Ankr
Instead of running a node and manually managing that infrastructure, developers can use third-party node providers like Ankr to execute their transactions.
The Ankr RPC API, maintained by Ankr, provides HTTP and websocket endpoint with a limited number of API methods for both mainnet and testnet. For the most up-to-date information on, see the official Ankr documentation
Mainet HTTP endpoint:
https://rpc.ankr.com/filecoin
Testnet HTTP endpoint:
https://rpc.ankr.com/filecoin_testnet
Supported API methods for mainnet endpoint: The HTTP and websocket endpoints for mainnet currently support these API methods.
Supported API methods for testnet endpoint The HTTP and websocket endpoints for testnet currently support all supported mainet API methods listed above, along with applicable EVM-compatible methods, except for those listed as unsupported.