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Virtual Fly Brain
vfb3-mcp.virtualflybrain.org
Good
Protocol
Tools
All tools have descriptions
All tools have non-empty descriptions
All tools have OpenAI behavior hints
33 behavior annotation issue(s) found
How to fix: On each tool, declare annotations.readOnlyHint, annotations.destructiveHint, and annotations.openWorldHint as booleans. The policy review separately assesses whether their values match the tool's actual behavior.
Tool names use valid characters
All tool names use valid characters
Tool names follow the MCP 1–128 character range
All tool names follow the MCP recommended length
Tool names follow MCP uniqueness guidance
All tool names are unique
Tool input schemas have a valid object structure
All tool input schemas have a valid object structure
Tool invocation metadata present
No view resources found — view checks skipped
Tool text has no hidden control characters
No invisible or control characters found in tool-facing text
Tool input header annotations are valid
All x-mcp-header annotations satisfy Streamable HTTP requirements
Declared output schemas have a valid basic structure
0 declared output schema(s) pass basic structural validation; schemas may describe any JSON value, including arrays
Tool-linked resource URI is readable
No view resources found — view checks skipped
Tool visibility metadata is valid
No view resources found — view checks skipped
MCP Apps
All discovered view resources were inspected
No view resources found — view checks skipped
View resource envelope is valid
No view resources found — view checks skipped
View resources declare a domain
No view resources found — view checks skipped
Declared domains respond
No view resources found — view checks skipped
CSP metadata covers literal external origins
No view resources found — view checks skipped
View resource metadata complete
No view resources found — view checks skipped
Client compatibility
Skills over MCP resources are readable
Server does not advertise the Skills over MCP extension
Claude Code metadata fits its 2 KB fields
3 metadata field(s) exceed Claude Code's 2 KB truncation point
How to fix: Keep each tool description and the server instructions field at or below 2 KB, and put critical guidance first.
Claude tools declare applicable behavior hints
11 Claude behavior annotation issue(s) found
How to fix: For Claude directory submission, declare the applicable annotations.readOnlyHint or annotations.destructiveHint value as a boolean on every tool.
Cursor tool-name budget advisory
No tool name independently exhausts Cursor's observed 60-character combined budget
Claude tool names are within 64 characters
All tool names are within Claude's 64-character limit
ChatGPT tool names are unique
All tool names are unique
All tools have a display title
11 tool(s) missing a display title: get_term_info, run_query, search_terms, list_search_facets, resolve_entity, resolve_combination, list_connectome_datasets, query_connectivity, get_predicted_neurotransmitters, get_known_neurotransmitters, get_hierarchy
How to fix: Set the top-level tool.title to a short human-readable label (for example, "Search catalog"). Claude directory submission requires tool titles; annotations.title remains accepted only as a legacy fallback.
OpenAI file parameters use valid schemas
All declared OpenAI file parameters use reviewer-valid schemas
Overview
- Author
- Virtual Fly Brain
- Verification
- community
- Auth
- None — public endpoint
- Categories
- healthcare
- Works with
- claudeclaude-desktopclaude-code
- Docs
- Documentation
get_term_inforun_querysearch_termsFAQ
Virtual Fly Brain install, tools, readiness, and alternatives.
How do I add Virtual Fly Brain to Claude, ChatGPT, or Cursor?
Add Virtual Fly Brain to Claude, ChatGPT, or Cursor by connecting its remote MCP URL in each client's MCP settings. In Claude, add a custom connector. In ChatGPT, add an MCP app. In Cursor, add an MCP server under Settings. The MCP URL is https://vfb3-mcp.virtualflybrain.org/.
Is Virtual Fly Brain MCP ready for ChatGPT and Claude?
As of September 15, 2026, Virtual Fly Brain scores 78/100 on Manufact's MCP publishing checklist. The scan does not yet meet ChatGPT publishing checks and does not yet meet Claude publishing checks.
What tools does the Virtual Fly Brain MCP server provide?
Virtual Fly Brain provides these MCP tools: get_term_info, run_query, and search_terms.
Does Virtual Fly Brain MCP require authentication?
Virtual Fly Brain does not require authentication. It is a public MCP endpoint you can connect without logging in.
Who develops Virtual Fly Brain?
Virtual Fly Brain is developed by Virtual Fly Brain. It is listed as community on the Claude connector directory.
Not your MCP?
Scan any public or OAuth MCP URL against ChatGPT and Claude publishing checks. No account required.