Changelog

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All notable changes to this project will be documented in this file.

0.1.2 - 2026-05-27

  • refocus auth around application-owned authenticators, keeping the normalized FastestMCP.Auth contract, FastestMCP.Auth.Result, FastestMCP.Auth.StaticToken, and component authorization
  • add function-based auth and FastestMCP.Auth.from_assign/2 for Plug/Phoenix integrations
  • add HTTP auth_assigns: support so selected conn.assigns can feed auth input without exposing assigns through handler request metadata
  • remove bundled OAuth, JWT/JWKS, introspection, CIMD, and vendor auth provider modules, and remove the :assent and :jose dependencies
  • remove the :jason dependency and use Elixir's native JSON module
  • keep default HTTP auth failures on plain bearer challenges and remove built-in OAuth metadata/authorization/token route handling from core
  • improve OpenAPI-backed tools with JSON media-type variants, form and multipart request bodies, cookie parameters, server variable defaults, and circular schema reference protection
  • add multipart request support to FastestMCP.HTTP.request/3
  • improve resource-template matching for hyphenated parameters, blank query values, collision rejection, and path-capture precedence
  • add server experimental_capabilities: metadata for initialize responses
  • improve mounted runtime behavior with self-mount rejection, recursive mounted lifespans, child-first cleanup, and stream shutdown before cleanup
  • update tracing and error logging with MCP/GenAI span attributes, stable resource span names, error.type, nil-attribute filtering, arity-2 loggers, and per-error log levels
  • document Phoenix-oriented auth, OpenAPI request serialization, resource-template matching, mounted lifespans, experimental capabilities, telemetry attributes, and error logging behavior
  • add task wait behavior for input-required states, auth-scoped task ownership, and elicitation response metadata
  • improve handler result normalization for safe finite enumerable values
  • add regression coverage for auth contracts, Phoenix assign auth, task ownership, scalar elicitation, mounted wildcard resources, and tool/resource return normalization
  • document auth assign bridging, task wait behavior, elicitation response metadata, and finite enumerable normalization

0.1.1 - 2026-04-17

  • update broken project links in package metadata
  • update the Hex package description to emphasize the BEAM-native MCP runtime, client, auth, and transport surfaces