Mainnets
Use the chain ID in filter parameters such asfilter[chain_ids].
Testnets
Testnet data is served from a separate environment. Pass theX-Env: testnet header with your request to query these chains.
Reference list of mainnet and testnet blockchains supported by the Zerion API, with chain IDs and coverage for tokens, transactions, and NFTs.
filter[chain_ids].
X-Env: testnet header with your request to query these chains.