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Bug: Task status/progress notifications hardcode ttl: 60000 instead of using DEFAULT_TTL_MS

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

good first issueWell-scoped issue for new contributors. Clear requirements and limited complexity.Well-scoped issue for new contributors. Clear requirements and limited complexity.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3279 In PrefectHQ/fastmcp;

· marlonbarreto-git opened on Feb 23, 2026

print() does not print anything in MCP server.

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

httpRelated to HTTP transport, networking, or web server functionality.Related to HTTP transport, networking, or web server functionality.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3278 In PrefectHQ/fastmcp;

· doyoungim999 opened on Feb 23, 2026

Support MCP client session resumption (sessionId reuse) – parity with python-sdk#2116

clientRelated to the FastMCP client SDK or client-side functionality.Related to the FastMCP client SDK or client-side functionality.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

httpRelated to HTTP transport, networking, or web server functionality.Related to HTTP transport, networking, or web server functionality.

potential-duplicateBot-suggested duplicate awaiting human review. Auto-closes after 3 days if unchallenged.Bot-suggested duplicate awaiting human review. Auto-closes after 3 days if unchallenged.

Status: Open.

#3277 In PrefectHQ/fastmcp;

· sr07asthana opened on Feb 23, 2026

Document all available settings and environment variables

documentationUpdates to docs, examples, or guides. Primary change is documentation-related.Updates to docs, examples, or guides. Primary change is documentation-related.

Status: Open.

#3275 In PrefectHQ/fastmcp;

· jlowin opened on Feb 22, 2026

Upgrade checks failing on main branch

build failed

Status: Open.

#3274 In PrefectHQ/fastmcp;

· github-actions opened on Feb 22, 2026

Support docket's <code>Shared()</code> dependencies in FastMCP tools

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3251 In PrefectHQ/fastmcp;

· omikader opened on Feb 20, 2026

FastMCP 3.0: generate-cli doesn't handle background tasks

cliRelated to FastMCP CLI commands (run, dev, install) or CLI functionality.Related to FastMCP CLI commands (run, dev, install) or CLI functionality.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

v3Targeted for FastMCP 3Targeted for FastMCP 3

Status: Open.

#3203 In PrefectHQ/fastmcp;

· yevhenp opened on Feb 17, 2026

Run MCP conformance tests

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

tests

Status: Open.

#3202 In PrefectHQ/fastmcp;

· jlowin opened on Feb 17, 2026

Hello world project errors when built by Prefect Horizon

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

cliRelated to FastMCP CLI commands (run, dev, install) or CLI functionality.Related to FastMCP CLI commands (run, dev, install) or CLI functionality.

duplicateDuplicates an existing open issue. Reference the original issue when applying.Duplicates an existing open issue. Reference the original issue when applying.

Status: Open.

#3184 In PrefectHQ/fastmcp;

· importRyan opened on Feb 13, 2026

Make the starlet lifespan state publically accessible

duplicateDuplicates an existing open issue. Reference the original issue when applying.Duplicates an existing open issue. Reference the original issue when applying.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3180 In PrefectHQ/fastmcp;

· jonha892 opened on Feb 13, 2026

Add httpx client query parameters to the request

duplicateDuplicates an existing open issue. Reference the original issue when applying.Duplicates an existing open issue. Reference the original issue when applying.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

httpRelated to HTTP transport, networking, or web server functionality.Related to HTTP transport, networking, or web server functionality.

openapiRelated to OpenAPI integration, parsing, or code generation features.Related to OpenAPI integration, parsing, or code generation features.

Status: Open.

#3164 In PrefectHQ/fastmcp;

· VladyslavHl opened on Feb 12, 2026

feat: add IconTheme type for light/dark mode icon support

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3162 In PrefectHQ/fastmcp;

· gfortaine opened on Feb 12, 2026