cURL

curl is the fastest way to poke at the Avalanche C-Chain without pulling in an SDK — ideal for testing an endpoint, debugging a malformed payload, or wiring an RPC call into a shell script or CI job. Every C-Chain JSON-RPC request is an HTTP POST with the header Content-Type: application/json, carrying a JSON body that names the method and params. Your API key goes in the URL path: https://avalanche.therpc.io/YOUR_API_KEY.

You can authenticate to the C-Chain endpoint two ways: place the key directly in the URL path (https://avalanche.therpc.io/YOUR_API_KEY), or send it as a Bearer token in the Authorization: Bearer YOUR_API_KEY header. Either way, the request must be a POST with Content-Type: application/json — Avalanche JSON-RPC does not accept GET requests.

Basic Usage

1curl -X POST \
2  -H "Content-Type: application/json" \
3  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' \
4  https://avalanche.therpc.io/YOUR_API_KEY

Authentication

1curl -X POST \
2  -H "Content-Type: application/json" \
3  -H "Authorization: Bearer YOUR_API_KEY" \
4  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' \
5  https://avalanche.therpc.io/YOUR_API_KEY

Common Operations

1curl -X POST \
2  -H "Content-Type: application/json" \
3  --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x742d35Cc6634C0532925a3b844Bc454e4438f44e","latest"],"id":1}' \
4  https://avalanche.therpc.io/YOUR_API_KEY

1curl -X POST \
2  -H "Content-Type: application/json" \
3  --data '{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"],"id":1}' \
4  https://avalanche.therpc.io/YOUR_API_KEY

cURL

Basic Usage

Authentication

Common Operations

准备好在生产环境中调用了吗？

cURL

Basic Usage

Authentication

Common Operations