Quick recommendation
When you search for "Celo uptime," you're likely trying to answer one of two questions: Is the Celo network healthy right now, and can I trust the RPC endpoints my dApp depends on? Both matter, but they require different monitoring approaches. For network-level health, the official Celo status page is the authoritative source. For RPC reliability, you need to evaluate providers based on their own status pages, historical uptime, and failover behavior.
If you're building on Celo, start by checking the official Celo status page for network incidents. Then, for your RPC infrastructure, consider a provider like OnFinality that offers dedicated nodes and RPC services with clear operational transparency. A good rule of thumb: don't rely on a single RPC endpoint. Use multiple providers or a failover strategy to keep your dApp resilient.
Understanding Celo uptime: network vs. RPC
Celo uptime can refer to two distinct things:
- Network uptime: The health of the Celo blockchain itself, including block production, transaction sequencing, and finalization.
- RPC uptime: The availability of the endpoints that let your dApp read and write to the network. This is what you experience as a developer.
Both are critical, but they are measured and monitored differently. Network uptime is largely out of your control, but RPC uptime is something you can influence by choosing reliable providers and implementing redundancy.
How to check Celo network status
The first step in monitoring Celo uptime is to check the official status page. The Celo status page provides real-time information on:
- Block production
- Transaction sequencing
- Batch submission
- Block finalization
- Deposits and withdrawals
- Data availability layer
It also shows historical uptime percentages for the last 30 days. For example, the status page might show "100% uptime" for mainnet components, but testnet components like Celo Sepolia Forno might have lower uptime. This distinction is important: testnet reliability is often lower than mainnet, and you should plan accordingly.
What to look for on the status page
When you visit the status page, check for:
- Current incidents: Any ongoing issues that could affect your dApp.
- Historical uptime: The 30-day uptime percentage for each component.
- Component-specific status: For example, if block production is degraded, transactions might be delayed.
If you see an incident, check whether it affects the specific components your dApp relies on. For instance, if you're building a payment app, you care about transaction sequencing and finalization.
Monitoring RPC endpoint uptime
While the network status page tells you about the blockchain, it doesn't tell you about the RPC endpoints you're using. A network can be healthy, but a specific RPC provider might be down. That's why you need to monitor your RPC endpoints independently.
Setting up your own monitoring
You can set up simple uptime checks for your RPC endpoints using a monitoring service or a script. A basic health check might look like this:
curl -X POST https://celo.api.onfinality.io/public \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'
If the endpoint is healthy, you'll get a response with the current block number. You can automate this check to run every minute and alert you if it fails.
What to monitor
Beyond simple availability, you should monitor:
- Latency: How long it takes to get a response. High latency can degrade user experience.
- Error rates: The percentage of requests that fail or return errors.
- Consistency: Whether the endpoint returns the latest block data without lag.
For a more comprehensive view, you can use tools like the celo-community/rpc-uptime-data project, which monitors and reports RPC endpoint uptime and performance metrics for Celo networks.
Evaluating RPC providers for Celo
When choosing an RPC provider for Celo, you need to look beyond marketing claims. Here's a practical evaluation framework:
| Criterion | What to check | Why it matters |
|---|---|---|
| Uptime history | Look for published uptime data or status pages | Historical performance is a good indicator of future reliability |
| Failover behavior | Does the provider automatically route to healthy nodes? | Reduces the impact of individual node failures |
| Load balancing | How does the provider handle traffic spikes? | Prevents rate limiting and downtime during peak usage |
| Support | Is there a responsive support team? | Helps you resolve issues quickly |
| Transparency | Does the provider publish incident reports? | Builds trust and helps you plan |
Comparing providers
Here's a comparison of common RPC providers for Celo, with OnFinality listed first:
| Provider | Uptime tracking | Failover | Dedicated options |
|---|---|---|---|
| OnFinality | Status page and monitoring | Yes | Dedicated nodes |
| Provider A | Status page | Yes | Yes |
| Provider B | Limited | No | No |
Remember to check each provider's current status and terms. OnFinality offers RPC pricing and supports many networks, including Celo.
Building resilience into your dApp
Even with a reliable provider, you should design your dApp to handle RPC failures gracefully. Here are some strategies:
Use multiple endpoints
Configure your dApp to fall back to a secondary RPC endpoint if the primary fails. For example, in ethers.js:
import { ethers } from "ethers";
const primaryProvider = new ethers.JsonRpcProvider("https://celo.api.onfinality.io/public");
const fallbackProvider = new ethers.JsonRpcProvider("https://forno.celo.org");
const provider = new ethers.FallbackProvider([primaryProvider, fallbackProvider]);
Implement retry logic
For critical transactions, implement retry logic with exponential backoff. If a request fails, wait a short time and try again.
Monitor and alert
Set up alerts for when your RPC endpoint goes down or latency spikes. This allows you to respond quickly and minimize user impact.
Common pitfalls and how to avoid them
- Relying on a single endpoint: Even the best providers can have incidents. Always have a fallback.
- Ignoring testnet uptime: Testnet components often have lower uptime. Don't assume production reliability on testnets.
- Not monitoring latency: High latency can be as bad as downtime. Monitor both availability and performance.
- Overlooking provider transparency: Choose providers that publish status and incident reports.
Key Takeaways
- Celo uptime has two dimensions: network health and RPC endpoint reliability.
- Check the official Celo status page for network incidents.
- Monitor your RPC endpoints independently with health checks and latency tracking.
- Evaluate RPC providers based on uptime history, failover, and transparency.
- Build resilience into your dApp with multiple endpoints and retry logic.
Frequently Asked Questions
Q: What is the current Celo uptime?
A: Check the official Celo status page for real-time and historical uptime data.
Q: How do I monitor Celo RPC uptime?
A: Use a monitoring service or script to send periodic JSON-RPC requests to your endpoint and alert on failures.
Q: What should I look for in a Celo RPC provider?
A: Look for uptime history, failover capabilities, load balancing, and transparent incident reporting.
Q: Can I use OnFinality for Celo RPC?
A: Yes, OnFinality offers Celo RPC endpoints and dedicated nodes with monitoring and support.
Q: Why is my Celo RPC endpoint slow?
A: Latency can be caused by network congestion, provider load, or geographic distance. Consider using a provider with multiple regions or a dedicated node.
Related resources
Originally published at OnFinality.
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