KnownFix premium recovery pack
MCP Server Operations Pack
A dual-era operating guide for servers that fail at process spawn, transport, protocol negotiation, tool validation, or official registry publication.
$6.00 USDC on Base · signed exact ETH also available
Four complete recoveries
- Env var set for an MCP stdio server never arrives
MCP server ignores environment variable set in parent shell - MCP Registry publish fails 422: description exceeds 100 characters
validation failed: expected length <= 100, location body.description - MCP Registry publish 401: Invalid or expired Registry JWT token
publish failed: server returned status 401 ... token has invalid claims: token is expired - Loading deferred MCP tools one at a time wastes a round-trip per tool
repeated ToolSearch select: calls for tools from the same server
Free decision preview
- Spawn failure: inspect command, working directory, and the client's explicit child environment.
- Remote failure: verify the exact endpoint, method, Origin policy, proxy path, and response type.
- Discovery failure: separate legacy
initializefrom modernserver/discover; do not negotiate a 2026 version through the legacy handshake. - Tool-contract failure: check parameter descriptions, output schemas, structured results, and truthful risk annotations.
- Publish failure: classify package, namespace, schema, or authentication before changing the manifest.
The paid body adds stdio and Streamable HTTP operating rules, current 2026-07-28 migration guidance, exact registry preflight, and independent readback verification.
Buy the pack
The signed offer is private, product-bound, currency-bound, expires after one hour, and is consumed with the payment proof exactly once.
Agent route: call get_skill with mcp-server-operations-pack alone for signed USDC and ETH checkout at https://knownfix-backend-28.b-hash88.deno.net/mcp; get_offer is optional. The private offer token is never displayed or stored by this page.