Dapr Has a Free API — Build Microservices Without Lock-In

#dapr #microservices #api #cloud

Dapr (Distributed Application Runtime) gives your microservices portable building blocks — state, pub/sub, secrets, bindings — via simple HTTP/gRPC APIs.

What Is Dapr?

Dapr provides standardized APIs that abstract away infrastructure. Switch from Redis to DynamoDB, or RabbitMQ to Kafka, without changing code.

Building blocks:

Service invocation
State management
Pub/Sub messaging
Bindings (input/output)
Secrets management
Configuration
Distributed lock
Workflow

Quick Start

# Install Dapr CLI
curl -fsSL https://raw.githubusercontent.com/dapr/cli/master/install/install.sh | bash

# Initialize
dapr init

# Run your app with Dapr sidecar
dapr run --app-id myapp --app-port 3000 -- node app.js

HTTP API Examples

# Save state
curl -X POST http://localhost:3500/v1.0/state/statestore \
  -H "Content-Type: application/json" \
  -d '[{"key":"user1","value":{"name":"Alice"}}]'

# Get state
curl http://localhost:3500/v1.0/state/statestore/user1

# Publish event
curl -X POST http://localhost:3500/v1.0/publish/pubsub/orders \
  -H "Content-Type: application/json" \
  -d '{"orderId":"123","amount":99.99}'

# Service-to-service call
curl http://localhost:3500/v1.0/invoke/other-service/method/api/data

# Get secret
curl http://localhost:3500/v1.0/secrets/my-secret-store/db-password