chuk-mcp-runtime
Officialby IBM
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| HUB_ID | No | Hub instance identifier for distributed deployments | |
| POD_IP | No | Pod IP for service discovery | |
| HUB_URL | No | Hub registration endpoint URL | |
| HUB_ADDR | No | Hub communication address | |
| POD_NAME | No | Kubernetes pod name (auto-detected) | |
| HUB_TOKEN | No | Hub authentication token | |
| REDIS_URL | No | Redis connection URL (standalone or cluster with comma-separated nodes) | redis://localhost:6379 |
| AWS_REGION | No | AWS region for S3 storage | us-east-1 |
| JWT_LEEWAY | No | Clock drift tolerance in seconds for JWT validation | 0 |
| SANDBOX_ID | No | Another alternative sandbox ID | |
| ENVIRONMENT | No | Environment name for namespace isolation | dev |
| TOOL_TIMEOUT | No | Alternative tool timeout variable | |
| DEPLOYMENT_ID | No | Deployment identifier for namespace isolation | default |
| JWT_ALGORITHM | No | JWT signing algorithm | HS256 |
| SBX_TRANSPORT | No | Sandbox transport protocol (http, grpc) | |
| IBM_COS_APIKEY | No | IBM COS API key (IAM authentication) | |
| JWT_SECRET_KEY | No | JWT signing secret (required if auth is enabled) | |
| MCP_SANDBOX_ID | No | Sandbox identifier | |
| ARTIFACT_BUCKET | No | Bucket name for artifact storage | local-artifacts |
| CHUK_SANDBOX_ID | No | Alternative sandbox ID | |
| S3_ENDPOINT_URL | No | S3-compatible endpoint URL (for MinIO, Tigris, etc.) | |
| ARTIFACT_FS_ROOT | No | Base path for filesystem artifact storage | ./artifacts |
| IBM_COS_ENDPOINT | No | IBM Cloud Object Storage endpoint URL | |
| MCP_TOOL_TIMEOUT | No | Default tool timeout in seconds | 60 |
| AWS_ACCESS_KEY_ID | No | AWS access key ID for S3 storage | |
| CHUK_MCP_LOG_LEVEL | No | Global log level (DEBUG, INFO, WARNING, ERROR) | INFO |
| REDIS_TLS_INSECURE | No | Disable SSL certificate verification for Redis (0 or 1) | 0 |
| CHUK_MCP_CONFIG_PATH | No | Path to YAML config file | |
| IBM_COS_INSTANCE_CRN | No | IBM COS instance CRN | |
| SANDBOX_REGISTRY_TTL | No | Sandbox registry entry TTL in seconds | 86400 |
| AWS_SECRET_ACCESS_KEY | No | AWS secret access key for S3 storage | |
| JWT_ALLOWED_ALGORITHMS | No | Accepted JWT algorithms (comma-separated) | |
| ARTIFACT_SESSION_PROVIDER | No | Session provider for artifacts (memory, redis) | memory |
| ARTIFACT_STORAGE_PROVIDER | No | Artifact storage provider (memory, filesystem, s3, ibm_cos) | memory |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": false
} |
| resources | {
"subscribe": false,
"listChanged": false
} |
| experimental | {} |
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 | |
Maintenance
ActivityMaintained
ResponsivenessUnresponsive