Healthy testnet RPC for broadcasting transactions? (rpc.nimiq-testnet.com returns nginx 500)

I need to broadcast NIM transactions on testnet from a small backend (treasury → user payouts at settlement).

My transport is offline-sign + HTTP JSON-RPC: build & sign the tx offline

(TransactionBuilder.newBasic → signTransaction → toHex), then POST sendRawTransaction

to a node. This works perfectly against the public mainnet RPC

https://rpc.nimiqwatch.com — it returns a tx hash and accepts the tx.

The blocker: the testnet equivalent https://rpc.nimiq-testnet.com is returning an

nginx 500 (not responding), so I can't broadcast on testnet.

Questions:

1. Is there a healthy/official public testnet (Albatross) JSON-RPC endpoint I can

point at — or is rpc.nimiq-testnet.com expected to come back up?

2. If not, what's the recommended way for a Mini App backend to broadcast testnet

transactions? (I'd prefer not to run a local node — @nimiq/core's Node client

throws on worker init / never reaches consensus in plain Node.)

3. Otherwise, is mainnet with tiny real amounts the intended path for testing

Mini App money flows?

Thanks!

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Healthy testnet RPC for broadcasting transactions? (rpc.nimiq-testnet.com returns nginx 500)

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