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ykq007

mcp-nexus

by ykq007
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Server Configuration

Describes the environment variables required to run the server.

NameRequiredDescriptionDefault
HOSTNoThe host address for the server to listen on.0.0.0.0
PORTNoThe port for the server to listen on.8787
DATABASE_URLNoConnection string for the database. For local setups, a file-based SQLite DB is recommended.file:./tavily_bridge.db
BRAVE_API_KEYNoA Brave Search API key. If set, this single key will be used. For multi-key support, add keys via the Admin UI.
BRAVE_MAX_QPSNoMax requests per second to the Brave API to stay within rate limits.1
BRAVE_OVERFLOWNoBehavior when the request queue is full: fallback_to_tavily, queue, or error.fallback_to_tavily
ADMIN_API_TOKENNoBearer token for accessing the Admin API.(generated in example)
MCP_COOLDOWN_MSNoCooldown period in milliseconds for an upstream API key after a failure.60000
MCP_MAX_RETRIESNoMaximum number of retries for failed upstream requests.2
ENABLE_QUERY_AUTHNoIf true, also allow passing the MCP client token via query string instead of Authorization header.false
BRAVE_MAX_QUEUE_MSNoMax time a request can wait in the queue before failing or falling back to Tavily.30000
SEARCH_SOURCE_MODENoDefines the search behavior: tavily_only, brave_only, combined, or brave_prefer_tavily_fallback.brave_prefer_tavily_fallback
BRAVE_HTTP_TIMEOUT_MSNoPer-request HTTP timeout for the Brave API.20000
BRAVE_MIN_INTERVAL_MSNoOverrides BRAVE_MAX_QPS with a fixed minimum interval between requests.
KEY_ENCRYPTION_SECRETNoA 32-byte (256-bit) secret key used for encrypting and decrypting upstream API keys stored in the database.(generated in example)
TAVILY_USAGE_LOG_MODENoLog level for Tavily tool usage: none, hash, preview, or full.preview
TAVILY_USAGE_HASH_SECRETNoOptional secret for creating a keyed HMAC-SHA256 hash of queries instead of a plain SHA256.
TAVILY_USAGE_SAMPLE_RATENoOptional sampling rate (0.0 to 1.0) for logging usage events.
MCP_RATE_LIMIT_PER_MINUTENoMax requests per minute per client token.60
TAVILY_CREDITS_COOLDOWN_MSNoCooldown duration for a key that has fallen below the minimum credit threshold.300000
TAVILY_CREDITS_CACHE_TTL_MSNoDuration to cache Tavily credit information before it's considered stale.60000
TAVILY_USAGE_RETENTION_DAYSNoOptional retention period for usage logs.
TAVILY_CREDITS_MIN_REMAININGNoCredit threshold at which a Tavily key will be automatically put into cooldown status.1
TAVILY_KEY_SELECTION_STRATEGYNoStrategy for picking an upstream Tavily key when multiple are active: round_robin or random.round_robin
TAVILY_CREDITS_REFRESH_LOCK_MSNoLock duration to prevent concurrent credit refreshes for the same key.15000
MCP_GLOBAL_RATE_LIMIT_PER_MINUTENoMax requests per minute across all clients.600
TAVILY_USAGE_CLEANUP_PROBABILITYNoThe probability (0.0 to 1.0) that a cleanup of old usage logs is triggered on a new usage event.0.001
TAVILY_CREDITS_REFRESH_TIMEOUT_MSNoTimeout for the upstream Tavily credits API request.5000
ADMIN_KEY_REVEAL_RATE_LIMIT_PER_MINUTENoMax key reveal attempts per minute in the Admin UI.20

Capabilities

Server capabilities have not been inspected yet.

Tools

Functions exposed to the LLM to take actions

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No tools

Prompts

Interactive templates invoked by user choice

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No prompts

Resources

Contextual data attached and managed by the client

NameDescription

No resources

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