Configuration Reference

Environment Variables

Variable	Default	Description
`RUST_LOG`	`info`	Log level (error, warn, info, debug, trace)
`OTEL_SERVICE_NAME`	`justapi`	Service name for OpenTelemetry
`OTEL_EXPORTER_OTLP_ENDPOINT`	—	OTLP collector endpoint
`DATABASE_URL`	—	Database connection string
`REDIS_URL`	—	Redis connection string
`JWT_SECRET`	—	JWT signing secret

`JustAPIApp()` Constructor

app = JustAPIApp(
    title="My API",           # OpenAPI title
    version="1.0.0",          # OpenAPI version
    description="...",        # OpenAPI description
)

`app.run()` Parameters

app.run(
    addr="127.0.0.1:8000",        # Bind address
    max_body_size=52428800,       # Max body size (50 MiB)
)

Server CLI Flags

justapi serve --host 0.0.0.0 --port 8080 --workers 4 --timeout 30

Flag	Env Variable	Default	Description
`--host`	`HOST`	`127.0.0.1`	Bind address
`--port`	`PORT`	`8000`	Bind port
`--workers`	—	CPU count	Worker processes
`--timeout`	—	`30`	Request timeout (seconds)
`--reload`	—	false	Hot-reload
`--unix`	—	—	Unix socket path

Feature Flags (Cargo)

# Cargo.toml features for justapi-core
[dependencies]
justapi-core = { features = [
    "tls",            # TLS support via rustls
    "ws",             # WebSocket support
    "compression",    # Response compression
    "opentelemetry",  # OpenTelemetry tracing
    "db",             # Database support
    "simd-json",      # SIMD-accelerated JSON
] }

See Also

CLI Reference — Command line options
Environment Variables — Runtime configuration
Feature Flags