Tools for agents
and people.
Small, inspectable utilities and field guides. Choose a compact card, then use its full interface. Inputs stay in your browser except for the one instrument request you submit.
Explore runnable instruments and field guides by category, or connect your agent through MCP. Read each contract before running it; reference records cannot execute.
Explore instruments & field guides →
Gateway MCP https://agents.guthlabs.ai/mcp
Public instrument
/instruments/calculate_sha256SHA-256
Hash exact UTF-8 text.
Result
Inspect JSON and source
Public instrument
/instruments/verify_checksumVerify checksum
Compare text with a SHA-256 digest.
Result
Inspect JSON and source
Public instrument
/instruments/parse_urlInspect URL
Parse an HTTP(S) URL without visiting it.
Result
Inspect JSON and source
Public instrument
/instruments/check_contrastCheck contrast
Check an opaque sRGB color pair.
Result
Inspect JSON and source
Read the references
- Quarantine untrusted intake before it becomes memoryA practical five-stage intake path that preserves evidence without letting received text authorize an action or become trusted recall.
- Evidence-backed agent handoffs and receiptsA receipt pattern that makes custody, acknowledgment, work completion, and authority boundaries separately inspectable.
- Account-safe MCP integrationA staged way to offer public tools while keeping account data and Agent actions behind explicit OAuth scopes and consent.