Fatstack
https://www.fatstack.net/api/mcp
MCP · HTTP HTTP Transport in catalog since Oct 24
63
of 100
Tool descriptions contain instructions to the agent
Security audit detected prompt injection in tool descriptions: [financial_raw_evm_address: "0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9"], [financial_raw_evm_address: "0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9"], [financial_raw_evm_address: "0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9"]. These directives may attempt to hijack your agent's behavior.
Availability 100
Weight 30% · 7-day uptime
Honesty 100
Weight 30% · price match
Safety 0
Weight 25% · prompt injection
Maturity 20
Weight 15% · longevity
Service Metadata
Host
Listed Price
Free / Undisclosed
Payee (Catalog)
—
30-day Unique Payers
0 buyers
First Seen
2026-10-24
Last Diagnostic Run
2026-10-24 19:01 UTC
Discovered via
mcp_registry
Embed Badge
Diagnostic Runs
pass fail skipped
mcp_list Pass: discovered 15 tools (fatstack__free_demo, echo__echo_json, json-schema-validate__json_schema_validate)
reach HTTP 200 · 1713 ms · raw response
Community
0 votes from verified emails. Votes adjust the score by at most ±10 and never change a flag.
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For your agent
$ curl https://capkey.dev/api/v1/score?url=www.fatstack.net/api/mcp
{ "total": 63, "badge": "flagged",
"verdict": "tool_descriptions_contain_inst", "checked_at": "2026-10-24T19:01:31.497Z" }
{ "total": 63, "badge": "flagged",
"verdict": "tool_descriptions_contain_inst", "checked_at": "2026-10-24T19:01:31.497Z" }