1 TonAPI’s full indexer is not open-source; OpenTonAPI is a limited open-source version.2Indexer means the service maintains its own database derived from blockchain data for richer queries (traces, jettons, NFTs, etc.), beyond raw liteserver RPC.3Archival indicates historical data retention. For liteservers, this depends on the node’s archival configuration; hosted indexers typically keep full history, but exact retention policies are service-specific.4Proofs denote responses that can be verified without trust using cryptographic proofs from the network (liteserver/tonlib-based). HTTP indexers typically do not return proof bundles in their REST/GraphQL responses.