product · inferred from evidence
MCP spec
The Model Context Protocol specification, a set of rules or standards for tool schemas.
- Perplexity MCP 0.13/0.14 schema validation error: oneOf not supported - use 0.2.3
Those two versions were broken builds that got published by accident: a config change pushed auto-generated testing builds to npm, and their tool schemas violate the MCP spec, so clients reject them at startup. Do not use 0.13.0 or 0.14.0.