Robinhood Chain public endpoint (no API key)

Call Robinhood Chain from a browser or a script without an API key: 18 read-only JSON-RPC methods, published per-IP limits and CORS enabled.

Triport publishes a keyless endpoint for Robinhood Chain mainnet (chain ID 4663). It exists so wallets, chain lists and first experiments can reach the network without an account. It is not a smaller version of the product: it serves read-only methods, has hard limits, and carries no availability commitment.

For anything steady, use the keyed endpoint https://triport.io/rpc/robinhood — see the Quickstart.

What you can call

The public endpoint serves the 18 methods catalogued as light reads:

eth_blockNumber, eth_call, eth_chainId, eth_estimateGas, eth_feeHistory, eth_gasPrice, eth_getBalance, eth_getBlockByHash, eth_getBlockByNumber, eth_getCode, eth_getStorageAt, eth_getTransactionByHash, eth_getTransactionCount, eth_getTransactionReceipt, eth_maxPriorityFeePerGas, eth_syncing, net_version, web3_clientVersion.

The list is derived from the same method catalog that drives the keyed endpoint, so it moves with the catalog rather than with a separate hand-kept list.

What it does not serve

A call to any of them returns HTTP 403 with a JSON-RPC error -32601 naming the keyed URL:

{"jsonrpc":"2.0","id":1,"error":{"code":-32601,"message":"eth_getLogs is not available without a key — use https://triport.io/r/<API_KEY>/rpc/robinhood"}}

Limits

A batch of five calls costs five calls, exactly as on the keyed endpoint. Exceeding a limit returns HTTP 429 with a Retry-After header; an oversized body or batch returns HTTP 413. These numbers are operational defaults for a free shared surface, not a measurement of upstream capacity, and they are deliberately far below any paid plan — see Limits for the per-plan rates.

First call

curl https://triport.io/rpc/robinhood/public \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'

{"jsonrpc":"2.0","id":1,"result":"0x1237"}

0x1237 is 4663 — mainnet. Wallets reject a network whose eth_chainId disagrees with the configured chain ID, so this is the first thing to check when adding the network by hand.

Adding the network to a wallet

Use RPC URL https://triport.io/rpc/robinhood/public, chain ID 4663, currency symbol ETH. A wallet configured this way can read balances and submit nothing: sends are refused, so sign-and-send flows need the keyed URL from the Quickstart.

When to move to a key

• Your traffic is regular rather than occasional, and 60 calls per minute is a ceiling you actually meet.
• You need logs, receipts, proofs or debug_*.
• You need to submit transactions.
• You need subscriptions or the sequencer feed instead of polling.
• You want limits you can plan against, published per plan, instead of a shared free ceiling.

Notes

• The testnet (chain ID 46630) is not proxied by Triport, on this endpoint or any other.
• Sending x-token, Authorization or ?api-key= to this URL does nothing: the credential is stripped before the request is served, and it is never authenticated. Use the keyed endpoint if you want your plan's limits.
• Error shapes, batch accounting and the 4 MiB body ceiling of the keyed endpoint are documented in Limits and Errors.