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com.narrowhighway/concordance
com.narrowhighway/concordance in the official MCP registry.
Endpoint https://narrowhighway.com/mcp. Source: github.com/matharrismma/concordance-2.
The registry describes it as: Deterministic claim verification with receipts across ~60 domains. No model in the loop.
We read its 102 tools on 2026-10-28. 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
verify audit seal_fetch find_verifier attest_record candidate_commit candidate_get candidate_narrow kernel kernel_gate manufacture profession redact report resolve self_attest witness_profession witnesses search card_get lookup define card_connections cards_browse cards_stats daily_card grid_axis grid_dimension locate pronounce thesaurus capabilities library_health now steward_budget steward_cost_destroyed ask discern coach_next coach_guidance coach_mastery coach_overview coach_recommend coach_subjects coach_unit parable playbook_read identity_create study_create decks badges_issue badges_verify calendar_create commons_read consent_check curate curate_queue curate_signable deck_open group_contribute and 42 more
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[](https://lazaretto.dev/mcp-registry/com-narrowhighway-concordance)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.