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SQD
io.github.subsquid-labs/portal-mcp-server in the official MCP registry.
Endpoint https://portal.sqd.dev/mcp. Source: github.com/subsquid-labs/portal-mcp-server.
The registry describes it as: Query 130+ SQD Portal datasets across blockchains, including native Tron transactions and events.
We read its 31 tools on 2026-10-21. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
portal_list_networks portal_get_network_info portal_get_head portal_resolve_entity portal_get_recent_activity portal_get_wallet_summary portal_get_time_series portal_evm_query_logs portal_evm_query_transactions portal_evm_query_traces portal_evm_query_token_transfers portal_evm_get_contract_deployment portal_evm_get_contract_activity portal_evm_get_analytics portal_evm_get_ohlc portal_solana_query_instructions portal_solana_query_transactions portal_solana_get_analytics portal_bitcoin_query_transactions portal_bitcoin_get_analytics portal_substrate_query_events portal_substrate_query_calls portal_substrate_get_analytics portal_hyperliquid_query_fills portal_hyperliquid_get_analytics portal_hyperliquid_get_ohlc portal_tron_query_transactions portal_tron_query_logs portal_debug_query_blocks portal_debug_resolve_time_to_block portal_debug_hyperliquid_query_replica_commands
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-github-subsquid-labs-portal-mcp-server)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.