duckdb-iceberg-mcp
by ys1173
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| JWKS_URL | No | JWKS endpoint for JWT validation (required in full mode) | |
| MAX_ROWS | No | Maximum rows returned per query | 250 |
| MCP_HOST | No | Bind address for HTTP/SSE | 127.0.0.1 |
| MCP_MODE | No | Easy or full authentication mode | easy |
| MCP_PORT | No | Port for HTTP/SSE | 8000 |
| MAX_CHARS | No | Maximum characters in a query response | 40000 |
| AWS_REGION | No | AWS region | us-east-1 |
| WRITE_MODE | No | Write mode: disabled or enabled (always disabled in easy mode) | disabled |
| AWS_PROFILE | No | Named AWS profile | |
| MCP_API_KEY | No | Static bearer token for easy mode HTTP. Empty = no auth | |
| CATALOG_TYPE | No | Catalog type (only glue supported) | glue |
| JWT_AUDIENCE | No | Expected aud claim in JWTs | duckdb-iceberg-mcp |
| MCP_TRANSPORT | No | Transport protocol: stdio, http (Streamable HTTP), or sse | stdio |
| AWS_ACCESS_KEY_ID | No | AWS access key | |
| MCP_ALLOWED_HOSTS | No | Comma-separated allowed Host headers (e.g. host.docker.internal:*,localhost:*). Empty = SDK default | |
| AWS_SECRET_ACCESS_KEY | No | AWS secret key |
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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