
    method="GET",      # HTTP verb
    params=None,       # URL query parameters (dict)
    json_body=None,    # request body sent as JSON (dict)
    headers=None,      # extra headers (dict)
    timeout=10,        # socket timeout in seconds
    api_key=None,      # appended as ?key= automatically
)

Returns a parsed JSON dict on success, or a safe error dict on failure.

# Simple GET
data = easy_request("https://api.example.com/users")

# Authenticated
data = easy_request("http://localhost:5000/secret", api_key="abc123")

# POST with body
data = easy_request(
    "http://localhost:5000/submit",
    method="POST",
    json_body={"name": "Alice"},
)

Error responses

{"error": "Request timed out.",  "url": "..."}          # timeout
{"error": "...",  "status_code": 403}                   # HTTP error
{"error": "Non-JSON response.",  "body": "..."}          # non-JSON body

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Full example

from flask import jsonify, request
from api_builder import ApiBuilder, easy_request

api = ApiBuilder()

# Public status endpoint
api.get("/status", {"ok": True})

# Protected data endpoint
api.get("/data", {"value": 99}, auth_keys=["secret-key"])

# Dynamic POST handler
def echo():
    return jsonify(request.get_json())

api.post("/echo", handler=echo)

# Start in background thread
api.run_async(port=5000)

# Consume the protected endpoint
result = easy_request("http://localhost:5000/data", api_key="secret-key")
print(result)  # {"value": 99}

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License

MIT