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MCP Catalog Cache Guard
x402
MCP Catalog Cache Guard is a paid API for AI agents from phion.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-14).
Binds an MCP catalog digest to a TTL, scope, and revalidation policy to control caching behavior for AI-agent tool catalogs
Price / call$0.002
Success—
StatusUnknown
How this service works
Bind MCP catalog digest to TTL, scope and revalidation policy
Output
A signed policy binding that associates the provided MCP catalog digest with the specified TTL, scope, and revalidation rules — giving agents a verifiable, time-bounded trust anchor for catalog freshness enforcement.
Example use cases
Enforcing freshness on agent tool catalog
“Our MCP tool catalog digest needs to be pinned with a 10-minute TTL and a must-revalidate policy so agents don't use outdated tools — can you set that up using the catalog cache guard?”
Scope-limited catalog caching for multi-tenant agents
“I need to bind our MCP catalog digest to a per-session scope with a 2-minute TTL so different tenant agents can't accidentally share cached catalog state — please configure that with a revalidation policy.”
Preventing stale catalog trust in production
“We had an incident where agents used an expired catalog — can you bind the current catalog digest to a strict 1-minute TTL with immediate revalidation required before any agent calls trust it?”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/mcp-catalog-cache-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, signed cache governance for MCP catalog digests — especially in multi-agent or multi-tenant environments where stale tool catalogs could cause incorrect behavior. Prefer it over generic caching solutions when you need a portable, auditable policy receipt tied to a specific digest and scope.
Side effects
- Missing or malformed catalog digest returns a 400 validation error
- TTL value out of acceptable range results in a policy rejection
- Unrecognized scope identifier causes binding failure
- Expired x402 payment token leads to a 402 payment required response
- Conflicting revalidation policy parameters return a constraint violation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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