Separate a track into 4 basic stems. — $0.20 USDC via x402 on Base (chain 8453).
Part of the Agentic Commerce Catalog server.
Free to start. No card required.
AI agents call stems_basic to retrieve information from Agentic Commerce Catalog without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though stems_basic only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"stems_basic": {}
}
}See the full Agentic Commerce Catalog policy for all 22 tools.
These attack patterns abuse exactly the kind of access stems_basic gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Separate a track into 4 basic stems. — $0.20 USDC via x402 on Base (chain 8453).. It is categorised as a Read tool in the Agentic Commerce Catalog MCP Server, which means it retrieves data without modifying state.
Register the Agentic Commerce Catalog MCP server in PolicyLayer and add a rule for stems_basic: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Agentic Commerce Catalog. Nothing to install.
stems_basic is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the stems_basic rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for stems_basic. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
stems_basic is provided by the Agentic Commerce Catalog MCP server (https://app.suedeai.ai/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 Agentic Commerce Catalog tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.