AI Agent → MCPGate (:4020) → Credential Adapter → Target Service

// Example: composite adapter with env fallback
const adapter = new CompositeAdapter([
  new DatabaseAdapter(db, encryptionKey),
  new EnvVarAdapter(),
]);

const token = await adapter.getToken("github", agentId);

const session = await mcpgate.sessions.create({
  agentId: "agent-123",
  budget: {
    maxToolCalls: 50,
    maxCostUsd: 1.00,
    maxDurationMs: 300000,  // 5 minutes
    enforcement: "hard",     // reject calls over budget
  },
});

GET /tools/search?q=send+slack+message

const result = await mcpgate.chains.execute({
  steps: [
    { id: "fetch", tool: "github.get_issue", params: { number: 42 } },
    { id: "notify", tool: "slack.post_message", params: {
      channel: "#eng",
      text: "Issue #42: {{fetch.title}} — {{fetch.status}}"
    }},
  ],
});