4 tools. 1 can modify or destroy data without limits.
1 write tool that can modify data. Rate limits recommended.
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Execute tools (execute-request) trigger processes with side effects. Builds, notifications, workflows — all fired without throttling.
Intercept sits between your agent and Zerion API. Every tool call checked against your policy before it executes — so your agent can do its job without breaking things.
npx -y @policylayer/intercept scan -- npx -y @Zerion/zerion-api get-endpoint:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
The Zerion API server is primarily read-only with 3 read tools. While it cannot modify data, an agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up costs. Rate limiting is still recommended.
4 tools across 2 categories: Execute, Read. 3 are read-only. 1 can modify, create, or delete data.
One line change. Instead of running the Zerion API server directly, prefix it with Intercept: intercept -c zerion-zerion-api.yaml -- npx -y @Zerion/zerion-api. Download a pre-built policy from policylayer.com/policies/zerion-zerion-api and adjust the limits to match your use case.
Starter policies available for each. Same risk classification, same one-command setup.
Set budgets, approvals, and hard limits across MCP servers.
npx -y @policylayer/intercept init