"protocols.io" matching MCP connectors:

Persistent knowledge graph for AI-augmented teams. Store decisions, findings, and standing rules across agent sessions with semantic search and typed connections. Includes cross-session memory, audit trail, workspace isolation, and secret detection. Built for teams running agents that need to remember.

PeeringDB MCP — the peering ecosystem database.

BookBrainz MCP — open book metadata (MetaBrainz / sister of MusicBrainz)

Crystallography Open Database (COD) MCP.

CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via

Salesforce MCP Pack

Medical codes MCP.

Airtable MCP Pack — wraps the Airtable REST API v0

Open Food Facts — collaborative food product database

Read, create, update and delete records; inspect objects, fields and schema in your Knack database.

SGD (Saccharomyces Genome Database) MCP.

OQMD (Open Quantum Materials Database) MCP.

Permission before writes. Gravity→DENYs→Session $0.25. Pilot $100; Gateway $299. Probe free.

mcp-serverAOAuth

Query BigQuery, Snowflake, Redshift & Azure Synapse with natural language

Dataassist-IO

Query your org's data in natural language — read-only MCP access to SQL, NoSQL, files & warehouses.

LemonadoOAuth

MCP server for querying and analyzing data from ad platforms, analytics tools, and spreadsheets

MCP server for managing Prisma Postgres.