F# Interactive MCP Server

MCP server providing access to F# Interactive (FSI) — the F# REPL and scripting environment. Enables AI agents to evaluate F# expressions and scripts in a live FSI session, inspect values, and interact with .NET/F# code dynamically — enabling AI-assisted F# development with real evaluation capabilities.

Evaluated Mar 06, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Developer Tools fsharp fsi dotnet repl functional-programming mcp-server interactive

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

100

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Full .NET runtime execution. Development only. Cannot expose to untrusted agents.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

An F# developer using interactive REPL-driven development wants AI agents to evaluate F# code, test expressions, and provide real code feedback — complementing functional programming workflows with live evaluation.

Avoid When

You don't use F#. Also: FSI provides full .NET runtime access — avoid using on production systems without sandboxing.

Use Cases

• Evaluating F# expressions and testing code snippets from F# development agents
• Running F# scripts and analyzing results from data analysis agents
• Interactive F# exploration and debugging from AI coding assistants
• Building F#/.NET-based prototypes with AI-evaluated incremental development

Not For

• Teams not using F# or .NET (language-specific tool)
• Production runtime access without proper sandboxing
• C# or VB.NET scripting (FSI is F#-specific)

Interface

REST API

GraphQL

gRPC

MCP Server

Yes ↗

SDK

Webhooks

Authentication

Methods: none

OAuth: No Scopes: No

No authentication — local FSI session. .NET SDK required.

Pricing

Model: free

Free tier: Yes

Requires CC: No

.NET SDK and F# are free Microsoft open source. MCP server is free open source.

Agent Metadata

Pagination

none

Idempotent

Partial

Retry Guidance

Not documented

Known Gotchas

⚠ FSI provides full .NET runtime access — only use in development environments
⚠ F# type system errors can be cryptic — agents need strong F# knowledge for effective use
⚠ FSI state persists across evaluations in a session — agents should manage state carefully
⚠ Long-running computations may block FSI session — implement timeouts

Alternatives

dotnet-script-mcp jupyter-mcp-server nrepl-mcp-server

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for F# Interactive MCP Server.

$99

API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.