tool · inferred from evidence
MCP client
A client that can use the MCP server for authentication.
- MySQL MCP: ER_ACCESS_DENIED_ERROR Access denied for user (check MYSQL_USER/PASS)
Fixes the MySQL MCP server failing with ER_ACCESS_DENIED_ERROR: Access denied for user. The cause is wrong credentials in the server env (MYSQL_USER / MYSQL_PASS) or the user lacking rights from the client host. The fix is verifying credent
- MongoDB MCP: ServerSelectionTimeoutError against Atlas (IP not on the access list)
Fixes the MongoDB MCP server timing out against MongoDB Atlas with ServerSelectionTimeoutError. The usual cause is the Atlas IP access list not including the machine running the MCP client. The fix is adding the current IP in the Atlas dash
- CLICKUP_API_TOKEN environment variable is required (ClickUp MCP)
Fixes the ClickUp MCP server refusing to start because the API token env var is missing. Use when the server exits immediately naming the variable. Not for invalid tokens.
- Error [TokenInvalid]: An invalid token was provided. (Discord MCP)
Fixes the Discord MCP server failing to log in with an invalid token error. Use when the token was pasted wrong, expired, or regenerated. Not for intent or channel issues.
- MCP error -32603: Discord client not logged in.
Fixes the Discord MCP server failing every tool with client not logged in. Use when the bot token tests fine via curl but the MCP server says it is not logged in. Not for invalid tokens or missing intents.
- Milvus MCP: connection refused (http/https and port mismatch in MILVUS_URI)
Fixes the Milvus MCP server failing with connection refused because of an http/https or port mismatch in MILVUS_URI. Milvus uses port 19530 for plaintext and the cloud endpoint for TLS. The fix is matching the scheme and port to the deploym
- Milvus MCP: permission denied on Zilliz Cloud (set MILVUS_TOKEN)
Fixes the Milvus MCP server failing with permission denied against Zilliz Cloud or secured Milvus. The server is not sending a token because MILVUS_TOKEN was never set. The fix is setting MILVUS_TOKEN in the server env. Use when connecting
- Jira MCP 401 Unauthorized with a scoped (granular) Atlassian API token
Fixes the Atlassian MCP server 401ing on Jira Cloud when using a granular scoped API token. Use when the token is fresh but every Jira call 401s on the classic URL. Not for expired tokens or OAuth flows.
- Elasticsearch MCP: 401 missing authentication credentials (set ES_API_KEY)
Fixes the Elasticsearch MCP server failing with 401 missing authentication credentials for REST request. The server is reaching Elasticsearch but sending no credentials. The fix is setting ES_API_KEY (or username/password) in the server con
- Chroma MCP: .env file ignored (set CHROMA_DOTENV_PATH to the absolute path)
Fixes the Chroma MCP server ignoring environment variables because the dotenv file is not loaded. The server reads a .env file only from the path in CHROMA_DOTENV_PATH (default .chroma_env in the working directory), and the MCP server's wor
- Chroma MCP: Embedding function name mismatch (delete and re-index the collection)
Fixes the Chroma MCP server failing with Embedding function name mismatch after CHROMA_EMBEDDING_FUNCTION was changed. Collections remember the embedding function they were created with. The fix is deleting and re-indexing the collection wi