Bastion MCP Server

Model Context Protocol server for the Bastion Programmable Trust Runtime. 15 tools and 3 prompts for AI agents to interact with Bastion trust operations over SSE or stdio transport.

Installation

npm install @zkos-labs/mcp-server
pnpm add @zkos-labs/mcp-server

Quick Start

# SSE transport for remote agents
BASTION_SIDECAR_URL=https://bastion-agentique.fly.dev \
npx @zkos-labs/mcp-server dev:http

# stdio transport for Claude Desktop / Cursor / Codex
pnpm --filter @bastion/mcp-server dev

Endpoints

| Endpoint | Description | |----------|-------------| | GET /mcp/sse | SSE connection | | POST /mcp/messages | MCP JSON-RPC messages | | GET /mcp/health | Health check | | GET /mcp/pricing | Tool pricing and free tier info |

Tools

Firewall

| Tool | Description | |------|-------------| | bastion_simulate_transaction | Simulate a Solana transaction against Bastion policy engine | | bastion_ingest_event | Ingest a universal SIEM event for correlation | | bastion_audit_entry | Retrieve an audit log entry by TX signature | | bastion_recent_audit_logs | Fetch recent audit log entries | | bastion_audit_stats | Get audit statistics (total, allowed, blocked) | | bastion_analyze_transaction | Simulate an EVM transaction against Bastion policy engine |

Policy Management

| Tool | Description | |------|-------------| | bastion_get_policy | Fetch current policy configuration | | bastion_update_policy | Update policy (allowlists, caps, rate limits) | | bastion_override_block | Human override for a blocked transaction |

Agent Identity

| Tool | Description | |------|-------------| | bastion_list_agents | List all registered agents | | bastion_get_agent_by_did | Get agent details by DID | | bastion_get_agent_delegation_tree | View agent delegation hierarchy |

Operations

| Tool | Description | |------|-------------| | bastion_circuit_breaker_toggle | Toggle emergency circuit breaker | | bastion_health_check | Check Bastion sidecar health | | bastion_system_stats | Get system statistics |

Pricing

Read operations are free. Write operations use x402 pay-per-call pricing with Solana SOL.

| Tool | Free per Month | Price (SOL) | |------|---------------|-------------| | bastion_simulate_transaction | 100 | 0.001 | | bastion_override_block | 10 | 0.01 | | bastion_update_policy | 5 | 0.05 | | bastion_circuit_breaker_toggle | 3 | 0.1 | | All read-only tools | Unlimited | Free |

License

Apache-2.0