Cloud Functions API
Cloud Functions API
Google Cloud Functions API deploys and manages serverless functions — write code, configure triggers, invoke, and monitor.
Serverless — pay per invocation and execution time
Cold-start latency (Gen 1: several seconds; Gen 2 improved but still present)
POST /v2/projects/{projectId}/locations/{location}/functions to create — upload source + configure triggers. Or use gcloud CLI for one-command deploy.
Uptime · 30-day window
About this API
Cloud Functions is GCP's FaaS (function-as-a-service) product, competing with AWS Lambda and Azure Functions. Two generations: Gen 1 (2016+, classic version, more constraints); Gen 2 (2022+, rebuilt on Cloud Run + Eventarc with significant performance/feature improvements — longer execution, more memory, concurrent request handling, container-based deployment). Gen 2 is essentially Cloud Run plus a trigger abstraction. Common scenarios: event-driven data processing (image upload triggers thumbnail generation, order writes trigger emails), lightweight HTTP APIs, and webhook receivers for GCP services.
What you can build
- 1Event-driven data processing (Cloud Storage upload triggers function)
- 2HTTP API endpoint deployment
- 3Pub/Sub message consumption
- 4Scheduled tasks (Cloud Scheduler + Functions)
Strengths & limitations
Strengths
- Serverless — pay per invocation and execution time
- Auto-scaling from zero to thousands of concurrent instances
- Native GCP trigger integration (Storage, Pub/Sub, Firestore)
Limitations
- Cold-start latency (Gen 1: several seconds; Gen 2 improved but still present)
- Max execution time 9 minutes (Gen 2: up to 60 minutes)
- Memory cap 8GB
Example request
curl https://google.com/<endpoint>Getting started
POST /v2/projects/{projectId}/locations/{location}/functions to create — upload source + configure triggers. Or use gcloud CLI for one-command deploy.
FAQ
How to choose between Gen 1 and Gen 2?+
Always use Gen 2 for new projects. Gen 1 is mainly for legacy compatibility. Gen 2 offers better performance, quotas, and features.
Cloud Functions vs Cloud Run?+
Functions is "write a function + configure triggers" — simpler abstraction. Cloud Run is "run a container, more control". Gen 2 narrows the gap considerably.
Technical details
- Auth type
- unknown
- Pricing
- unknown
- Protocols
- REST
- SDKs
- python, javascript, typescript, go, java, csharp
- Response time
- 44 ms
- Last health check
- 5/12/2026, 7:37:30 AM
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